Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1991-12-30
1993-04-27
Hirsch, Paul J.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
128DIG12, 417413, 604153, A61M 100
Patent
active
052058190
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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Humberstone Victor C.
Ross Calvin J.
Warby Richard J.
Bespak plc
Hirsch Paul J.
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