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  • 1.
    Abad-Gurumeta, A.
    et al.
    Hosp Univ la Paz, Dept Anaesthesia, Madrid, Spain.
    Ripolles-Melchor, J.
    Univ Complutense Madrid, Hosp Univ Infanta Leonor, Dept Anaesthesia, Madrid, Spain.
    Casans-Frances, R.
    Hosp Clin Univ Lozano Blesa, Dept Anaesthesia, Zaragoza, Spain.
    Espinosa, A.
    Orebro Univ Hosp, Dept Anaesthesia, Orebro, Sweden.
    Martinez-Hurtado, E.
    Univ Complutense Madrid, Hosp Univ Infanta Leonor, Dept Anaesthesia, Madrid, Spain.
    Fernandez-Perez, C.
    Univ Complutense Madrid, Dept Consultant Prevent Med & Publ Hlth, Madrid, Spain.
    Ramirez, J. M.
    Univ Zaragoza, Dept Colorectal Surg, Zaragoza, Spain.
    Lopez-Timoneda, F.
    Univ Complutense Madrid, Hosp Clin San Carlos, Dept Anaesthesia, Madrid, Spain.
    Calvo-Vecino, J. M.
    Univ Complutense Madrid, Hosp Univ Infanta Leonor, Dept Anaesthesia, Madrid, Spain.
    A systematic review of sugammadex vs neostigmine for reversal of neuromuscular blockade2015In: Anaesthesia, ISSN 0003-2409, E-ISSN 1365-2044, Vol. 70, no 12, 1441-1452 p.Article, review/survey (Refereed)
    Abstract [en]

    We reviewed systematically sugammadex vs neostigmine for reversing neuromuscular blockade. We included 17 randomised controlled trials with 1553 participants. Sugammadex reduced all signs of residual postoperative paralysis, relative risk (95% CI) 0.46 (0.29-0.71), p=0.0004 and minor respiratory events, relative risk (95% CI) 0.51 (0.32-0.80), p=0.0034. There was no difference in critical respiratory events, relative risk (95% CI) 0.13 (0.02-1.06), p=0.06. Sugammadex reduced drug-related side-effects, relative risk (95% CI) 0.72 (0.54-0.95), p=0.02. There was no difference in the rate of postoperative nausea or the rate of postoperative vomiting, relative risk (95% CI) 0.94 (0.79-1.13), p=0.53, and 0.87 (0.65-1.17), p=0.36 respectively.

  • 2.
    Abrahamsson, Pernilla
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Methodological aspects on microdialysis sampling and measurements2010Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Background:     The microdialysis (MD) technique is widely spread and used both experi­mentally and in clinical practice. The MD technique allows continuous collection of small molecules such as glucose, lactate, pyruvate and glycerol. Samples are often analysed using the CMA 600 analyser, an enzymatic and colorimetric analyser.  Data evaluating the performance of the CMA 600 analysis system and associated sample han­dling are sparse. The aim of this work was to identify sources of variability related to han­dling of microdialysis samples and sources of error associated with use of the CMA 600 analyser. Further, to develop and compare different application techniques of the micro­dialysis probes both within an organ and on the surface of an organ.

     Material and Methods:  Papers I and II are mainly in vitro studies with the exception of the No Net Flux calibration method in paper I where a pig model (n=7) was used to exam­ine the true concen­tration of glucose and urea in subcutaneous tissue. Flow rate, sampling time, vial and caps material and performance of the analyser device (CMA 600) were examined. In papers III and IV normoventilated anaesthetised pigs (n=33) were used. In paper III, heart ischemia was used as intervention to compare microdialysis measurements in the myocardium with corresponding measurements on the heart surface. In paper IV, microdialysis measurements in the liver parenchyma were compared with measurements on the liver surface in associa­tion with induced liver ischemia. All animal studies were approved by the Animal Experi­mental Ethics Committee at Umeå University Sweden.

    Results:  In paper I we succeeded to measure true concentrations of glucose (4.4 mmol/L) and Urea (4.1 mmol/L) in subcutaneous tissue. Paper II showed that for a batch analyse of 24 samples it is preferred to store microdialysis samples in glass vials with crimp caps. For reliable results, samples should be centrifuged before analysis. Paper III showed a new application area for microdialysis sampling from the heart, i.e. surface sampling. The sur­face probe and myocardial probe (in the myocardium) showed a similar pattern for glucose, lactate and glycerol during baseline, short ischemic and long ischemic interventions. In paper IV, a similar pattern was observed as in paper III, i.e. data obtained from the probe on the liver surface showed no differences compared with data from the probe in liver paren­chyma for glucose, lactate and glycerol concentrations during baseline, ischemic and reperfusion interven­tions.

    Conclusion:  The MD technique is adequate for local metabolic monitoring, but requires methodological considerations before starting a new experimental serie. It is important to consider factors such as flow rate, sampling time and handling of samples in association with the analysis device chosen. The main finding in this thesis is that analyses of glucose, lactate and glycerol in samples from the heart surface and liver surface reflect concentra­tions sampled from the myocardium and liver parenchyma, respectively.

  • 3.
    Abrahamsson, Pernilla
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Winsö, Ola
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    An assessment of calibration and performance of the microdialysis system2005In: Journal of Pharmaceutical and Biomedical Analysis, ISSN 0731-7085, E-ISSN 1873-264X, Vol. 39, no 3-4, 730-734 p.Article in journal (Refereed)
    Abstract [en]

    To improve the reliability of microdialysis measurements of tissue concentrations of metabolic substances, this study was designed to test both the performance and the internal validity of the microdialysis methods in the hands of our research group. The stability of the CMA 600 analyser was tested with a known glucose solution in 72 standard microvials and in 48 plastic vials. To evaluate if variation in sampling time makes any difference in sample concentration (recovery), sampling times of 10, 20 and 30 min were compared in vitro with a constant flow rate of 1 microl/min. For testing of sampling times at different flow rates, an in vitro study was performed in which a constant sample volume of 10 microl was obtained. With the no net flux method, the actual concentration of glucose and urea in subcutaneous tissue was measured. The CMA 600 glucose analysis function was accurate and stable with a coefficient of variability (CV) of 0.2-0.55%. There was no difference in recovery for the CMA 60 catheter for glucose when sampling times were varied. Higher flow rates resulted in decreased recovery. Subcutaneous tissue concentrations of glucose and urea were 4.4 mmol/l and 4.1 mmol/l, respectively. To conclude, this work describes an internal validation of our use of the microdialysis system by calibration of vials and catheters. Internal validation is necessary in order to be certain of adequate sampling times, flow rates and sampling volumes. With this in mind, the microdialysis technique is useful and appropriate for in vivo studies on tissue metabolism.

  • 4.
    Abrahamsson, Pernilla
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Åberg, Anna-Maja
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Winsö, Ola
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Johansson, Göran
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Haney, Michael
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Blind, Per-Jonas
    Kirurgi, Skåne Universitets sjukhus, Lund.
    Comparison between outcome of  surface and intraparenchymatous sampling using microdialysis in an experimental liver ischemia modelManuscript (preprint) (Other academic)
    Abstract [en]

    Introduction. We recently have shown that samples from MD probes placed on the surface of the heart reflect metabolic events in the myocardium. This new interesting observation challenges us to consider whether surface application of MD applies to other parenchymatous organs and their surfaces.

    Material and methods.  In thirteen anesthetized pigs transient liver ischemia was achieved by occlusion of arterial and venous inflow to the liver. Two probes on liver surface, and two in parenchyma were perfused with a flow rate of 1 µL/min (n=13). An identical set up was used for probes with a flow rate of 2 µL/min (n=9). Samples were collected for every 15 minute period during 60 minutes of baseline, 45 minutes of ischemia and 60 minutes of reperfusion. Lactate, glucose, pyruvate and glycerol were analysed in MD samples. We focused on relative changes in the present paper.

    Results. There was a strong agreement in relative lactate and glucose levels between probes placed on liver surface and parenchyma. No significant differences in relative changes of lactate and glucose levels were seen between samples from surface probes and probes in liver parenchyma during equilibration, baseline, ischemia or reperfusion with a flow rate of 1 µL/min.

    Conclusion. MD sampling applied on the liver surface is a new application area for the MD technique, and may be used to monitor liver metabolism both during physiological and pathophysiological conditions.

  • 5.
    Acosta, Stefan
    et al.
    Vascular Center, Malmö University Hospital, Malmö, Sweden.
    Block, Tomas
    Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden.
    Björnsson, Steinarr
    Vascular Center, Malmö University Hospital, Malmö, Sweden.
    Resch, Timothy
    Vascular Center, Malmö University Hospital, Malmö, Sweden.
    Björck, Martin
    Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden.
    Nilsson, Torbjörn
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden. Department of Clinical Chemistry, Örebro University Hospital, Örebro, Sweden.
    Diagnostic pitfalls at admission in patients with acute superior mesenteric artery occlusion2012In: Journal of Emergency Medicine, ISSN 0736-4679, E-ISSN 1090-1280, Vol. 42, no 6, 635-641 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Acute superior mesenteric artery (SMA) occlusion leads to acute intestinal ischemia and is associated with high mortality. Early diagnosis is often missed, and confounding factors leading to diagnostic delays need to be highlighted.

    OBJECTIVES: To identify potential diagnostic laboratory pitfalls at admission in patients with acute SMA occlusion.

    METHODS: Fifty-five patients with acute SMA occlusion were identified from the in-hospital register during a 4-year period, 2005-2009.

    RESULTS: The median age was 76 years; 78% were women. The occlusion was embolic in 53% and thrombotic in 47% of patients. At admission, troponin I was above the clinical decision level (> 0.06 μg/L) for acute ischemic myocardial injury in 9/19 (47%) patients with embolic occlusion. Elevated pancreas amylase and normal plasma lactate were found in 12/45 and 13/27, respectively. A troponin I (TnI) above the clinical decision level was associated with a high frequency of referrals from the general surgeon to a specialist in internal medicine (p = 0.011) or a cardiologist (p = 0.024). The diagnosis was established after computed tomography angiography in 98% of the patients. The overall in-hospital mortality rate was 33%. Attempting intestinal revascularization (n = 43; p < 0.001), with a 95% frequency rate of completion control of the vascular procedure, was associated with a higher survival rate, whereas referral to the cardiologist was associated with a higher mortality rate (p = 0.018).

    CONCLUSION: Elevated TnI was common in acute SMA occlusion, and referral to the cardiologist was found to be associated with adverse outcome. Elevated pancreas amylase and normal plasma lactate values are also potential pitfalls at admission in patients with acute SMA occlusion.

  • 6.
    Ahlstrand, Rebecca
    Örebro University, School of Health and Medical Sciences.
    Effects of anasthesia on esophageal sphincters2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The esophageal sphincters constitute the anatomical protection against pulmonary aspiration. The aim of this thesis was to study the esophageal sphincters and how they are affected by different components of emergency anesthesia using high-resolution solid-state manometry.

    The effect of propofol (0.3 mg/kg) was studied in young and elderly volunteers. Propofol can be given as an anxiolytic agent for manometric studies of the lower esophageal sphincter (LES) without affecting the results. However, propofol is not recommended for studies of the upper esophageal sphincter (UES).

    The effects of cricoid pressure (CP) and peripheral pain were studied in awake volunteers, with and without remifentanil infusion (5 ng/ml). Pain did not affect pressure in the LES, but CP or remifentanil induced a significant decrease in LES pressure. However, neither CP nor remifentanil affected the barrier pressure (LES-intra gastric pressure). When CP was applied during ongoing remifentanil infusion, no further decrease in LES pressure was measured. CP induced high pressures in the area of the UES independent of remifentanil infusion, indicating that CP is effective in preventing gastroesophageal regurgitation.

    Barrier pressure was also studied in anesthetized patients after rocuronium (0.6 mg/kg) administration and no decrease was measured. In addition, alfentanil (20 μ/kg) added during anesthesia induction with propofol did not decrease the barrier pressure.

