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Mätosäkerhet vid kalibrering av referensutrustning för blodtrycksmätning: En modell för framtagning av mätosäkerhet för referensmanometer WA 767
KTH, School of Technology and Health (STH).
KTH, School of Technology and Health (STH).
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Measurement uncertainty for calibration of reference equipment for blood pressure measurement : A model for obtaining measurement uncertainty of reference manometer WA 767 (English)
Abstract [sv]

Avdelningen för Medicinsk teknik på Akademiska sjukhuset har uppdaterat befintliga kalibreringsprotokoll för Welch Allyn 767 som används som referensmanometer vid kalibrering av blodtrycksmätare. I protokollet ska det enligt ISO 9001 och ISO 13485 ingå att vid varje kalibreringspunkt ange mätosäkerheten.  Rutiner kring detta var inte definierade. En modell för att ta fram mätosäkerhet utformades utifrån standardiserade metoder från “Guide to the expression of uncertainty in measurement” och anpassades för att kunna användas på den medicintekniska avdelningen. En mätmetod för kalibrering togs fram och med modellen beräknades mätosäkerhet för en referensmanometer. Mätosäkerheten med definierad mätmetod blev lägre än den av Welch Allyn specificerade mätosäkerheten på ± 3 mmHg. Felfortplantning från kalibrering till blodtrycksmätning undersöktes. Mätosäkerheten ökade i varje steg, varför avdelningen bör ta fram ett protokoll för hur kalibrering genomförs, och på så sätt förbättra spårbarheten.

Abstract [en]

The department of Medical Technology at Akademiska sjukhuset has updated their current protocol for calibration for Welch Allyn 767, which serves as a reference manometer for blood pressure meters when being calibrated. According to ISO 9001 and ISO 13485, the protocol has to include a measurement uncertainty for every given point of calibration. The routines regarding this were undefined. A model for retrieving measurement uncertainty was designed using standardized methods from “Guide to the expression of uncertainty in measurement” and was customized to be used at the department of Medical Technology. A method for calibration was created and used to calculate the measurement uncertainty for the reference manometer. This measurement uncertainty was smaller than the one specified by Welch Allyn, which was ± 3 mmHg. Propagation of uncertainty from the calibration to the blood pressure measurement was investigated. The measurement uncertainty increased in every step. Therefore, the department should introduce a protocol for how a calibration is performed, and thereby improve the traceability.

Place, publisher, year, edition, pages
2016. , 106 p.
Series
TRITA-STH, 2016:28
Keyword [en]
calibration, Welch Allyn 767, Measurement uncertainty, reference manometer, blood pressure measurement, Auscultatory blood pressure measurement, traceability, GUM
Keyword [sv]
kalibrering, Welch Allyn 767, mätosäkerhet, referensmanometer, blodtrycksmätning, auskultatorisk blodtrycksmätning, spårbarhet, GUM
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-191279OAI: oai:DiVA.org:kth-191279DiVA: diva2:955807
External cooperation
Akademiska sjukhuset
Subject / course
Medical Engineering
Educational program
Master of Science in Engineering - Medical Engineering
Presentation
2016-05-26, KTH, Huddinge, 12:56 (Swedish)
Supervisors
Examiners
Available from: 2016-08-26 Created: 2016-08-26 Last updated: 2016-08-26Bibliographically approved

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Mätosäkerhet vid kalibrering av referensutrustning för blodtrycksmätning(3794 kB)47 downloads
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