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Volume 5 Journal of Current Research: Cardiology Heart Congress 2018
November 21-22, 2018
2nd Global Heart Congress
November 21-22, 2018 Osaka, Japan
Heat exchange performance of actual and upcoming adult oxygenators
Mathias Allegaert, Gerdy Debeuckelaere and Dries Veroeveren
Universitair Ziekenhuis Antwerpen, Belgium
Statement of the Problem: To standardize the tests for gas exchange capacity and heat exchange capacity of oxygenators used in a
Cardio Pulmonary Bypass (CPB) circuit, the guidelines of the Association for the Advancement of Medical Instrumentation (AAMI)
standards are used by manufacturers of CPB components (1, 2, 3, 4). Unfortunately, this standardized specification is not qualified at
a consistent water flow rate (5). Actual Heater Cooler Units (HCU) use low pressure to achieve the water flow. Since the publication
of mycobacterium chimaera prevention guidelines, different measures have been taken which results in a reduction of the water
flow: location of the HCU outside the operating room with longer tubing as consequence, other type of tubing with a smaller internal
diameter, connectors with shut-off valve. In combination with the difference in heater cooler unit water flow used by the different
manufacturers, the benchmarking results might not be applicable in clinical setting. In order to get consistent results, the different
oxygenators in this benchmark were tested under the same heater cooler conditions.
Method: All manufacturers on the Belgian market were contacted to provide a sample of their actual and/or upcoming oxygenator
(s) with integrated arterial filter for testing purposes. The first part of the study was to quantify the water flow reduction through the
heat exchange compartment of the oxygenator. The reference flow of the heater cooler unit was compared with the measured flow
when the oxygenator was connected. The second part of the study was the time evaluation for rewarming 70 liters of tap water from
18 ºC to 35 ºC.
Findings: We observed a flow reduction between 0.97% and 61.17% and rewarming times between 1h 09’ 00” and 1h 57’ 12”.
Conclusion: New guidelines to evaluate heat exchange performance of oxygenators have to be issued to get consistent, clinical
reproducible benchmarks.
Biography
Mathias Allegaert is a European Board Certified Clinical Perfusionist active in different Belgian hospitals. He has completed his post-graduation in Clinical
Perfusionist at the University of Leuven. He has his expertise in cardiopulmonary bypass, VAD program, is ELSO-Coordinator for the University Hospital of Antwerp
and Reference Person for testing perfusion components and techniques in animal lab settings at the University of Antwerp. He is Secretary and Webmaster of the
BelSECT (Belgian Society of Extracorporeal Technology). In 2016 and 2018 he was part of the Steering Committee of the International Symposium on Perfusion
organized by BelSECT.
Mathias Allegaert et al., Curr Res Cardiol 2018, Volume 5
DOI: 10.4172/2368-0512-C1-002