    In conclusion, CP seems to be effective in preventing regurgitation and does not affect barrier pressure. Muscle relaxation with rocuronium does not risk gastro-esophageal integrity. In addition, opioids can be integrated, even during emergency anethesia, without increasing the risk for pulmonary aspiration.

  • 7.
    Ahlstrand, Rebecca
    et al.
    Örebro University, School of Health and Medical Sciences.
    Magnuson, Anders
    Thörn, Sven-Egron
    Dahlkvist, Anette
    Wattvil, Magnus
    Integrity of the esophagogastric junction during propofol induction with and without remifentanil: a double-blind,randomized, crossover study in volunteersManuscript (preprint) (Other academic)
    Abstract [en]

    Context: Practice varies regarding the use of opioids during rapid sequence induction. Controversy exists as to whether opioids may increase the risk of pulmonary aspiration by decreasing the barrier pressure (lower oesophageal sphincter pressure – intragastric pressure).

    Objectives: To evaluate the effects of adding alfentanil during anaesthesia induction with propofol with respect to the barrier pressure in the oesophagogastric junction.

    Participants and Setting: Seventeen healthy volunteers (11 males and 6 females) participated in a double-blind, randomised, crossover trial at the University Hospital in Örebro, Sweden.

    Interventions and outcome measures: The volunteers were anaesthetised on two different occasions, randomly assigned to receive either alfentanil 20 g kg ˉ1 or an equivalent amount of saline, administered intravenously, one minute before induction with propofol 2 mg kg ˉ1. One minute after propofol administration, a cricoid pressure of 30N was applied. The primary outcome was the difference in the change in barrier pressure between the alfentanil and the placebo occasion one minute after propofol administration. The secondary outcomes were differences in the changes in barrier pressure one minute after alfentanil or placebo administration and during ongoing cricoid pressure application.

    Results: There were no statistically significant differences in barrier pressure, at any time point, between anaesthesia induction with alfentanil and propofol compared with induction with placebo and propofol. The barrier pressure never decreased to less than 2.4 mmHg in any volunteer.

    Conclusion: Our study showed no increased risk regarding the integrity of the gastrooesophageal junction when alfentanil is added during an induction with propofol in volunteers. This supports the practice of adding opioids as adjuvants during rapid sequence induction.

  • 8.
    Ahlstrand, Rebecca
    et al.
    Örebro University, School of Health and Medical Sciences.
    Savilampi, J.
    Thörn, Sven-Egron
    Wattwil, Magnus
    Effects of cricoid pressure and remifentanil on the esophageal sphincters using high-resolution solid-state manometry2011In: Acta Anaesthesiologica Scandinavica, ISSN 0001-5172, E-ISSN 1399-6576, Vol. 55, no 2, 209-215 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND:

    Cricoid pressure has been shown to decrease the pressure in the lower esophageal sphincter (LES), increasing the risk of aspiration. Whether this reaction is due to pain associated with the application of cricoid pressure has not been studied. The aim of this study was to compare the effects of cricoid pressure with those of peripheral pain on pressures in the LES, and to study whether remifentanil influences these effects. Data from the upper esophageal sphincter (UES) are also described.

    METHODS:

    Continuous solid-state manometry was performed in 14 healthy volunteers. Initially, the effect of remifentanil (target-controlled infusion with a plasma target concentration of 5.0 ng/ml) was studied, and thereafter, the effects of cricoid pressure and peripheral pain stimulation (cold stimulation). Finally, these two interventions were repeated under ongoing remifentanil infusion.

    RESULTS:

    Remifentanil decreased the LES pressure significantly [ΔP-6.5 mmHg, 95% confidence interval (95% CI) -1.7 to -11.2]. Cricoid pressure application decreased the LES pressure significantly (ΔP-3.7 mmHg, 95% CI -1.4 to 6.1), whereas peripheral pain did not (ΔP 1.2 mmHg, 95% CI -3.5 to 1.1). Under ongoing remifentanil infusion, no cricoid pressure-induced LES relaxation was observed. Cricoid pressure induced high pressures in the area of the UES, 215.7 (±91.2) mmHg without remifentanil vs. 219.4 (±74.2) mmHg with remifentanil.

    CONCLUSIONS:

    Remifentanil as well as cricoid pressure per se induced decreases in LES pressure. However, cricoid pressure-induced changes of the barrier pressure were not significant whether induced with or without an infusion of remifentanil.

  • 9.
    Ahlstrand, Rebecca
    et al.
    Örebro University, School of Health and Medical Sciences.
    Thörn, Sven-Egron
    Wattvil, Magnus
    High resolution solid-state manometry of the effect of rocuronium on esophagogastric junction integrityManuscript (preprint) (Other academic)
    Abstract [en]

    Background: The pressure in the lower esophageal sphincter (LES) is partly dependent on striated muscles derived from the crural portion of the diaphragm. The effect of neuromuscular blockade on the integrity of the esophagogastric junction is not well studied. We conducted a prospective interventional study to determine the effect of rocuronium on the pressure in the LES and the barrier pressure (LES pressure – intra gastric pressure). We also studied the effect of positive pressure ventilation on the barrier pressure after neuromuscular blockade with rocuronium.

    Methods: Fourteen patients classified as ASA I or II (aged 18-75 years) who presented for elective surgery (11 cholecystectomy, 3 inguinal hernia) participated in the study. Esophageal manometry was performed after anesthetization with propofol, fentanyl and sevoflurane. After the insertion of a laryngeal mask airway, the patients breathed spontaneously for one minute. Rocuronium was administrated and the patients observed during the onset of apnea and during one minute of apnea and complete neuromuscular blockade. Volume controlled positive pressure ventilation followed.

    Results: Muscle relaxation with rocuronium showed no significant changes in barrier pressure comparing the pressure immediately before rocuronium administration with the pressure obtained at the time point of 0% TOF. Conversion to positive pressure ventilation did not change the barrier pressure with inspiration or expiration. The greatest decrease in barrier pressure was measured after inducing anesthesia when comparing pressures during inspiration (P< 0.01)

  • 10.
    Ahlström, Katarina
    et al.
    Anesthesia and Intensive Care Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Biber, Björn
    Anesthesia and Intensive Care Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Åberg, Anna-Maja
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Abrahamsson, Pernilla
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Johansson, Göran
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Ronquist, Gunnar
    Department of Medical Chemistry, Uppsala University, Uppsala, Sweden.
    Waldenström, Anders
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Cardiology.
    Haney, Michael F.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Exogenous carbon monoxide does not affect cell membrane energy availability assessed by sarcolemmal calcium fluxes during myocardial ischaemia-reperfusion in the pig2011In: European Journal of Anaesthesiology, ISSN 0265-0215, E-ISSN 1365-2346, Vol. 28, no 5, 356-362 p.Article in journal (Refereed)
    Abstract [en]

    Carbon monoxide is thought to be cytoprotective and may hold therapeutic promise for mitigating ischaemic injury. The purpose of this study was to test low-dose carbon monoxide for protective effects in a porcine model of acute myocardial ischaemia and reperfusion.In acute open-thorax experiments in anaesthetised pigs, pretreatment with low-dose carbon monoxide (5% increase in carboxyhaemoglobin) was conducted for 120 min before localised ischaemia (45 min) and reperfusion (60 min) was performed using a coronary snare. Metabolic and injury markers were collected by microdialysis sampling in the ventricular wall. Recovery of radio-marked calcium delivered locally by microperfusate was measured to assess carbon monoxide treatment effects during ischaemia/reperfusion on the intracellular calcium pool.Coronary occlusion and ischaemia/reperfusion were analysed for 16 animals (eight in each group). Changes in glucose, lactate and pyruvate from the ischaemic area were observed during ischaemia and reperfusion interventions, though there was no difference between carbon monoxide-treated and control groups during ischaemia or reperfusion. Similar results were observed for glycerol and microdialysate Ca recovery.These findings show that a relatively low and clinically relevant dose of carbon monoxide did not seem to provide acute protection as indicated by metabolic, energy-related and injury markers in a porcine myocardial ischaemia/reperfusion experimental model. We conclude that protective effects of carbon monoxide related to ischaemia/reperfusion either require higher doses of carbon monoxide or occur later after reperfusion than the immediate time frame studied here. More study is needed to characterise the mechanism and time frame of carbon monoxide-related cytoprotection.

  • 11.
    Akerlund, Emma
    et al.
    Inst för Experimentell och Klinisk medicin, Linköping.
    Huss, Fredrik R M
    Inst för Experimentell och Klinisk medicin, Linköping.
    Sjöberg, Folke
    Inst för Experimentell och Klinisk medicin, Linköping.
    Burns in Sweden: an analysis of 24,538 cases during the period 1987-2004.2007In: Burns, ISSN 0305-4179, E-ISSN 1879-1409, Vol. 33, no 1, 31-6 p.Article in journal (Refereed)
    Abstract [en]

    Burn care is always progressing, but there is little epidemiological information giving a clear picture of the current number of treated burns in Sweden. This study was conducted to provide an update of patients admitted to hospital with burns in Sweden. Data were obtained for all patients who were admitted to hospitals with a primary or secondary diagnosis of burns (ICD-9/10 codes) from 1 January 1987 to 31 December 2004; 24,538 patients were found. Most of the patients were male (69%), giving a male:female ratio of 2.23:1. Children in the age-group 0-4 years old predominated, and accounted for 27% of the study material. The median length of stay was 3 days. Throughout the period 740 patients (3%) died of their burns. Significant reductions in mortality, incidence, and length of stay were seen during the study, which correlates well with other studies. However, most of the reductions were in the younger age-groups. Men accounted for the improved mortality, as female mortality did not change significantly. We think that the improvement in results among patients admitted to hospital after burns is a combination of preventive measures, improved treatment protocols, and an expanding strategy by which burned patients are treated as outpatients.

  • 12.
    Al Dabbagh, Z.
    et al.
    Department of Molecular Medicine and Surgery, Section of Orthopaedics and Sports Medicine, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden.
    Jansson, K. Å.
    Department of Molecular Medicine and Surgery, Section of Orthopaedics and Sports Medicine, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden.
    Stiller, C. O.
    Department of Medicine, Clinical Pharmacology Unit, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden.
    Montgomery, Scott
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden. Department of Clinical Epidemiology and Biostatistics; Clinical Epidemiology Unit, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden; Department of Epidemiology and Public Health, University College London, London, UK.
    Weiss, R. J.
    Department of Molecular Medicine and Surgery, Section of Orthopaedics and Sports Medicine, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden.
    Long-term pattern of opioid prescriptions after femoral shaft fractures2016In: Acta Anaesthesiologica Scandinavica, ISSN 0001-5172, E-ISSN 1399-6576, Vol. 60, no 5, 634-641 p.Article in journal (Refereed)
    Abstract [en]

    Background: The use of opioids in non-cancer-related pain following skeletal trauma is controversial due to the presumed risk of dose escalation and dependence. We therefore examined the pattern of opioid prescriptions, that is, those actually dispensed, in patients with femoral shaft fractures.

    Methods: We analysed data from the Swedish National Hospital Discharge Register and the Swedish Prescribed Drug Register between 2005 and 2008.

    Results: We identified 1471 patients with isolated femoral shaft fractures. The median age was 75 (16-102) years and 56% were female. In this cohort, 891 patients (61%) received dispensed opioid prescriptions during a median follow-up of 20 months (interquartile range 11-32). In the age- and sex-matched comparison cohort (7339 individuals) without fracture, 25% had opioid prescriptions dispensed during the same period. The proportions of patients receiving opioid analgesics at 6 and 12 months after the fracture were 45% (95% CI 42-49) and 36% (32-39), respectively. The median daily morphine equivalent dose (MED) was between 15 and 17 mg 1-12 months post-fracture. After 3 months, less than 5% used prescription doses higher than 20 mg MED per day. Older age (≥ 70 compared with < 70 years) was a significant predictor of earlier discontinuation of opioid use (Hazard ratio [HR] 1.9).

