Pump apparatus for biomedical use
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United States of America Patent
Stats
-
Apr 27, 1993
Issued Date -
N/A
app pub date -
Dec 30, 1991
filing date -
May 11, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An infusion pump includes a piezoelectric actuator located in a housing and operable to deflect a flexible wall of a detachable pump body. The pump body defines a chamber of variable volume with non-return inlet and outlet valves. The pump body is disposable and connected to the housing by a releasable connector which biases the wall into operative engagement with the transducer. The transducer is provided with sense electrodes to measure the amplitude of deflection which is used to trigger alarms indicating the presence of bubbles in the chamber or of occlusion.
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Family
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