Osmotic delivery device having a two-way valve and a...

Details Osmotic delivery device having a two-way valve and a... Osmotic delivery device having a two-way valve and a...

2006-03-21

2006-03-21

Kennedy, Sharon (Department: 3762)

Surgery

Controlled release therapeutic device or system

Osmotic or diffusion pumped device or system

C424S422000

Reexamination Certificate

active

07014636

ABSTRACT:
An implantable osmotically driven delivery system having a dynamic, two-way valve and a self-adjusting, variable geometry fluid flow channel. As pressure within the agent delivery system increases, the fluid channel narrows, thereby restricting flow. At exceptionally high pressures, the valve can be designed to close altogether at the orifice or delivery end, or it can provide a minimal leak path so that a maximum fluid flow is never exceeded. At zero or very low pressures, the valve will close completely at the beneficial agent reservoir end, isolating the beneficial agent formulation from external fluid infiltration and thereby eliminating diffusion of external fluid into the beneficial agent formulation.

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