Gas pressure driven infusion system by hydrogel electrolysis

Details Gas pressure driven infusion system by hydrogel electrolysis Gas pressure driven infusion system by hydrogel electrolysis

1993-02-17

1994-10-11

Rosenbaum, C. Fred

Surgery

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

Infrared, visible light, ultraviolet, x-ray or electrical...

604 49, 604 51, 604145, 604 66, A61M 130

Patent

active

053542649

ABSTRACT:
A drug delivery device is described which utilizes gas pressure from free oxygen and hydrogen derived from the electrolysis of water at the electrodes in negatively charged polymeric hydrogels by electro-osmosis. The gas pressure forces the infusion of the drugs through appropriate means into the body. The rate of electrolysis which produces the oxygen and hydrogen is controlled by an electric current. Therefore the rate of drug delivery can be predetermined and precisely controlled. The current is activated and controlled by an electronic timer or a biomedical control system. The negatively charged hydrogel polymers have mechanical strength and rigidity and allow water to flow through the polymer network toward the cathode ensuring a continuous water supply to the electrodes inside the hydrogel system by electro-osmosis. The hydrogels may be recharged (reswollen) with water or simply replaced. Because the containment of water within the hydrogel structure is not position dependent, gravity plays no part in the gel location within the gas generation unit as in prior art units. Therefore, the contact between the electrodes and water for purposes of electrolysis is position independent.

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