Surgery – Truss – Pad
Patent
1976-01-29
1978-01-31
Kamm, William E.
Surgery
Truss
Pad
A61N 136
Patent
active
040710327
ABSTRACT:
An implantable living tissue stimulator is described with a current conductive protective shield, to prevent the flow of currents to or from the stimulator circuitry via the electrically conductive body fluid. Also disclosed is an implantable living tissue stimulator of the rechargeable type in which the stimulator circuit components are surrounded by a pickup coil, designed to pick up an external magnetic field for recharging the power source, e.g., battery of the stimulator. One embodiment incorporates one or more ferrite slabs extending through the coil wound about the rest of the stimulator components, in order to increase the coil pick up efficiency and to divert the magnetic field from the stimulator metal components, such as a metal container in which the stimulator circuitry is hermetically sealed and thereby minimize the heating of the components and/or metal container. Also disclosed is a stimulator in which the coil, wound about the stimulator circuit components and the ferrite slabs, is sealed within a ceramic or glass hermetic container which is impervious to body saline fluid or gases.
REFERENCES:
patent: 3195540 (1965-07-01), Waller
patent: 3357434 (1967-12-01), Abell
patent: 3547127 (1970-12-01), Anderson
patent: 3888260 (1975-06-01), Fischell
Tyers et al., "Medical Instrumentation," vol. 8, No. 2, Mar.-Apr. 1974, pp. 178-179.
Kamm William E.
Pacesetter Systems Inc.
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