Implantable system for delivery of fluid-sensitive agents to ani

Details Implantable system for delivery of fluid-sensitive agents to ani Implantable system for delivery of fluid-sensitive agents to ani

1997-10-08

1999-02-16

Azpuru, Carlos A.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Implant or insert

6048901, 6048921, A61F 202, A61K 922

Patent

active

058717706

ABSTRACT:
A delivery system (10) is disclosed for delivering a fluid-sensitive beneficial agent (7) such as a somatotropin, or an analogue or derivative thereof, to an animal such as a bovine. The delivery system comprises a wall that surrounds an internal compartment, said wall comprising a first wall section that limits the passage of fluid into the system and a second wall section that permits the passage of fluid into the system. An exit passageway is provided for delivering the beneficial agent an interior compartment (18) to the animal. The exit passageway is sealed with a wax seal (30) which is expelled through the passageway (13) as the internal pressure within the device (10) reaches a predetermined "bursting" pressure. The passageway (13) is preferably sized to compensate for slight variations in the efflux of the beneficial agent and to maintaining a sufficient volumetric outflow rate of beneficial agent in order to minimize influx of biological fluids from the external environment back into the device once the seal (30) is expelled.

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