    Conclusion: A notable proportion of patients continued to receive dispensed prescriptions for opioids for over 6 months (45%) and more than a third of them (36%) continued treatment for at least 12 months. However, the risk of dose escalation seems to be small in opioid-naïve patients.

  • 13.
    Al Dabbagh, Zewar
    et al.
    Karolinska Univ Hosp, Karolinska Inst, Dept Mol Med & Surg, Sect Orthopaed & Sports Med, Stockholm, Sweden.
    Jansson, Karl-Åke
    Karolinska Univ Hosp, Karolinska Inst, Dept Mol Med & Surg, Sect Orthopaed & Sports Med, Stockholm, Sweden.
    Stiller, Carl-Olav
    Karolinska Univ Hosp, Karolinska Inst, Dept Med, Clin Pharmacol Unit, Stockholm, Sweden.
    Montgomery, Scott
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden. Orebro University Hospital. Karolinska Univ Hosp, Karolinska Inst, Dept Med, Clin Epidemiol Unit, S-17176 Stockholm, Sweden; UCL, Dept Epidemiol & Publ Hlth, London, England .
    Weiss, Rudiger J.
    Karolinska Univ Hosp, Karolinska Inst, Dept Mol Med & Surg, Sect Orthopaed & Sports Med, Stockholm, Sweden.
    No signs of dose escalations of potent opioids prescribed after tibial shaft fractures: a study of Swedish National Registries2014In: BMC Anesthesiology, ISSN 1471-2253, E-ISSN 1471-2253, Vol. 14, 4- p.Article in journal (Refereed)
    Abstract [en]

    Background: The pattern of opioid use after skeletal trauma is a neglected topic in pain medicine. The purpose of this study was to analyse the long-term prescriptions of potent opioids among patients with tibial shaft fractures.

    Methods: Data were extracted from the Swedish National Hospital Discharge Register, the National Pharmacy Register, and the Total Population Register, and analysed accordingly. The study period was 2005-2008.

    Results: We identified 2,571 patients with isolated tibial shaft fractures. Of these, 639 (25%) collected a prescription for opioids after the fracture. The median follow-up time was 17 (interquartile range [IQR] 7-27) months. Most patients with opioid prescriptions after fracture were male (61%) and the median age was 45 (16-97) years. The leading mechanism of injury was fall on the same level (41%). At 6 and 12 months after fracture, 21% (95% CI 17-24) and 14% (11-17) were still being treated with opioids. Multiple Cox regression-analysis (adjusted for age, sex, type of treatment, and mechanism of injury) revealed that older patients (age >50 years) were more likely to end opioid prescriptions (Hazard ratio 1.5 [95% CI 1.3-1.9]). During follow-up, the frequency of patients on moderate and high doses declined. Comparison of the daily morphine equivalent dose among individuals who both had prescriptions during the first 3 months and the 6th month indicated that the majority of these patients (11/14) did not have dose escalations.

    Conclusions: We did not see any signs in registry-data of major dose escalations over time in patients on potent opioids after tibial shaft fractures.

  • 14.
    Alkaissi, Aidah
    Linköping University, Department of Medicine and Health Sciences, Anesthesiology . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Anaesthesiology and Surgical Centre, Department of Intensive Care UHL.
    Postoperative Symptoms After Gynaecological Surgery: How They Are Influenced by Prophylactic Antiemetics Sensory Stimulation (P6-Acupressure)2004Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Symptoms after surgery and anaesthesia influence the patient´s ability to resume daily activities. If postoperative symptoms are controlled rehabilitation may be accelerated. The aims of this dissertation were to identify disturbing symptoms reported by patients after gynaecological surgery, to investigate what effect prohylactic treatment with antiemetics has on these symptoms and whether or not sensory simulation of the P6-acupressure has an effect on postoperative nausea and vomiting (PONV) and motion sickness.

    Methods: Total 1138 women participated in three clinical trials (Studies I, II, III) and one experimental study (Study IV). A questionnaire investigating postoperative symptoms was constructed and validated. The questionnaire was used in a prospective, consecutive, doubleblind, randomised, multicentre, and controlled study to identify incidence, and intensity of postoperative symptoms and the effect of common antiemetics (droperidol and granisetron) (Study III). The patients were followed for 24 h. In two studies (I, II) P6-acupressure was compared (prospective, double-blind, ransomised, controlled) with placebo acupressure and a reference group where the effect on PONV was followed over 24 h. The effect of P6-acupressure and placebo acupressure on motion sickness induced by a nauseogenic motion challenge was studied (Study III).

    Results: A high incidence and severity of postoperative symptoms were found after gynaecological surgery in a group with a high risk (>30%) for PONV. Sixty-four per cent (107/165) of the patients experienced disturbing symptoms after surgery and 46 % (76/165) scored their symptoms as moderate to very severe. Fourty-eight per cent (79/165) had two or more symptoms. A higher incidence of symptoms were reported in the groups with prophylactic treatment, granisetron 74% (123/165) and droperidol 80% (133/165) compared to the control group 41% (69/165) (P <0.05). The relative risk reduction for PONV with granisetron or droperidol prophylaxis is 27% respective 22%. The relative risk increase for headache is 63% after granisetron, and 44% for difficulty with accommodation after droperidol. Less PONV was seen after P6-acupressure, 33% (44/135) compared to reference group 46% (63/136) (p = 0.019), number needed to treat (NNT) was 7 [95% confidence interval (CI) 4- 6]. When comparing laparoscopic and vaginal surgery (subgroup analysis) the main effect was in the vaginal group (day-case surgery), 36% (27/75) in the reference group to 27% (23/86) in the placebo group and to 20% (17/84) in the P6-acupressure group, (P = 0.017), NNT for the vaginal group was 6 [95% CI 3-18]. P6-acupressure increased time to nausea after a laboratory motion challenge and reduced the total number of symptoms reported (p <0.009).

    Conclusions: There is no clinical efficacy in the form of reduced postoperative symptoms after prophylactic antiemetics (droperidol and granisetron) in females with a high risk (>30%) for PONV undergoing gynaecological surgery. P6-acupressure reduces the incidence of PONV after gynaecological surgery in females with a high (>30%) risk for PONV. The effect seems to be most prominent after vaginal surgery. P6-acupressure increased tolerance to experimental nausogenic stimuli and reduced the total number of symptoms reported in females with a history of motion sickness.

  • 15.
    Allisson, Anna
    Halmstad University, School of Social and Health Sciences (HOS).
    När återhämtar patienten sig snabbast?: Jämförlse mellan inhalationsanestesi och total intravenös anestesi.2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    General anesthesia includes both inhalations anesthesia and total intravenous anesthesia (TIVA). After any anesthetic technique a de sirable characteristics is a predictably rapid emergence and sustained alertness. There is a clinical and scientific debate about which anesthetic technique who gives the most rapid emergence in the early postoperative recovery. The aim of this study was to compare patients early postoperative recovery after inhalations anesthesia and after total intravenous anesthesia (TIVA). The methods are based on 15 research articles. They where analysized from the questionnaire: which anesthetic technique gives the most rapid emergence in the early postoperative recovery. The results showed that inhalations anesthesia gave the most rapid emergence in the earky postoperative recovery. The nurse anesthetist handling, planning and experience affect the patients awakening. Therefore further research instead could compare these anesthetic techniques in another way. The time after the nurse anesthetist has extubate the patient until the patient is adequate orientated, could be measured to find a more comparable result.

  • 16.
    Alm, Fredrik
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden.
    Hälsorisker för personal i operationsrum som yrkesexponeras för anestesigaser2011Independent thesis Advanced level (professional degree), 5 credits / 7,5 HE creditsStudent thesis
  • 17.
    Alm, Fredrik
    et al.
    Örebro University, School of Health Sciences. Department of Anaesthesia and Intensive Care.
    Stalfors, Joacim
    Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Sheikh Khalifa Medical City, Ajman, United Arab Emirates.
    Nerfeldt, Pia
    Department of Otorhinolaryngology, Karolinska University Hospital, Stockholm, Sweden; Division of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden.
    Ericsson, Elisabeth
    Örebro University, School of Health Sciences.
    Patient reported pain-related outcome measures after tonsil surgery: an analysis of 32,225 children from the National Tonsil Surgery Register in Sweden 2009–20162017In: European Archives of Oto-Rhino-Laryngology, ISSN 0937-4477, E-ISSN 1434-4726, Vol. 274, no 10, 3711-3722 p.Article in journal (Refereed)
    Abstract [en]

    The objective of this study was to describe factors affecting pain after pediatric tonsil surgery, using patient reported pain-related outcome measures (pain-PROMs) from the National Tonsil Surgery Register in Sweden. In total, 32,225 tonsil surgeries on children (1 to\18 years) during 2009–2016 were included; 13,904 tonsillectomies with or without adenoidectomy (TE ± A), and 18,321 tonsillotomies with or without adenoidectomy (TT ± A). Adjustments were made for variables included in the register to compensate for contributable factors in the analysis. When compared to TE ± A for surgical indication obstruction, TT ± A resulted in lower pain-PROMs, shorter use of postoperative analgesics, earlier return to regular food intake, and lower risk for contact with health care services due to pain. Children who underwent TE ± A because of obstruction problems stopped taking painkillers and returned to normal eating habits sooner, compared to children who underwent TE ± A for infectious indications. In both indication groups, TE ± A performed with hot rather than cold technique (dissection and haemostasis) generally resulted in higher pain-PROMs. Older children reported more days on analgesics and a later return to regular food intake after TE ± A than younger ones. No clinically relevant difference between sexes was found. Between 2012 and 2016 (pre-and post-implementation of Swedish national guidelines for pain treatment), the mean duration of postoperative analgesic use had increased. In conclusion, TE ± A caused considerably higher ratings of pain-related outcome measures, compared to TT ± A. For TE ± A, cold surgical techniques (dissection and haemostasis) were superior to hot techniques in terms of pain-PROMs. Older children reported higher pain-PROMs after TE ± A than younger ones.

  • 18. Almerud, S
    et al.
    Alapack, R.J.
    Fridlund, Bengt
    Växjö University.
    Ekebergh, Margaretha
    Växjö University.
    Beleuguered by technology: Care in technologically intense environments2008In: Nursing Philosophy, ISSN 1466-7681, E-ISSN 1466-769X, Vol. 9, no 1, 55-61 p.Article in journal (Refereed)
    Abstract [en]

    Modern technology has enabled the use of new forms of information in the care of critically ill patients. In intensive care units (ICUs), technology can simultaneously reduce the lived experience of illness and magnify the objective dimensions of patient care. The aim of this study, based upon two empirical studies, is to find from a philosophical point of view a more comprehensive understanding for the dominance of technology within intensive care. Along with caring for critically ill patients, technology is part of the ICU staff's everyday life. Both technology and caring relationships are of indispensable value. Tools are useful, but technology can never replace the closeness and empathy of the human touch. It is a question of harmonizing the demands of subjectivity with objective signs. The challenge for caregivers in ICU is to know when to heighten the importance of the objective and measurable dimensions provided by technology and when to magnify the patients’ lived experiences, and to live and deal with the ambiguity of the technical dimension of care and the human side of nursing.

