| Issue |
J Extra Corpor Technol
Volume 22, Number 2, June 1990
|
|
|---|---|---|
| Page(s) | 98 - 100 | |
| DOI | https://doi.org/10.1051/ject/1990222098 | |
| Published online | 21 August 2023 | |
Technique
A Technique for Automatic Tubing Occlusion in Response to Air Bubble Detection When Using a Centrifugal Pump
Biomedical Engineering Division, Department of Anesthesiology, Baylor University Medical Center, Dallas, TX
* Address correspondence to: A. William Paulsen, PhD, CCE, Director of Anesthesia Research, Department of Anesthesiology, Baylor University Medical Center, 3500 Gaston Ave., Dallas, TX 75246
A double acting pneumatically powered cylinder, energized by an electrically activated solenoid valve, is used to occlude the outflow line from a Bio-Medicus (a) constrained vortex pump. The cylinder is mounted on a tubing guide that is fastened to a pole clamp. A Sarns (b) air bubble detector, placed on the pump inflow line is used to provide the signal to activate the solenoid valve. The outflow occluder is capable of 100% occlusion of 3/8 × 3/32 inch Tygon tubing up to pressures of 2586 mmHg. The occluder system is able to work with many types of bubble detectors and is applicable to any form of nonocclusive pump.
Key words: Automatic tubing occlusion / occluder system
© 1990 AMSECT
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