Implantable drug delivery devices
First Claim
1. A refill container for refilling an implantable drug delivery device comprising:
- a. a tubular housing with inner wall surface having first opening and second opening, said tubular housing containing a drug fluid,b. a needle being attached to the second opening, said needle being in flow communication with the tubular housing,c. a disc situated inside said tubular housing in slidable sealing fit with an inner wall surface, said disc not accessible from outside the housing and being only movable following the flow direction toward the needle when the drug fluid is being removed from the housing through the needle, said disc being exposed to ambient pressure through the first opening.
1 Assignment
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Accused Products
Abstract
The invention relates generally to implantable drug delivery devices. Devices having a single drug chamber configuration, a divided drug chamber configuration and a compact dual-drug configuration are described. The devices have features to prevent clogging of the dispensing catheter and the creation of a local vacuum caused by the dispensing of the drug fluid. Also provided are features of a failsafe refilling process, automatic refill notification, and performance verification process. The divided drug chamber configuration enables frequent or continuous minute doses. A dual-drug chamber configuration uses self-locking refill containers to prevent mismatching between refill containers and drug chambers.
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Citations
3 Claims
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1. A refill container for refilling an implantable drug delivery device comprising:
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a. a tubular housing with inner wall surface having first opening and second opening, said tubular housing containing a drug fluid, b. a needle being attached to the second opening, said needle being in flow communication with the tubular housing, c. a disc situated inside said tubular housing in slidable sealing fit with an inner wall surface, said disc not accessible from outside the housing and being only movable following the flow direction toward the needle when the drug fluid is being removed from the housing through the needle, said disc being exposed to ambient pressure through the first opening. - View Dependent Claims (2)
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3. A refill system of an implantable dual drug delivery device comprising:
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a. a first refill container containing a first drug fluid having a magnet valve with a first polarity, b. a second refill container containing a second drug fluid having a magnet valve with a second polarity, c. a first drug chamber containing a first drug fluid and having an outlet, a septum and a first piston, said septum being attached with a first magnet with first polarity attracting the magnet valve of the first refill container and repelling the magnet valve of the second refill container, d. a second drug chamber containing a second drug fluid and having an outlet, a septum and a second piston, said septum being attached with a second magnet with second polarity attracting the magnet valve of the second refill container, said second polarity being opposite to the first polarity of said first refill container.
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Specification