Positive pressure programmable infusion pump

Details Positive pressure programmable infusion pump Positive pressure programmable infusion pump

1986-02-03

1987-12-22

Pellegrino, Stephen C.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604141, 604891, A61M 514

Patent

active

047144629

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.

REFERENCES:
patent: 4077405 (1978-03-01), Haerten et al.
patent: 4265241 (1981-05-01), Portner et al.
patent: 4443218 (1984-04-01), De Cant, Jr. et al.
patent: 4447224 (1984-05-01), De Cant, Jr. et al.
patent: 4486190 (1984-12-01), Reinicke
patent: 4525165 (1985-06-01), Fischell
patent: 4557726 (1985-12-01), Reinicke

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