  • 19. Almerud, S
    et al.
    Alapack, R.J.
    Fridlund, Bengt
    Växjö University.
    Ekebergh, Margaretha
    Växjö University.
    Of vigilance and invisibility: being a patient in technologically intense environments2007In: Nursing in Critical Care, ISSN 1362-1017, E-ISSN 1478-5153, Vol. 12, no 3, 151-158 p.Article in journal (Refereed)
    Abstract [en]

    Equipment and procedures developed during the past several decades have made the modern intensive care unit (ICU) the hospital’s most technologically advanced environment. In terms of patient care, are these advances unmitigated gains? This study aimed to develop a knowledge base of what it means to be critically ill or injured and cared for in technologically intense environments. A lifeworld perspective guided the investigation. Nine unstructured interviews with intensive care patients comprise its data. The qualitative picture uncovered by a phenomenological analysis shows that contradiction and ambivalence characterized the entire care episode. The threat of death overshadows everything and perforates the patient’s existence. Four inter-related constituents further elucidated the patients’ experiences: the confrontation with death, the encounter with forced dependency, an incomprehensible environment and the ambiguity of being an object of clinical vigilance but invisible at the personal level. Neglect of these issues lead to alienating ‘moments’ that compromised care. Fixed at the end of a one-eyed clinical gaze, patients described feeling marginalized, subjected to rituals of power, a stranger cared for by a stranger. The roar of technology silences the shifting needs of ill people, muffles the whispers of death and compromises the competence of the caregivers. This study challenges today’s caregiving system to develop double vision that would balance clinical competence with a holistic, integrated and comprehensive approach to care. Under such vision, subjectivity and objectivity would be equally honoured, and the broken bonds re-forged between techne, ‘the act of nursing’, and poesis, ‘the art of nursing’.

  • 20.
    Alström, Ulrica
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences.
    Platelet Inhibition and Bleeding in Coronary Artery Bypass Surgery2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    A substantial number of patients undergoing cardiac surgery are on dual anti-platelet treatment with clopidogrel and aspirin. A disadvantage with this treatment is increased risk of bleeding. Bleeding is a complication of major concern associated with adverse outcome for the patient and increased hospital resource utilization. Great variability in individual response to clopidogrel has been reported. If in vitro measurements of platelet reactivity would correlate with clinical bleeding parameters, potential bleeders could be identified preoperatively.

    The aims of this thesis were: (1) to describe the degree of pre-operative platelet inhibition in patients scheduled for primary isolated coronary artery bypass graft surgery; (2) to prospectively investigate whether the pre-operative platelet inhibition correlated with intra- and postoperative bleeding and transfusion requirements; and (3) to test the ability of clinically relevant risk factors to predict re-exploration for bleeding. (4) In addition, a cost analysis was performed on patients re-explored for bleeding, to analyse the magnitude of added resource utilization and costs. Based on this, a cost model of prophylactic treatment with haemostatic drugs was calculated.

    Platelet function tests investigated were: (1) flow cytometry, (2) VASP, (3) VerifyNowSystem, (4) PlateletMapping (a modified TEG), and (5) PFA-100.

    Clinical risk factors for re-exploration and the influence of antiplatelet and antifibrinolytic therapy were evaluated in a retrospective analysis. Cost analysis at three cardiothoracic centres was performed in a case-control study.

    In conclusion, there was no clinically useful correlation between preoperative assessment of platelet inhibition and blood loss or transfusion requirements during coronary artery bypass surgery. Furthermore, there was only modest agreement between the methods evaluating ADP-receptor blockade.

    Pre-operative treatment with the P2Y12-receptor inhibitor clopidogrel was an essential risk factor for re-exploration due to bleeding. Except for clopidogrel, no strong clinical factor to predict the risk of re-exploration was identified.

    The resource utilisation costs were 47% higher in patients requiring re-exploration due to bleeding than in those not requiring re-exploration. Prolonged stay in the ICU and recovery ward accounted for half of the added cost, a third was due to the costs of surgery, one fifth due to increased cost of transfusions, and <2% was due to haemostatic drug treatment.

     

     

  • 21.
    Anand, K J S
    et al.
    Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA; Department of Anestheslogy, Neurobiology, and Pharmacology, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
    Hall, R Whit
    Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
    Desai, Nirmala
    Department of Pediatrics, University of Kentucky Medical Center, Lexington, KY.
    Shephard, Barbara
    Department of Pediatrics, Tufts University School of Medicine, Boston, MA.
    Bergqvist, Lena L
    Neonatal Research Unit, Karolinska Institute, Astrid Lindgren's Children's Hospital, Stockholm, Sweden.
    Young, Thomas E
    Department of Pediatrics, University of North Carolina at Chapel Hill and Wake Medical Center, Raleigh, NC, USA.
    Boyle, Elaine M
    Simpson Memorial Maternity Pavilion, University of Edinburgh, Edinburgh, UK.
    Carbajal, Ricardo
    Service de Pédiatrie et Médecine Néonatale, Centre Hospitaller Poissy Saint Germain, Poissy, France.
    Bhutani, Vinod K
    Department of Pediatrics, University of Pennsylvania and Pennsylvania Hospital, Philadelphia, PA, USA.
    Moore, Mary Beth
    Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
    Kronsberg, Shari S
    Maryland Medical Research Institute, Baltimore, MD.
    Barton, Bruce A
    Maryland Medical Research Institute, Baltimore, MD.
    Effects of morphine analgesia in ventilated preterm neonates: primary outcomes from the NEOPAIN randomised trial2004In: The Lancet, ISSN 0140-6736, E-ISSN 1474-547X, Vol. 363, no 9422, 1673-82 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Opioid analgesia is commonly used during neonatal intensive care. We undertook the Neurologic Outcomes and Pre-emptive Analgesia in Neonates (NEOPAIN) trial to investigate whether pre-emptive morphine analgesia decreases the rate of a composite primary outcome of neonatal death, severe intraventricular haemorrhage (IVH), and periventricular leucomalacia (PVL) in preterm neonates.

    METHODS: Ventilated preterm neonates (n=898) from 16 centres were randomly assigned masked placebo (n=449) or morphine (n=449) infusions. After a loading dose (100 microg/kg), morphine infusions (23-26 weeks of gestation 10 microg kg(-1) h(-1); 27-29 weeks 20 microg kg(-1) h(-1); 30-32 weeks 30 microg kg(-1) h(-1)) were continued as long as clinically justified (maximum 14 days). Open-label morphine could be given on clinical judgment (placebo group 242/443 [54.6%], morphine group 202/446 [45.3%]). Analyses were by intention to treat.

    FINDINGS: Baseline variables were similar in the randomised groups. The placebo and morphine groups had similar rates of the composite outcome (105/408 [26%] vs 115/419 [27%]), neonatal death (47/449 [11%] vs 58/449 [13%]), severe IVH (46/429 [11%] vs 55/411 [13%]), and PVL (34/367 [9%] vs 27/367 [7%]). For neonates who were not given open-label morphine, rates of the composite outcome (53/225 [24%] vs 27/179 [15%], p=0.0338) and severe IVH (19/219 [9%] vs 6/189 [3%], p=0.0209) were higher in the morphine group than the placebo group. Placebo-group neonates receiving open-label morphine had worse rates of the composite outcome than those not receiving open-label morphine (78/228 [34%] vs 27/179 [15%], p<0.0001). Morphine-group neonates receiving open-label morphine were more likely to develop severe IVH (36/190 [19%] vs 19/219 [9%], p=0.0024).

    INTERPRETATION: Pre-emptive morphine infusions did not reduce the frequency of severe IVH, PVL, or death in ventilated preterm neonates, but intermittent boluses of open-label morphine were associated with an increased rate of the composite outcome. The morphine doses used in this study decrease clinical signs of pain but can cause significant adverse effects in ventilated preterm neonates.

  • 22.
    Ander, Fredrik
    et al.
    Örebro University, School of Medical Sciences. Department of Anesthesiology and Intensive Care.
    Magnuson, Anders
    Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden.
    Berggren, Lars
    Department of Anesthesiology and Intensive Care, School of Medical Sciences, Örebro University, Örebro, Sweden.
    Ahlstrand, Rebecca
    Örebro University, School of Medical Sciences. Örebro University Hospital. Department of Anesthesiology and Intensive Care.
    de Leon, Alex
    Department of Anesthesiology and Intensive Care, School of Medical Sciences, Örebro University, Örebro, Sweden.
    Effects of Esmolol on the Esophagogastric Junction: A Double-Blind, Randomized, Crossover Study on 14 Healthy Volunteers2017In: Anesthesia and Analgesia, ISSN 0003-2999, E-ISSN 1526-7598, Vol. 125, no 4, 1184-1190 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Passive regurgitation may occur throughout the perioperative period, increasing the risk for pulmonary aspiration and postoperative pulmonary complications. Hypnotics and opioids, especially remifentanil, that are used during anesthesia have been shown to decrease the pressure in the esophagogastric junction (EGJ), that otherwise acts as a barrier against passive regurgitation of gastric contents. Esmolol, usually used to counteract tachycardia and hypertension, has been shown to possess properties useful during general anesthesia. Like remifentanil, the beta-1-adrenoreceptor antagonist may be used to attenuate the stress reaction to tracheal intubation and to modify perioperative anesthetic requirements. It may also reduce the need for opioids in the postoperative period. Its action on the EGJ is however unknown. The aim of this trial was to compare the effects of esmolol and remifentanil on EGJ pressures in healthy volunteers, when administrated as single drugs.

    METHODS: Measurements of EGJ pressures were made in 14 healthy volunteers using high resolution solid-state manometry. Interventions were administered in a randomized sequence and consisted of esmolol that was given IV as a bolus dose of 1 mg/kg followed by an infusion of 10 mu g.kg(-1).minute(-1) over 15 minutes, and remifentanil with target-controlled infusion of 4 ng/mL over 15 minutes. Interventions were separated by a 20-minute washout period. Analyses of EGJ pressures were performed at baseline, and during drug administration at 2 (T2) and 15 minutes (T15). The primary outcome was the inspiratory EGJ augmentation, while the inspiratory and expiratory EGJ pressures were secondary outcomes.

    RESULTS: There was no effect on inspiratory EGJ augmentation when comparing remifentanil and esmolol (mean difference -4.0 mm Hg [-9.7 to 1.7]; P = .15). In contrast, remifentanil significantly decreased both inspiratory and expiratory pressures compared to esmolol (-12.2 [-18.6 to 5.7]; P = .003 and 8.0 [-13.3 to 2.8]; P = .006).

    CONCLUSIONS: Esmolol, compared with remifentanil, does not affect EGJ function. This may be an advantage regarding passive regurgitation and esmolol may thus have a role to play in anesthesia where maintenance of EGJ barrier function is of outmost importance.

  • 23.
    Ander, Fredrik
    et al.
    Örebro University, School of Medical Sciences. Orebro University Hospital. Department of Anaesthesia and Intensive Care, School of Medical Sciences, Örebro University, Örebro, Sweden.
    Magnuson, Anders
    Orebro University Hospital. Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden.
    Berggren, Lars
    Örebro University, School of Health Sciences. Orebro University Hospital. Department of Anaesthesia and Intensive Care, School of Medical Sciences, Örebro University, Örebro, Sweden.
    Ahlstrand, Rebecca
    Örebro University, School of Medical Sciences. Department of Anaesthesia and Intensive Care, School of Medical Sciences, Örebro University, Örebro, Sweden.
    de Leon, Alex
    Örebro University, School of Medical Sciences. Örebro University, School of Health and Medical Sciences.
    Time-to-intubation in obese patients. A randomized study comparing direct laryngoscopy and videolaryngoscopy in experienced anaesthetists.2017In: Minerva Anestesiologica, ISSN 0375-9393, E-ISSN 1827-1596Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Airway management may be difficult in obese patients. Moreover, during prolonged intubation, oxygen desaturation develops rapidly. Videolaryngoscopy improves the view of the larynx, and the Storz® C-MACTM has been shown to be superior to other videolaryngoscopes in terms of intubation time in obese patients. However, no effort has been made to compare the Storz® C-MACTM with direct laryngoscopy. The aim of the study was to evaluate if the use of Storz® C-MACTM may reduce intubation time when compared to direct laryngoscopy (classic Macintosh® blade).

    METHODS: eighty patients with body mass index > 35kg/m2 were randomized to orotracheal intubation using either Macintosh® laryngoscope, or the Storz® C-MACTM with the standard Macintosh blade. Patients had no previous history of a difficult airway. Time- to-intubation (TTI) was defined as the time from the moment anaesthetist took the laryngoscope until end-tidal carbon dioxide was detected.

