Pressure regulated implantable infusion pump

Details Pressure regulated implantable infusion pump Pressure regulated implantable infusion pump

1986-02-03

1988-01-12

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604151, 6048911, 604134, 128DIG12, 417473, A61M 514

Patent

active

047188936

ABSTRACT:
An implantable infusion pump (20) for infusing drugs or other chemical or solutions into the body. A movable diaphragm (26) forming a variable volume drug chamber (22). A fluid piston (32) opposing the force exerted by the diaphragm (26) on the drug solution in the drug chamber (22). The pressure of the fluid piston (32) being controlled by a regulator (33) providing a reference pressure and in fluid communication with the fluid piston (32). The regulator (33) reducing the fluid pressure of the piston fluid (32) as drug solution is expelled from the drug chamber (22) so as to maintain a constant pressure differential between the drug chamber (22) and an infusion site in the body. The implantable infusion pump (20) being readily adaptable to variable or electronic flow control.

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patent: 4447224 (1984-05-01), De Cant, Jr. et al.
patent: 4487603 (1984-12-01), Harris
patent: 4557726 (1985-12-01), Reincke
Implantable Infusion Pumps, Buchwald and Rohde, Department of Surgery, University of Minnesota, .COPYRGT.1984, Year Book Medical Publishers, Inc., pp. 177-221.
Implantable Drug Infusion Devices, Surgical Rounds, Buchwald and Rohde, Department of Surgery, University of Minnesota, Jul. 1984, pp. 16-23.

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