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Setting roller pump occlusion with the transonic HT109 flowmeter
E J Snyder1, H M Harb, J A Cullen
1Department of Biomedical Instrumentation, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania 19106, USA.
ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|January 1, 1997
Summary
Setting roller pump occlusion for extracorporeal membrane oxygenation (ECMO) is faster and safer using an ultrasonic flowmeter. This method avoids opening the circuit, ensuring accuracy before blood prime.
Area of Science:
- Biomedical Engineering
- Medical Devices
- Cardiopulmonary Support
Background:
- Accurate roller pump occlusion is critical for extracorporeal membrane oxygenation (ECMO) safety and efficacy.
- Current methods for setting occlusion can be time-consuming and may require opening the circuit, posing risks.
Purpose of the Study:
- To describe a novel method for rapidly and accurately setting roller pump occlusion using an ultrasonic flowmeter.
- To validate the safety and efficiency of this technique in neonatal ECMO.
Main Methods:
- Utilized the TRansonic HT109 Ultrasonic Flowmeter with a non-invasive transducer.
- Determined total occlusion, then reduced it by a small percentage to achieve a pre-determined partially occlusive setting.
- Applied the method to neonatal ECMO circuits prior to blood priming.
Main Results:
- The ultrasonic flowmeter allowed for quick and accurate occlusion setting.
- The procedure was performed without opening the fluid-filled ECMO apparatus.
- Clinical application in 35 neonatal ECMO cases demonstrated safety, reliability, and efficiency.
Conclusions:
- Ultrasonic flowmetry provides an effective, non-invasive method for setting roller pump occlusion in ECMO.
- This technique enhances the safety and efficiency of ECMO initiation.
- The method is suitable for use before blood priming, minimizing contamination risks.