Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-01-31
1996-07-30
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
6048921, A61M 100
Patent
active
055406653
ABSTRACT:
The present invention provides a gas generating engine for driving a beneficial agent dispensing device. The engine comprising (a) a solid composition comprising an acidic compound or a basic compound, or a combination thereof, and (b) a means for maintaining substantially constant the surface area of the solid composition exposed to a reservoir fluid comprising water, or water and an acidic compound, or water and a basic compound, wherein in operation, the solid composition is exposed to the reservoir fluid which dissolves the solid composition and causes it to generate a gas, the gas being a driving fluid to dispense a beneficial agent. The present invention further provides a fluid driven dispensing device for delivering an agent into an environment of use, the device be driven by the gas generating engine.
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Bura Scott A.
McPhee Mark M.
Mercado Stanley A.
Nat Avtar S.
Yum Su I.
ALZA Corporation
Dillahunty Mary Ann
Ito Richard T.
Stone Steven F.
Yasko John D.
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