Surgery – Respiratory method or device – Ozone or ion generation
Patent
1978-11-24
1981-07-28
Michell, Robert W.
Surgery
Respiratory method or device
Ozone or ion generation
422 45, 210 94, A61M 514
Patent
active
042804957
ABSTRACT:
Air emboli detection method and apparatus for use in cardiopulmonary bypass surgery or the like comprising modular sensor, control and power units. The sensor unit is adapted to releasably clamp a blood flow tubing or conduit in a vertical orientation below a blood deaerator, and includes an LED infrared source and a phototransistor detector. The control unit applies pulsed power to the light source only at preselected periodic intervals, and monitors for an output from the detector only at times corresponding to the preselected intervals to achieve an enhanced signal-to-noise ratio. The power unit includes a solid state relay responsive to detection of emboli for removing power from a blood pump or the like.
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Jaworski Francis J.
Michell Robert W.
Sarns, Inc.
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