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Ventilering av koldioxid ur kardiotomi-reservoar
KTH, School of Technology and Health (STH).
KTH, School of Technology and Health (STH).
2015 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Ventilation of carbon dioxide from cardiotomy-reservoir (English)
Abstract [sv]

Vid hjärtoperationer leder man bort blodet från hjärtat och kopplar upp patienten till en hjärt-lungmaskin med tillhörande behållare (kardiotomi-reservoar). I det öppna såret tillförs koldioxid kontinuerligt. Detta görs för att avlufta sårhålan och hindra luft från att komma in i hjärtat och de stora kärlen under kirurgi. Ett gasutbyte sker då mellan vävnaden i såret och den tillförda koldioxiden. Då blodet senare sugs upp av en sugslang hamnar det i kardiotomi-reservoaren och den totala koldioxidhalten i patientens blod riskerar att bli ännu högre.

Denna rapport behandlar en studie som gjorts för att försöka minska dessa koldioxidnivåer i blodet. Detta gjordes genom att fylla kardiotomi-reservoaren med valda värden vatten, samt samtidigt tillföra koldioxid och luft för att sedan mäta effektiviteten av ventileringen av koldioxid. Resultaten som erhölls var att oavsett vattennivå och koldioxidtillförsel så kan man med hjälp av luft ventilera bort koldioxid från reservoaren. Slutsatsen blir att ju högre lufttillförsel som används desto bättre blir ventilationen.

Abstract [en]

During heart surgeries it is necessary to direct the blood away from the heart and connect the patient to an extra corporeal circulation (ECC) with an associated reservoir (cardiotomy-reservoir). In the open wound a continuous flow of carbon dioxide is insufflated. This is to de-air the wound so that no air enters the heart and large vessels during surgery. An exchange of gases occurs between the tissue of the wound and the applied carbon dioxide. Throughout the surgery the wound will bleed and that blood will be evacuated in to the cardiotomy-reservoir. This can increase the total carbon dioxide level of the patient.

The subject that was studied in this report was how to decrease the carbon dioxide levels in the blood. The method used was to fill the cardiotomy-reservoir with chosen volumes of water and simultaneously insufflate carbon dioxide and air. This was to measure the effectiveness of the evacuation of carbon dioxide. The results were that, despite water levels and carbon dioxide supply, one was able to ventilate the reservoir. The conclusion is that the higher air supply that is used the better ventilation will be achieved.

Place, publisher, year, edition, pages
2015. , 41 p.
Series
TRITA-STH, 2015:45
Keyword [en]
Cardiotomy-reservoir, carbon dioxide, ventilation, heart-lung machine
Keyword [sv]
Kardiotomi-reservoar, koldioxid, ventilering, hjärt-lungmaskin
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-169913OAI: oai:DiVA.org:kth-169913DiVA: diva2:826160
Subject / course
Medical Engineering
Educational program
Master of Science in Engineering - Medical Engineering
Supervisors
Examiners
Available from: 2015-06-27 Created: 2015-06-24 Last updated: 2015-06-27Bibliographically approved

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