    RESULTS: no significant difference in TTI could be demonstrated between the two devices tested (mean difference -1.7s (95% CI -6.9 to 3.5s). All patients in the videolaryngoscopy group were successfully intubated with the allocated device, whereas five patients in the direct laryngoscopy group required an alternative device for successful intubation. No significant difference regarding the subjective difficulty of intubation and postoperative sore throat between groups was demonstrated.

    CONCLUSION: in obese patients the airway may be secured equally fast using direct laryngoscopy (Macintosh®) and with videolaryngoscopy using the Stortz® C-MACTM. The risk for failed intubation, however, appears to be greater with direct laryngoscopy, especially in male obese patients.

  • 24.
    Andersson, Hanna
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Anaesthesiology and Intensive Care.
    Zarén, Björn
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Anaesthesiology and Intensive Care.
    Frykholm, Peter
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Anaesthesiology and Intensive Care.
    Low incidence of pulmonary aspiration in children allowed intake of clear fluids until called to the operating suite2015In: Pediatric Anaesthesia, ISSN 1155-5645, E-ISSN 1460-9592, Vol. 25, no 8, 770-777 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: International guidelines recommend 2 h of clear fluid fasting prior to general anesthesia. The pediatric anesthesia unit of Uppsala University Hospital has been implementing a more liberal fasting regime for more than a decade; thus, children scheduled for elective procedures are allowed to drink clear fluids until called to the operating suite.

    AIM: To determine the incidence of perioperative pulmonary aspiration in pediatric patients allowed unlimited intake of clear fluids prior to general anesthesia.

    METHOD: Elective pediatric procedures between January 2008 and December 2013 were examined retrospectively by reviewing anesthesia charts and discharge notes in the electronic medical record system. All notes from the care event and available chest x-rays were examined for cases showing vomiting, regurgitation, and/or aspiration. Pulmonary aspiration was defined as radiological findings consistent with aspiration and/or postoperative symptoms of respiratory distress after vomiting during anesthesia.

    RESULTS: Of the 10 015 pediatric anesthetics included, aspiration occurred in three (0.03% or 3 in 10 000) cases. No case required cancellation of the surgical procedure, intensive care or ventilation support, and no deaths attributable to aspiration were found. Pulmonary aspiration was suspected, but not confirmed by radiology or continuing symptoms, in an additional 14 cases.

    CONCLUSION: Shortened fasting times may improve the perioperative experience for parents and children with a low risk of aspiration.

  • 25.
    Andersson, Ingemar
    Kristianstad University, School of Health and Society.
    Långvarig smärta - en introduktion2010In: Smärta och smärtbehandling / [ed] Mads Werner, Ido Leden, Stockholm: Liber , 2010, 2, 387-400 p.Chapter in book (Other academic)
  • 26.
    Andersson, Ingemar
    Kristianstad University, School of Health and Society.
    Rehabilitering vid långvarig smärta2010In: Smärta och smärtbehandling / [ed] Mads Werner, Ido Leden, Stockholm: Liber , 2010, 2, 401-409 p.Chapter in book (Other academic)
  • 27.
    Andersson, Pia
    et al.
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden.
    Augustsson, Lena
    Preoperativa metoder som anestesisjuksköterskan kan använda sig utav för att minska den postoperativa smärtan2011Independent thesis Advanced level (professional degree), 5 credits / 7,5 HE creditsStudent thesis
  • 28.
    Andersson-Wenckert, Ingrid
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Häggmark, Sören
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Johansson, Göran
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Lindkvist, Robert
    Reiz, Sebastian
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Anevac-D, a new system for close scavenging of anesthetic gases in dental practice1989In: Scandinavian Journal of Dental Research, ISSN 0029-845X, Vol. 97, no 5, 456-64 p.Article in journal (Refereed)
    Abstract [en]

    Anevac-D, a new system for close scavenging of anesthetic gases in dental practice is described. It consists of a rubber nose mask surrounded by an outer rigid shell and a chin scavenger. A vacuum in the slot between the nose masks provides scavenging of gases escaping from the inner mask. Gases escaping from the mouth are evacuated mainly by the skin scavenger. The efficiency of this system was assessed in healthy volunteers using argon as a tracer gas. Mass spectrometry was used for measurement of inspired, expired, and scavenged gas concentrations. The scavenging efficiency of the complete system was around 80% and was not affected by poor patient cooperation. It decreased to about 65% when the chin scavenger was removed. The dentist's exposure was measured by sampling of argon in the breathing zone by a Saran system. The average 4-min exposure varied between 90 and 250 ppm depending on system configuration and patient cooperation. Patient acceptance and clinical applicability were judged good. It is concluded that the Anevac-D system provides excellent scavenging properties and exposure levels well within the official recommendations by the Swedish Board of Occupational Safety and Health.

  • 29.
    Andreasson, Maria
    et al.
    Halmstad University, School of Social and Health Sciences (HOS).
    Ekstav Lilja, Lena
    Halmstad University, School of Social and Health Sciences (HOS).
    Förebyggande av anestesirelaterad atelektasbildning.2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Atelektaser uppstår inom tio minuter hos 90 % av alla patienter som sövs och leder till försämrad syresättning men kan även leda till postoperativa lungkomplikationer. Syftet med studien var att beskriva hur anestesisjuksköterskan med olika ventilationsstrategier kan förebygga atelektasbildning under generell anestesi. Studien genomfördes som en litteraturstudie där 19 vetenskapliga artiklar granskades och analyserades. Resultatet visar att när 100 % syrgas ges under induktionen av anestesi ökar uppkomsten av atelektaser. Om positive end-expiratory pressure (PEEP) 6-10 cmH2O används tillsammans med 100 % syrgas motverkas detta. Det är mer oklart vilken effekt PEEP har efter induktionen av anestesi. PEEP bör kombineras med rekryteringsmanöver för att effektivt motverka atelektasbildning. Olika metoder för att genomföra rekryteringsmanöver finns beskrivna men gemensamt är att topptrycket ska nå upp till cirka 40 cmH2O. Efter induktionen kan anestesisjuksköterskan även förebygga uppkomst av atelektaser genom använda 40 % syrgas. I den kliniska verksamheten saknas ofta riktlinjer för vilken ventilationsstrategi som ska användas. För att kunna arbeta preventivt med att förebygga atelektasbildning måste anestesisjuksköterskan diskutera ventilationsstrategi med anestesiläkaren innan problem med syresättningen uppstår. För framtida forskning skulle det kunna vara av intresse att undersöka hur olika ventilationsinställningar påverkar patientens upplevelse under preoxygenering.

  • 30. Aneman, A.
    et al.
    Svensson, M.
    Broome, M.
    Karolinska Institutet.
    Biber, B.
    Petterson, A.
    Fandriks, L.
    Specific angiotensin II receptor blockage improves intestinal perfusion during graded hypovolemia in pigs2000Other (Refereed)
    Abstract [en]

    OBJECTIVE: To investigate the potential of specific angiotensin II subtype 1 (AT1) receptor blockade to modify the mesenteric hemodynamic response to acute hypovolemia and retransfusion. DESIGN: Prospective, randomized, controlled experimental study. SETTING: University-affiliated animal research laboratory. SUBJECTS: Fasted, anesthetized, ventilated, juvenile domestic pigs of both sexes. INTERVENTIONS: Acute, graded hypovolemia by 20% and 40% of the total estimated blood volume followed by retransfusion in control animals (CTRL; n = 10) and animals pretreated with the AT1 receptor blocker candesartan (CAND; n = 10). MEASUREMENTS AND MAIN RESULTS: Invasive monitoring of arterial and central venous blood pressures, cardiac output, portal venous blood flow, and jejunal mucosal blood flow. Blood gases were repeatedly analyzed to calculate oxygen delivery and consumption. Thirty minutes after each level of hypovolemia at 20% and 40%, cardiac output was decreased in CTRL animals from a baseline of 2.9 +/- 0.1 to 1.8 +/- 0.2 and 1.1 +/- 0.2 L/min, with no differences compared with CAND animals. Cardiac output was restored to 3.0 +/- 0.3 L/min 30 mins after retransfusion in CTRL animals, with no significant intergroup differences. Baseline portal venous blood flow (Q(MES)) and jejunal mucosal perfusion (PU(JEJ)) were greater in CAND animals compared with CTRL animals. During graded hypovolemia, CAND animals maintained Q(MES) and PU(JEJ) at significantly higher levels compared with CTRL animals, particularly after 40% hemorrhage (+221% and + 244%, respectively, relative to the mean values in CTRL animals). The same pattern was observed after retransfusion. Moreover, the calculated mesenteric critical oxygen delivery was significantly greater in CTRL animals (74 mL/min) compared with CAND animals (34 mL/min). No animals died in the CAND group, whereas four animals died during 40% hypovolemia or retransfusion in the CTRL group. CONCLUSIONS: Specific AT1 blockade before acute hypovolemia significantly ameliorated mesenteric and, in particular, jejunal mucosal hypoperfusion. In addition, cardiovascular stability was improved, and mortality in conjunction with acute hypovolemia and retransfusion could be completely avoided. These findings support a fundamental role of the renin-angiotensin system in the mesenteric response to acute hypovolemia and indicate a substantial interventional potential for candesartan in conjunction with circulatory stress.

  • 31.
    Ansari, Malik
    et al.
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden.
    Azar, Jonny
    Barn och föräldrars behov av information och förberedelser inför ett kirurgiskt ingrepp2011Independent thesis Advanced level (professional degree), 5 credits / 7,5 HE creditsStudent thesis
  • 32.
    Antepohl, Wolfram
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Rehabilitation Medicine. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Reconstruction Centre, Department of Rehabilitation Medicine UHL.
    Dahle, Charlotte
    Linköping University, Department of Clinical and Experimental Medicine, Clinical Immunology. Linköping University, Faculty of Health Sciences.
    Sjöberg, Folke
    Linköping University, Department of Clinical and Experimental Medicine, Burn Center. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Anaesthetics, Operations and Specialty Surgery Center, Department of Hand and Plastic Surgery. Östergötlands Läns Landsting, Anaesthetics, Operations and Specialty Surgery Center, Department of Anaesthesiology and Surgery.
    Thorfinn, Johan
    Linköping University, Department of Clinical and Experimental Medicine, Surgery. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Reconstruction Centre, Department of Plastic Surgery, Hand surgery UHL.
    Interleukin-8 is elevated in cerebrospinal fluid following high-voltage electrical injury with late-onset paraplegia suggesting neuronal damage at the microlevel as causative factor2010In: Burns, ISSN 0305-4179, E-ISSN 1879-1409, Vol. 36, no 3, e7-e9 p.Article in journal (Refereed)
    Abstract [en]

    The patient, a 31-year-old male, sustained an electric burn injury (16 kV, AC/DC) while working with electric power lines. He was acutely admitted to a national burn center in Southeast Sweden, where burns equalling 29% of the total body surface area were noted. The burns were located at the front of the abdomen, upper arms bilaterally, and the left hip region, and the lesions were estimated to be mainly of the dermal type, what was believed initially to be caused mainly by an electric flash. There were no obvious entry or exit sites of the electric current. However, myoglobin in plasma was elevated as a sign of muscular degradation, suggesting that at least some current had passed through the tissues. According to the paramedic report there was an episode of a few minutes of unconsciousness immediately after the injury, but the patient was fully awake and alert on admission. There was no concomitant trauma.

