Air emboli detection
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 28, 1981
Grant Date -
N/A
app pub date -
Nov 24, 1978
filing date -
Nov 24, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
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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