Implantable electrically powered medical device

Details Implantable electrically powered medical device Implantable electrically powered medical device

A - Human Necessities

61

N

326/15

A61N 1/36 (2006.01) A61N 1/378 (2006.01)

Patent

CA 1041176

A B S T R A C T An implantable electrically operated medical device, such as a pacemaker, having one or more electrochemical cells and operative electric circuity mounted in an encapsulated covering of epoxy resin which is imper- meable to body fluids. The electrochemical cells generate a hydrogen gas and the encapsulated covering, while being relatively impermeable to hydrogen gas is capable of passing the gas through at a relatively low permeation rate.- Buildup in pressures within the encapsulant occur under increased hydrogen evolution rates from the electrochemical cells and the improved device modifies the shape of the electrochemical cells and reinforces the epoxy resin encapsulant over the corners of the cells to strengthen the en- capsulant covering and increase the burst strength of the device.

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