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Item Information   Holdings       More by this author     Simmons, Mark     Subjects     Membrane oxygenators     Heat exchangers -- Testing     Heart, Mechanical     MSP Thesis.     Browse Catalog     by author:      Simmons, Mark       by title:      An evaluation of per...         MARC Display

An evaluation of performance factor testing for extra-corporeal heat exchangers / by Mark Simmons. by Simmons, Mark Subjects Membrane oxygenators   Heat exchangers -- Testing   Heart, Mechanical   MSP Thesis. Description:  14 leaves : ill., charts ; 29 cm. Contents:  Advisors: Dr. Charles Tritt, Matthew Hietpas Committee members: Dr. Vincent Canino, Dr. John Gassert Introduction -- Methods/materials -- Results -- Discussion -- Appendix A) Diagrams of laboratory circuits B) Laboratory results. The standard method of evaluating heat exchangers incorporated into an oxygenator is using an equation that determines a value called performance factor. The standard testing is performed under specific conditions and all temperatures are at steady state. The belief is that the higher the performance factor, the better the heat exchange, and hence, the better the heat exchanger. Laboratory testing was done to examine the validity of the performance factor testing. A patient model circuit was used to evaluate the heat exchangers during simulated cardiopulmonary bypass. The patient model was cooled to 18 degrees C and then rewarmed to 35 degrees C. The results were compared to the heat exchangers performance factor which was measured using the standard methods. Data obtained demonstrated that the performance factor was not an accurate representation of the performance of the heat exchanger in the dynamic environment, which exists during cardiopulmonary bypass.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .S56 1995 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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