Positive pressure programmable infusion pump
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United States of America Patent
Stats
-
Dec 22, 1987
Grant Date -
N/A
app pub date -
Feb 3, 1986
filing date -
Feb 3, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A positive pressure positive displacement implantable infusion pump. A positive pressure fluid reservoir maintains infusate for delivery by a positive pressure displacement pump. Infusate is drawn by the pump into a drug pressurant chamber. A check valve prevents backflow into the reservoir. The check valve may independently establish a basal flow rate by not completely sealing in the forward flow direction. The pump pulses to expel and fill the chamber thereby establishing the flow rate, basal or bolus through a restrictor interposed between the chamber and the infusion site. The pump may run in open loop, pre-programmed or externally programmed modes of operation.
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