Surgery – Controlled release therapeutic device or system – Implanted dynamic device or system
Reexamination Certificate
2011-03-01
2011-03-01
Sirmons, Kevin C. (Department: 3767)
Surgery
Controlled release therapeutic device or system
Implanted dynamic device or system
Reexamination Certificate
active
07896866
ABSTRACT:
In one embodiment, an implantable drug pump device comprises: a port for transferring infusate to the device; a collapsible reservoir for storing infusate received via the port; the port extending through a housing of the device and into the reservoir; the reservoir comprising a bottom surface that moves in relation to an amount of infusate in the reservoir; the bottom surface being connected to an extensible structure; and wherein when the reservoir is at least partially emptied of infusate, the reservoir is in a substantially collapsed state with the bottom surface being disposed above an interior surface of the port and the extensible structure surrounds a portion of the port that extends into the housing.
REFERENCES:
patent: 5443450 (1995-08-01), Kratoska et al.
patent: 5551849 (1996-09-01), Christiansen
patent: 6280416 (2001-08-01), Van Antwerp et al.
patent: 6652510 (2003-11-01), Lord et al.
Acosta Melissa
Advanced Neuromodulation Systems, Inc.
Crawford Christopher S. L.
Lando Peter
Sirmons Kevin C.
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