Implantable drug infusion reservoir having fluid impelling resil

Details Implantable drug infusion reservoir having fluid impelling resil Implantable drug infusion reservoir having fluid impelling resil

1991-07-08

1993-01-05

Wilson, John J.

Surgery

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

Treating material introduced into or removed from body...

604131, A61M 3700

Patent

active

051766418

ABSTRACT:
An implantable infusion reservoir having a resilient foam member in a rigid housing to urge fluid to an implantation site. The foam member compresses upon charging and then expands to maintain a predetermined pressure characteristic within the fluid. The foam replaces the previously used two-phase propellent and eliminates the need for a hermetic metal bellows. The foam may be either closed celled or open celled, with or without a barrier skin. The device can be conformal to any desired shape and employ various metering techniques to deliver accurate quantities of fluid.

REFERENCES:
patent: 3871377 (1975-03-01), Treace
patent: 4539004 (1985-09-01), Eckenhoff et al.
patent: 4661093 (1987-04-01), Beck et al.
patent: 4668231 (1987-05-01), de Vries et al.
patent: 4687468 (1987-08-01), Gianturco
patent: 4772263 (1988-09-01), Dorman et al.
patent: 4813951 (1989-03-01), Cannon

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