{"title":"Designing an extracorporeal deep-hypothermic heat exchanger and optimizing its operating conditions","authors":"F. Mourtada, R. I. Gray","doi":"10.1109/SECON.1992.202255","DOIUrl":null,"url":null,"abstract":"A theoretical study altered the tube and fin dimensions of a commercial hypothermic heat exchanger (HE) used in cardiopulmonary bypass during open-heart surgery to obtain an optimized design (OHE). This OHE was then tested analytically by modeling the patient/HE system with a single-pool body assumption, modified to accommodate for body temperature gradients. Simultaneous solution of the body differential and system HE equations, showed that the OHE could provide the clinically desirable cool-down phase within 20 min, and the warm-up within 30 min for a wide range of patient types and cardiac outputs. precise holding phase temperatures also could be obtained, +or-0.05 degrees C, through optimal control of the HE's water inlet temperature.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"30 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings IEEE Southeastcon '92","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SECON.1992.202255","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
A theoretical study altered the tube and fin dimensions of a commercial hypothermic heat exchanger (HE) used in cardiopulmonary bypass during open-heart surgery to obtain an optimized design (OHE). This OHE was then tested analytically by modeling the patient/HE system with a single-pool body assumption, modified to accommodate for body temperature gradients. Simultaneous solution of the body differential and system HE equations, showed that the OHE could provide the clinically desirable cool-down phase within 20 min, and the warm-up within 30 min for a wide range of patient types and cardiac outputs. precise holding phase temperatures also could be obtained, +or-0.05 degrees C, through optimal control of the HE's water inlet temperature.<>
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