  • 33. Arbeus, Mikael
    et al.
    Axelsson, Birger
    Friberg, Orjan
    Magnuson, Anders
    Bodin, Lennart
    Hultman, Jan
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Anaesthesiology and Intensive Care.
    Milrinone Increases Flow in Coronary Artery Bypass Grafts After Cardiopulmonary Bypass: A Prospective, Randomized, Double-Blind, Placebo-Controlled Study2009In: Journal of Cardiothoracic and Vascular Anesthesia, ISSN 1053-0770, E-ISSN 1532-8422, Vol. 23, no 1, 48-53 p.Article in journal (Refereed)
    Abstract [en]

    Objective: To compare the effects of a bolus of milrinone, 50 mu g/kg, versus placebo on flow in coronary artery bypass grafts after cardiopulmonary bypass (CPB). Design: A prospective, randomized, double-blind study. Setting: A university hospital. Participants: Forty-four patients with stable angina and left ventricular ejection fraction > 30% scheduled for elective coronary artery bypass graft (CABG) surgery were included. Intervention: Patients were randomized to receive 50 mu g/kg of milrinone (n = 22) or placebo (n = 22) after aortic declamping. Measurements and Main Results: The flow in coronary artery bypass grafts was measured with a transit time flow meter at 10 minutes and 30 minutes after termination of CPB. The hemodynamic evaluation included transesophageal echocardiography, mean arterial pressure (MAP), heart rate, and intracavitary measurement of left ventricular end-diastolic pressure (LVEDP). The flow in the saphenous vein grafts was significantly higher in the milrinone group when compared with the placebo group both at 10 and 30 minutes after termination of CPB (p < 0.001). At 10 minutes, the flow was 64.5 +/- 37.4 mL/min (mean +/- standard deviation) and 43.6 +/- 25.7 mL/min in nonsequential vein grafts for milrinone and placebo, respectively. Corresponding values at 30 minutes were 54.8 +/- 29.9 mL/min and 35.3 +/- 22.4 mL/min. The left internal thoracic artery (LITA) flow was higher in the milrinone group but did not reach statistical significance. The fractional area change was higher, and the MAP and calculated pressure gradient (MAP-LVEDP) were lower at 10 minutes in the milrinone group. Conclusion: Milrinone significantly increases the flow in anastomosed saphenous vein grafts after CPB, and has beneficial effects on left ventricular function.

  • 34.
    Arbeus, Mikael
    et al.
    Dept of Cardiothoracic Surgery and Anesthesiology, Örebro University hospital.
    Axelsson, Birger
    Dept of Cardiothoracic Surgery and Anesthesiology, Örebro University hospital.
    Friberg, Örjan
    Dept of Cardiothoracic Surgery and Anesthesiology, Örebro University hospital.
    Magnuson, Anders
    Statistical and Epidemiological Unit, Örebro University hospital.
    Bodin, Lennart
    Statistical and Epidemiological Unit, Örebro University hospital.
    Hultman, Jan
    Dept of Thoracic and Cardiovascular Anesthesio, Uppsala University hospital.
    Milrinone increases flow in coronary artery bypass grafts after cardiopulmonary bypass: a prospective, randomized, double-blind, placebo-controlled study2009In: Journal of Cardiothoracic and Vascular Anesthesia, ISSN 1053-0770, E-ISSN 1532-8422, Vol. 23, no 1, 48-53 p.Article in journal (Refereed)
    Abstract [en]

    OBJECTIVE: To compare the effects of a bolus of milrinone, 50 microg/kg, versus placebo on flow in coronary artery bypass grafts after cardiopulmonary bypass (CPB).

    DESIGN: A prospective, randomized, double-blind study.

    SETTING: A university hospital.

    PARTICIPANTS: Forty-four patients with stable angina and left ventricular ejection fraction >30% scheduled for elective coronary artery bypass graft (CABG) surgery were included.

    INTERVENTION: Patients were randomized to receive 50 microg/kg of milrinone (n = 22) or placebo (n = 22) after aortic declamping.

    MEASUREMENTS AND MAIN RESULTS: The flow in coronary artery bypass grafts was measured with a transit time flow meter at 10 minutes and 30 minutes after termination of CPB. The hemodynamic evaluation included transesophageal echocardiography, mean arterial pressure (MAP), heart rate, and intracavitary measurement of left ventricular end-diastolic pressure (LVEDP). The flow in the saphenous vein grafts was significantly higher in the milrinone group when compared with the placebo group both at 10 and 30 minutes after termination of CPB (p < 0.001). At 10 minutes, the flow was 64.5 +/- 37.4 mL/min (mean +/- standard deviation) and 43.6 +/- 25.7 mL/min in nonsequential vein grafts for milrinone and placebo, respectively. Corresponding values at 30 minutes were 54.8 +/- 29.9 mL/min and 35.3 +/- 22.4 mL/min. The left internal thoracic artery (LITA) flow was higher in the milrinone group but did not reach statistical significance. The fractional area change was higher, and the MAP and calculated pressure gradient (MAP-LVEDP) were lower at 10 minutes in the milrinone group.

    CONCLUSION: Milrinone significantly increases the flow in anastomosed saphenous vein grafts after CPB, and has beneficial effects on left ventricular function.

  • 35.
    A'roch, Roman
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Left ventricular function's relation to load, experimental studies in a porcine model2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Background: Loading conditions are recognized to influence ventricular function according to the Starling relationship for length/stretch and force.  Many modern echocardiographic parameters which have been announced as describing ventricular function and contractile status, may be confounded by uncontrolled and unmeasured load.  These studies aimed to measure the relation between four differ­ent types of assessments of ventricular dysfunction and degrees of load.  Study examined the ‘myo­cardial performance index’ (MPI).  Study II examined long axis segmental mechanical dyssynchrony.  Study III examined tissue velocities, and Study IV examined ventricular twist.  All studies aimed to describe the relation of these parameters both to load and to inotropic changes.

    Methods:  In anesthetized juvenile pigs, left ventricular (LV) pressure and volume were measured continuously and their relationship (LVPVR) was analysed.  Preload alterations were brought about by inflation of a balloon tipped catheter in the inferior vena cava (IVCBO).  Inotropic interventions were brought about by either an overdose of anesthetic (combine intravenous pentobarbital and inhaled isoflurane, Study I), or beta blocker and calcium channel blocker given in combination (Stud­ies III and IV).  In one study (II), global myocardial injury and dysfunction was induced by endotoxin infusion.  MPI measurements were derived from LVPVR heart cycle intervals for isovolumic contrac­tion and relaxation as well as ejection time.  Long axis segmental dyssynchrony was derived by ana­lyzing for internal flow and time with segmental dyssynchronous segment volume change during systole, hourly before and during 3 hours of endotoxin infusion.  Myocardial tissue velocities were measured during IVCBO at control, during positive and then later negative inotropic interventions.  The same for apical and base circumferential rotational velocities by speckle tracking.  Load markers (including end-diastolic volume) were identified for each beat, and the test parameters were analysed together with load for a relation.  The test parameters were also tested during single apneic beats for a relation to inotropic interventions.

    Results: MPI demonstrated a strong and linear relationship to both preload and after-load, and this was due to changes in ejection time, and not the isovolumic intervals.  Long axis segmental dyssyn­chrony increased during each hour of endotoxin infusion and global myocardial injury.  This dysyn­chrony parameter was independent of load when tested by IVCBO. Peak systolic velocities were strongly load-independent, though not in all the inotropic situations and by all measurement axes.  Peak systolic strain was load-dependent, and not strongly related to inotropic conditions.  Peak sys­tolic LV twist and untwist were strongly load-dependent.

    Conclusions: MPI is strongly load-dependent, and can vary widely in value for the same contractile status if the load is varied.  Mechanical dyssynchrony measures are load-independen in health and also in early global endotoxin myocardial injury and dysfunction.  Peak sytole velocities are a clinically robust parameter of LV regional and global performance under changing load, though peak systolic strain seems to be load-dependent.  Left ventricular twist and untwist are load-dependent in this pig model.

  • 36.
    Aronsson, Johnas
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden.
    DESATURATION I SAMBAND MED GENERELL ANESTESI: En litteraturgenomgång2009Independent thesis Advanced level (professional degree), 5 credits / 7,5 HE creditsStudent thesis
  • 37.
    Arvidsson, Anna
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Surgery.
    ICU-care for patients ≥ 80 years of age2016Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 38.
    Athlin, Åsa Muntlin
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Health Services Research. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Cardiovascular epidemiology. Univ Uppsala Hosp, Dept Emergency Care & Internal Med, Entrance 40, S-75185 Uppsala, Sweden.;Univ Adelaide, Sch Nursing, Adelaide, SA, Australia..
    Engström, Maria
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Caring Sciences. Univ Gavle, Fac Hlth & Occupat Studies, Dept Hlth & Caring Sci, Gavle, Sweden.;Lishui Univ, Sch Med & Hlth, Dept Nursing, Lishui, Peoples R China..
    Gunningberg, Lena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Public Health and Caring Sciences, Caring Sciences. Univ Uppsala Hosp, Qual Dept, Uppsala, Sweden..
    Baath, Carina
    Karlstad Univ, Fac Hlth Sci & Technol, Dept Hlth Sci, Karlstad, Sweden.;Cty Council Varmland, Karlstad, Sweden..
    Heel pressure ulcer, prevention and predictors during the care delivery chain - when and where to take action?: A descriptive and explorative study2016In: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine, ISSN 1757-7241, E-ISSN 1757-7241, Vol. 24, 134Article in journal (Refereed)
    Abstract [en]

    Background: Hazardous healthcare settings, for example acute care, need to focus more on preventing adverse events and preventive actions across the care delivery chain (i.e pre-hospital and emergency care, and further at the hospital ward) should be more studied. Pressure ulcer prevalence is still at unreasonably high levels, causing increased healthcare costs and suffering for patients. Recent biomedical research reveals that the first signs of cell damage could arise within minutes. However, few studies have investigated optimal pressure ulcer prevention in the initial stage of the care process, e.g. in the ambulance care or at the emergency department. The aim of the study was to describe heel pressure ulcer prevalence and nursing actions in relation to pressure ulcer prevention during the care delivery chain, for older patients with neurological symptoms or reduced general condition. Another aim was to investigate early predictors for the development of heel pressure ulcer during the care delivery chain. Methods: Existing data collected from a multi-centre randomized controlled trial investigating the effect of using a heel prevention boot to reduce the incidence of heel pressure ulcer across the care delivery chain was used. Totally 183 patients participated. The settings for the study were five ambulance stations, two emergency departments and 16 wards at two hospitals in Sweden. Results: A total of 39 individual patients (21 %) developed heel pressure ulcer at different stages across the care delivery chain. Findings revealed that 47-64 % of the patients were assessed as being at risk for developing heel pressure ulcer. Preventive action was taken. However, all patients who developed pressure ulcer during the care delivery chain did not receive adequate pressure ulcer prevention actions during their hospital stay. Discussion and Conclusions: In the ambulance and at the emergency department, skin inspection seems to be appropriate for preventing pressure ulcer. However, carrying out risk assessment with a validated instrument is of significant importance at the ward level. This would also be an appropriate level of resource use. Context-specific actions for pressure ulcer prevention should be incorporated into the care of the patient from the very beginning of the care delivery chain.

