Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1991-12-03
1993-03-02
Green, Randall L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604247, 128DIG12, 417479, A61M 100
Patent
active
051905272
ABSTRACT:
An intravenous metering device is provided which includes an air retention chamber in downstream fluid communication with a source of fluid and in upstream fluid communication with a pumping chamber. A first valve is provided between the air retention chamber and the pumping chamber to control access to the pumping chamber. A second valve is provided to control the exit of fluid from the pumping chamber. The valves include a shared diaphragm portion. A safety mechanism as provided to prevent accidental free flow of fluid through the metering device. In a first preferred embodiment of a safety mechanism, a gradually tapered priming stem is provided attached to the diaphragm portion of the second valve. In a second preferred embodiment of a safety mechanism, a priming stem is provided attached to the diaphragm portion of the second valve and a priming stem release mechanism is further provided.
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Hamilton Dannie E.
Scola Roberta
Baxter International Inc.
Flattery Paul C.
Green Randall L.
Jones Mary Beth O.
Rockwell Amy L. H.
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