Surgery – Controlled release therapeutic device or system – Implanted dynamic device or system
Patent
1983-05-13
1985-03-19
Coven, Edward M.
Surgery
Controlled release therapeutic device or system
Implanted dynamic device or system
604131, 604892, A61M 700
Patent
active
045057109
ABSTRACT:
A drug dispensing device for in-vivo implantation has a diaphragm defining a movable wall of a container for drug fluid, the diaphragm being moved by expanding gas volumes differentially activated by electric heater means controlled by a calendar-clock to induce drug fluid through a constant flow valve in one wall of the container and into the living organism, discretely, or continuously over a period of time or at intervals controlled by the clock. The container is refilled with fresh drug by injection through the skin and a puncturable seal valve while the diaphragm is actuated in a reverse direction by heater activation. The dispensing program can be changed externally by electromagnetically coupled signals; the controller batteries can be similarly recharged by external coupling to a power source. Freshness of the drug and the size of the container determine the time between refills.
REFERENCES:
patent: 3951147 (1976-04-01), Tucker et al.
patent: 4056095 (1977-11-01), Rey et al.
patent: 4112947 (1978-09-01), Nehring
patent: 4140122 (1979-02-01), Kuhl et al.
patent: 4335835 (1982-06-01), Beigler et al.
patent: 4360019 (1982-11-01), Portner et al.
Coven Edward M.
English James T.
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