  • 39.
    Augustsson, Rebecka
    et al.
    Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences.
    Olsson, Sofie
    Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences.
    Intensivvårdssjuksköterskors erfarenheter av att bedöma sederade patienter i ventilator: En kvalitativ intervjustudie2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Titel: Intensivvårdssjuksköterskors erfarenheter av att bedöma sederade patienter i ventilator: En kvalitativ intervjustudie. Bakgrund: Den kritiskt sjuke intensivvårdspatienten behöver såväl resurskrävande som komplicerad behandling. Sedering administreras till patienter i ventilatorbehandling för att lindra ångest och smärta. Intensivvården bygger på multiprofessionellt samarbete och strävar efter individuellt anpassad sedering för att upprätthålla komfortabel sederingsnivå. Riktlinjer och bedömningsskalor är viktiga hjälpmedel vid bedömning och titrering av sedering. Det är utmaningar i att vårda sederade patienter och det ställer stora krav på intensivvårdssjuksköterskan. Syfte: Syftet var att belysa intensivvårdssjuksköterskors erfarenheter av att bedöma sederade patienter i ventilator på intensivvårdsavdelning. Metod: Studien genomfördes med en kvalitativ design genom individuella semistrukturerade intervjuer med tio intensivvårdssjuksköterskor. Nio av deltagarna var kvinnor och en var man. Data analyserades genom kvalitativ innehållsanalys. Resultat: Studiens resultat frambringade i följande tema Bedömning – En väg av utmaningar som belyste intensivvårdssjuksköterskors erfarenheter av att bedöma sederade patienter i ventilator. Resultatet presenteras under två kategorier: Osäkerhet vid sederingsnivå och Brister vid sedering. Osäkerhet vid sederingsnivå blev påtaglig på grund av otydliga riktlinjer, svårigheter i att upprätthålla en individuell sederingsnivå och utifrån den komplicerade kommunikationen med patienten. Brister vid sedering blev påtaglig på grund av känsla av otillräcklighet och brist på både samarbete och kunskap försvårade ytterligare intensivvårdssjuksköterskans bedömning och titrering av sedering. Slutsats: Studien identifierar utmaningar som bidrar till osäkerhet och brister vid sedering. Dessa utmaningar bör förhindras genom utbildning för att bibehålla patientsäkerheten och möjliggöra god vård. Intensivvårdssjuksköterskan bör få insikt i de samhällsekonomiska vinster som god följsamhet till riktlinjer och bedömningsskalor frambringar.

  • 40.
    Axelsson, Birger
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Cardiac effects of non-adrenergic inotropic drugs: clinical and experimental studies2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Background: Myocardial failure and dysfunction is not uncommon during critical illness and following cardiac surgery. For optimal treatment, a better understanding of the effects of inotropic drugs is needed. In this thesis, two non-adrenergic mediated inotropes, milrinone and levosimendan were studied in different models of myocardial dysfunction. The study aims were to assess the following: the effects of milrinone on blood flow in coronary artery bypass grafts during CABG surgery; the effects of milrinone on left ventricular diastolic function during post-ischaemic myocardial dysfunction; whether milrinone or levosimendan are protective or injurious during acute myocardial ischaemia, and if levosimendan potentiates myocardial function when added to milrinone in an experimental model of post-ischaemic (stunned) myocardium.

    Material and Methods: In Study I, 44 patients undergoing coronary artery bypass surgery(CABG) were included as subjects. Milrinone or saline was administrated in a single dose during cardio-pulmonary bypass (CPB) and coronary graft flow measurements were recorded after 10 and 30 min following CPB. In Study II; 24 patients undergoing CABG had estimations of peak ventricular filling rates made before and after CPB with administration of milrinone or saline as a single dose during CPB, performed by assessment of the rate of change in diastolic cross-sectional left ventricular area. In Study III, energy-metabolic effects of milrinone and levosimendan were measured in an anaesthetized porcine model during 45 minutes of regional myocardial ischemia. Microdialysis sampling of metabolites of local ischemic metabolism allowed assessment of glycolytic activity and the degree of myocardial calcium overload. In Study IV, in a porcine model of postischaemic myocardial stunning, ventricular pressure-volume relationships were analyzed when milrinone or a combination of milrinone and levosimendan were given together.

    Results: In Study I, there was a clear increase in non-sequential saphenous vein graft blood flow with milrinone at 10 minutes (64.5 ± 37.4 compared to placebo 43.6 ± 25.7 ml/min (mean ± SD).). A decreasing but still measureable flow increase was seen for milrinone at 30 minutes. In Study II, an increase in early left ventricular filling rate (ventricular cross-sectional area rate of change,dA/dt) was seen in the milrinone treated group. Pre-bypass milrinone group dA/dt 22.0 ± 9.5 changed to post-bypass values dA/dt 27.8 ± 11.5 cm2/sec). Placebo group pre-bypass dA/dt was 21.0 ± 8.7 and post-bypass 17.1 ± 7.1 cm2/sec. A milrinone effect was demonstrated in an adjusted regression model (p = 0.001). In Study III, neither milrinone nor levosimendan led to a change in energy-metabolic activity during ischemia as reflected by interstitial glucose, pyruvate, lactate orglycerol. Neither drug exacerbated the relative myocardial calcium overload during ischemia. In Study IV, milrinone improved active relaxation (tau) in post-ischemic stunned myocardium, but did not markedly improve systolic function by preload recruitable stroke work. Levosimendan added to milrinone showed minimal effect on active relaxation but a positive effect on systolic function in combination with milrinone.

    Conclusions: We conclude that milrinone treatment leads to an increase in blood flow in newly implanted coronary saphenous vein grafts, and improves ventricular relaxation post-cardiopulmonary bypass. Neither milrinone nor levosimendan, in this porcine model, negatively influence myocardial energy metabolism or calcium overload during acute ischaemia. Addition of levosimendan to milrinone treatment during post-ischaemic ventricular dysfunction may provide additive inotropic effects on systolic function but probably not for active relaxation.

  • 41.
    Axelsson, Birger
    et al.
    Dept of Cardiothoracic Surgery and Anestesiology, Örebro University hospital.
    Arbeus, Mikael
    Dept of Cardiothoracic Surgery and Anestesiology, Örebro University hospital.
    Magnuson, Anders
    Statistical and Epidemiological Unit, Örebro University hospital.
    Hultman, Jan
    Thoracic clinic, Karolinska University hospital.
    Milrinone improves diastolic function in coronary artery bypass surgery as assessed by acoustic quantification and peak filling rate: a prospective randomized study2010In: Journal of Cardiothoracic and Vascular Anesthesia, ISSN 1053-0770, E-ISSN 1532-8422, Vol. 24, no 2, 244-249 p.Article in journal (Refereed)
    Abstract [en]

    OBJECTIVE: To compare the effects of a bolus dose of milrinone, 50 microg/kg, to placebo on diastolic function (active relaxation) in patients undergoing on-pump coronary artery bypass grafting (CABG).

    DESIGN: Prospective, randomized, double-blind, placebo-controlled study.

    SETTING: University hospital.

    PARTICIPANTS: Twenty-four patients with stable angina and left ventricular ejection fraction >30%, scheduled for elective CABG using cardiopulmonary bypass (CPB), were included.

    INTERVENTION: Patients were randomized to receive either 50 microg/kg of milrinone (n = 12) or placebo (n = 12) after aortic declamping.

    MEASUREMENTS AND MAIN RESULTS: The diastolic function of the left ventricle (LV) was measured as peak filling rate (dA/dt [maximal diastolic area change over time]) with transesophageal echocardiography (TEE) using acoustic quantification (AQ) before CPB and 10 minutes after termination of CPB. The normalized peak filling rate (dA/dt)/EDA was also calculated. Active relaxation was statistically significantly increased in the milrinone group compared with the placebo group after CPB.

    CONCLUSION: Patients undergoing CABG surgery and treated with milrinone after aortic declamping had better diastolic function following cardiopulmonary bypass.

  • 42.
    Axelsson, Birger
    et al.
    Örebro University, Örebro, Sweden .
    Häggmark, Sören
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Svenmarker, Staffan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Johansson, Göran
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Gupta, Anil
    Örebro University, Örebro, Sweden .
    Tyden, Hans
    Örebro University, Örebro, Sweden .
    Wouters, Patrick
    Ghent, Belgium.
    Haney, Michael
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Effects of Combined Milrinone and Levosimendan Treatment on Systolic and Diastolic Function During Postischemic Myocardial Dysfunction in a Porcine Model2016In: Journal of Cardiovascular Pharmacology and Therapeutics, ISSN 1074-2484, E-ISSN 1940-4034, Vol. 21, no 5, 495-503 p.Article in journal (Refereed)
    Abstract [en]

    It is not known whether there are positive or negative interactions on ventricular function when a calcium-sensitizing inotrope is added to a phosphodiesterase inhibitor in the clinical setting of acute left ventricular (LV) dysfunction. We hypothesized that when levosimendan is added to milrinone treatment, there will be synergetic inotropic and lusitropic effects. This was tested in an anesthetized porcine postischemic global LV injury model, where ventricular pressures and volumes (conductance volumetry) were measured. A global ischemic injury was induced by repetitive left main stem coronary artery occlusions. Load-independent indices of LV function were assessed before and after ventricular injury, after milrinone treatment, and finally after addition of levosimendan to the milrinone treatment. Nonparametric, within-group comparisons were made. The protocol was completed in 12 pigs, 7 of which received the inotrope treatment and 5 of which served as controls. Milrinone led to positive lusitropic effects seen by improvement in tau after myocardial stunning. The addition of levosimendan to milrinone further increased lusitropic state. The latter effect could however not be attributed solely to levosimendan, since lusitropic state also improved spontaneously in time-matched controls at the same rate during the corresponding period. When levosimendan was added to milrinone infusion, there was no increase in systolic function (preload recruitable stroke work) compared to milrinone treatment alone. We conclude that in this model of postischemic LV dysfunction, there appears to be no clear improvement in systolic or diastolic function after addition of levosimendan to established milrinone treatment but also no negative effects of levosimendan in this context.

  • 43.
    Axelsson, Birger
    et al.
    Dept of Cardiovascular and Thoracic Surgery and Anesthesiology and Intensive Care, Örebro University Hospital.
    Häggmark, Sören
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Svenmarker, Staffan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Johansson, Göran
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Gupta, Anil
    Dept of Clinical Medicine, School of Health and Medical Sciences, Örebro University.
    Tydén, Hans
    Dept of Clinical Medicine, School of Health and Medical Sciences, Örebro University.
    Wouters, Patrick
    Dept of Anesthesiology, University Hospital Ghent, Ghent, Belgium.
    Haney, Michael
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Systolic and diastolic effects of milrinone and levosimendan in porcine post-ischemic myocardial dysfunctionManuscript (preprint) (Other academic)
  • 44.
    Axelsson, Birger
    et al.
    Dept of Cardiovascular and Thoracic Surgery, Örebro University hospital.
    Johansson, Göran
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Abrahamsson, Pernilla
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Gupta, Anil
    Dept of Anesthesiology and Intensive Care, Örebro University hospital.
    Tydén, Hans
    Dept of Cardiovascular and Thoracic Surgery, Örebro University hospital.
    Wouters, Patrick
    Dept of Anesthesiology, University hospital Ghent, Belgium.
    Haney, Michael
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Anaesthesiology.
    Milrinone and levosimendan during porcine myocardial ischemia: no effects on calcium overload and metabolism2013In: Acta Anaesthesiologica Scandinavica, ISSN 0001-5172, E-ISSN 1399-6576, Vol. 57, no 6, 719-728 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Although inotropic stimulation is considered harmful in the presence of myocardial ischaemia, both calcium sensitisers and phosphodiesterase inhibitors may offer cardioprotection. We hypothesise that these cardioprotective effects are related to an acute alteration of myocardial metabolism. We studied in vivo effects of milrinone and levosimendan on calcium overload and ischaemic markers using left ventricular microdialysis in pigs with acute myocardial ischaemia.

    METHODS: Anaesthetised juvenile pigs, average weight 36 kg, were randomised to one of three intravenous treatment groups: milrinone 50 μg/kg bolus plus infusion 0.5 μg/kg/min (n = 7), levosimendan 24 μg/kg plus infusion 0.2 μg/kg/min (n = 7), or placebo (n = 6) for 60 min prior to and during a 45 min acute regional coronary occlusion. Systemic and myocardial haemodynamics were assessed, and microdialysis was performed with catheters positioned in the left ventricular wall. (45) Ca(2+) was included in the microperfusate in order to assess local calcium uptake into myocardial cells. The microdialysate was analysed for glucose, lactate, pyruvate, glycerol, and for (45) Ca(2+) recovery.

    RESULTS: During ischaemia, there were no differences in microdialysate-measured parameters between control animals and milrinone- or levosimendan-treated groups. In the pre-ischaemic period, arterial blood pressure decreased in all groups while myocardial oxygen consumption remained stable.

    CONCLUSIONS: These findings reject the hypothesis of an immediate energy-conserving effect of milrinone and levosimendan during acute myocardial ischaemia. On the other hand, the data show that inotropic support with milrinone and levosimendan does not worsen the metabolic parameters that were measured in the ischaemic myocardium.

  • 45.
    Axelsson, Kjell
    et al.
    Örebro University, School of Health and Medical Sciences.
    Gupta, Anil
    Örebro University, School of Health and Medical Sciences.
    Johanzon, Eva
    Berg, Elisabeth
    Ekbäck, Gustav
    Rawal, Narinder
    Enström, Peter
    Nordensson, Ulf
    Intraarticular administration of ketorolac, morphine, and ropivacaine combined with intraarticular patient-controlled regional analgesia for pain relief after shoulder surgery: a randomized, double-blind study2008In: Anesthesia and Analgesia, ISSN 0003-2999, E-ISSN 1526-7598, Vol. 106, no 1, 328-333 p.Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: In this study we assessed the efficacy of intraarticular regional analgesia on postoperative pain and analgesic requirements. METHODS: Fifty-one patients undergoing shoulder surgery (Bankart) were recruited into this double-blind study. At the end of the operation, patients were randomized to three groups to receive intraarticularly via a catheter: Group 1: ropivacaine 90 mg (9 mL), morphine 4 mg (10 mL), and ketorolac 30 mg (1 mL) (total volume 20 mL); Groups 2 and 3: saline (20 mL). In addition, Groups 1 and 3 received 1 mL saline IV while Group 2 received ketorolac 30 mg (1 mL) IV. Postoperatively, Group 1 received pain relief using 10 mL 0.5% ropivacaine on demand via the intraarticular catheter while Groups 2 and 3 received 10 mL of saline intraarticularly. Group 3 was the Control group. RESULTS: Postoperative pain at rest and on movement were lower in Group 1 than in Groups 2 and 3 during the first 30 and 120 min, respectively. The time to first request for local anesthetic infusion was longer in Group 1 than in Groups 2 and 3 (P < 0.001). The median morphine consumption during the first 24 postoperative hours was less in Groups 1 and 2 than in Group 3 (P < 0.001). There was no significant difference in analgesic consumption between Group 1 and Group 2. The median satisfaction score was higher in Group 1 compared with Groups 2 (P < 0.05) and 3 (P < 0.001). CONCLUSIONS: A combination of intraarticular ropivacaine, morphine, and ketorolac followed by intermittent injections of ropivacaine as needed provided better pain relief, less morphine consumption, and improved patient satisfaction compared with the control group. The group that received IV ketorolac consumed less morphine and was more satisfied with treatment than patients in the control group.

  • 46. Axelsson, Patric
    et al.
    Thörn, Sven-Egron
    Örebro University, Department of Clinical Medicine.
    Lövqvist, Åsa
    Wattwil, Lisbeth
    Örebro University, Department of Clinical Medicine.
    Wattwil, Magnus
    Örebro University, Department of Clinical Medicine.
    Betamethasone does not prevent nausea and vomiting induced by the dopamine-agonist apomorphine2006In: Canadian Journal of Anesthesia, ISSN 0832-610X, E-ISSN 1496-8975, Vol. 53, no 4, 370-374 p.Article in journal (Refereed)
    Abstract [en]

    PURPOSE: The mechanism of the antiemetic actions of corticosteroids is not known. The purpose of this study was to evaluate if betamethasone can prevent nausea, vomiting or increase of vasopressin induced by apomorphine. Metoclopramide, a dopamine antagonist, was used as a control substance. METHODS: Ten healthy volunteers were studied on three occasions. In a randomized order they were allocated to receive pretreatment with betamethasone 8 mg iv, metoclopramide 10 mg iv, and normal saline 2 mL as placebo on the three different occasions, 15 min before the administration of apomorphine 30 microg x kg(-1) s.c.. After administration of apomorphine, episodes of vomiting were recorded, and the intensity of nausea was estimated by the subject on a visual analogue scale (VAS 0-10 cm). Blood samples for analysis of plasma concentrations of vasopressin were analyzed. RESULTS: One volunteer decided to withdraw, as he experienced akathisia after receiving metoclopramide. During the first two hours after apomorphine, eight of nine volunteers vomited both after betamethasone and placebo. One volunteer did not vomit after betamethasone and placebo but he experienced nausea. None of the volunteers vomited after metoclopramide (P < 0.01 vs betamethasone and placebo). The maximum VAS for nausea was significantly higher after betamethasone and placebo compared to metoclopramide (P < 0.01). The vasopressin levels increased after betamethasone and placebo, but there was no increase in any volunteer after pretreatment with metoclopramide. CONCLUSION: This study demonstrates that betamethasone does not prevent nausea, vomiting and increase of vasopressin induced by apomorphine, whereas metoclopramide prevents apomorphine-induced emesis. Our work suggests that betamethasone does not have dopamine-antagonistic effects.

  • 47.
    Axman Sara, Inga Lisa
    et al.
    Örebro University, School of Health and Medical Sciences, Örebro University, Sweden.
    Kvist, Maria
    Patienters upplevelser av att fasta inför operation2012Independent thesis Advanced level (professional degree), 5 credits / 7,5 HE creditsStudent thesis
  • 48.
    Azman, Josip
    et al.
    Region Östergötland, Anaesthetics, Operations and Specialty Surgery Center, Department of Anaesthesiology and Intensive Care in Linköping. Rijeka University Hospital, Croatia; Rijeka University Hospital, Croatia.
    Stopar Pintaric, Tatjana
    University of Medical Centre Ljubljana, Slovenia; University of Ljubljana, Slovenia.
    Cvetko, Erika
    University of Ljubljana, Slovenia.
    Vlassakov, Kamen
    Harvard Medical Sch, MA USA.
    Ultrasound-Guided Glossopharyngeal Nerve Block A Cadaver and a Volunteer Sonoanatomy Study2017In: Regional anesthesia and pain medicine, ISSN 1098-7339, E-ISSN 1532-8651, Vol. 42, no 2, 252-258 p.Article in journal (Refereed)
    Abstract [en]

    Background and Objectives: Glossopharyngeal nerve (GPN) blocks are usually performed by topical, intraoral, or peristyloid approaches, which carry significant complication risks due to the proximity of important neurovascular structures. This study presents a proof of concept for a new ultrasound (US)-guided technique, which would block the GPN distally, in the parapharyngeal space, away from the immediate vicinity of high-risk collateral structures. Methods: Five cadaver heads were dissected, and the location of theGPN was explored bilaterally. In 40 healthy volunteers (20 men and 20 women; median age, 35.5 years [range, 24-69 years]) parapharyngeal sonograms were obtained, saved, and analyzed. To assess the technical feasibility of a distal GPN block in the parapharyngeal space, unilateral US-guided dye injections were performed in 3 fresh cadavers, followed by dissections. Results: The GPN was consistently identified between the stylopharyngeal and middle pharyngeal constrictor muscles in all cadaver specimens. The median distance between the GPN and the ipsilateral greater horn of the hyoid bone was 2.4 cm (range, 2.3-2.7 cm) on the right and 2.6 cm (range, 2.3-2.9 cm) on the left. The mean skin-to pharyngealwall distances in the volunteers were 2.03 (SD, 0.41) cm on the right and 2.02 (SD, 0.45) cm on the left. The mean hyoid bone-to-pharyngeal wall distances were 2.04 (SD, 0.35) cm (right) and 2.07 (SD, 0.35) cm (left). The fresh cadaver dissections demonstrated dye deposition adjacent to theGPNin the parapharyngeal space in all specimens. Conclusions: Based on our anatomical results in cadavers and healthy volunteers, we submit that successful and safe blockade of the distal GPN at the pharyngealwall level is technically feasible under US guidance.

  • 49. Backes, Yara
    et al.
    van der Sluijs, Koenraad F
    Mackie, David P
    Tacke, Frank
    Koch, Alexander
    Tenhunen, Jyrki
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Anaesthesiology and Intensive Care.
    Schultz, Marcus J
    Usefulness of suPAR as a biological marker in patients with systemic inflammation or infection: a systematic review2012In: Intensive Care Medicine, ISSN 0342-4642, E-ISSN 1432-1238, Vol. 38, no 9, 1418-1428 p.Article, review/survey (Refereed)
    Abstract [en]

    PURPOSE:

    Systemic levels of soluble urokinase-type plasminogen activator receptor (suPAR) positively correlate with the activation level of the immune system. We reviewed the usefulness of systemic levels of suPAR in the care of critically ill patients with sepsis, SIRS, and bacteremia, focusing on its diagnostic and prognostic value.

    METHODS:

    A PubMed search on suPAR was conducted, including manual cross-referencing. The list of papers was narrowed to original studies of critically ill patients. Ten papers on original studies of critically ill patients were identified that report on suPAR in sepsis, SIRS, or bacteremia.

    RESULTS:

    Systematic levels of suPAR have little diagnostic value in critically ill patients with sepsis, SIRS, or bacteremia. Systemic levels of suPAR, however, have superior prognostic power over other commonly used biological markers in these patients. Mortality prediction by other biological markers or severity-of-disease classification system scores improves when combining them with suPAR. Systemic levels of suPAR correlate positively with markers of organ dysfunction and severity-of-disease classification system scores. Finally, systemic levels of suPAR remain elevated for prolonged periods after admission and only tend to decline after several weeks. Notably, the type of assay used to measure suPAR as well as the age of the patients and underlying disease affect systemic levels of suPAR.

    CONCLUSIONS:

    The diagnostic value of suPAR is low in patients with sepsis. Systemic levels of suPAR have prognostic value, and may add to prognostication of patients with sepsis or SIRS complementing severity-of-disease classification systems and other biological markers.

  • 50.
    Bak, Zoltan
    Linköping University, Department of Medicine and Health Sciences, Anesthesiology . Linköping University, Faculty of Health Sciences.
    Cardiovascular response to hyperoxemia, hemodilution and burns: a clinical and experimental study2007Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The last decades less invasive monitoring and analytical tools have been developed for the evaluation of myocardial mechanics in clinical praxis. In critical care, these are longed-for complements to pulmonary artery catheter monitoring, additionally offering previously inaccessible information. This work is aimed, during fluid-replacement and oxygen therapy, to determine the physiological interface of ventricular and vascular mechanical properties, which result in the transfer of blood from the heart to appropriate circulatory beds. In prospective clinical studies we investigated previously cardiovascular healthy adults during hyperoxemia, and during preoperative acute normovolemic hemodilution or early fluid resuscitation of severe burn victims. Echocardiography was used in all studies, transthoracic for healthy volunteers and transesophageal for patients. For vascular parameters and for control purposes pulmonary artery Swan-Ganz catheter, calibrated external pulse recordings, whole body impedance cardiography, and transpulmonel thermodilution method were applied.

    We detected no significant change in blood pressure or heart rate, the two most often used parameters for patient monitoring. During preoperative acute normovolemic hemodilution a reduction of hemoglobin to 80 g/l did not compromise systolic or diastolic myocardial function. Cardiac volumes and flow increased with a concomitant fall in systemic vascular resistance while oxygen delivery seemed maintained. Supplemental oxygen therapy resulted in a linear dose-response between arterial oxygen and cardiovascular parameters, suggesting a direct vascular effect. Cardiac flow decreased and vascular resistance increased from hyperoxemia, and a decrease of venous return implied extracardial blood-pooling. Severe burns result in hypovolemic shock if not properly treated. The commonly used Parkland fluid replacement strategy, with urinary output and mean arterial pressure as endpoints, has recently been questioned. Applying this strategy, only transient early central hypovolemia was recorded, while dimensional preload, global left ventricular systolic function and oxygen delivery or consumption remained within normal ranges during the first 36 hours after accident. Signs of restrictive left ventricular diastolic function were detected in all patients and regional unstable systolic dysfunction was recognized in every other patient, and was consistent with myocardial marker leakage. Severe burns thereby cause myocardial stiffness and systolic regional dysfunction, which may not be prevented only by central normovolemia and adequate oxygenation.

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