Larson, Jr., Carl O.; Smith, James S.; Chapman, John H.; Slimon, Scot A.; John, Trahan D.; Robert, J. Brozek; Franco, Alberto; McGarvey, John J.; Rosen, Marvin E.; Pasque, Michael K.;

Surgically implantable power supply

In one embodiment described in the specification, a surgically implantable reciprocating pump employs a check valve as the piston, which is driven by a permanent magnet linear electric motor to assist either side of the natural heart. The pump is implanted in the aorta or pulmonary artery using vascular attachment cuffs such as flexible cuffs for suturing at each end with the pump output directly in line with the artery. The pump is powered by surgically implanted rechargeable batteries. In another embodiment, pairs of pumps are provided to replace or assist the natural heart or to provide temporary blood flow throughout the body, for example, during operations to correct problems with the natural heart.

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We claim:

1. A surgically implantable power supply comprising battery means for providing a source of power, charging means for charging the battery means, enclosure means isolating the battery means from the human body, gas holding means within the enclosure means for holding gas generated by the battery means during charging, seal means in the enclosure means arranged to rapture when the internal gas pressure exceeds a certain value and inflatable gas container means outside the enclosure means to receive gas from within the enclosure means when the seal means has been ruptured.

2. A method for venting gas in a surgically implantable power supply comprising the steps of:

providing a battery means, charging means for charging the battery means, enclosure means isolating the battery means from the human body, gas holding means within the enclosure means for holding gas generated by the battery means during charging, seal means in the enclosure means, and inflatable gas container means outside the enclosure means to receive gas from within the enclosure means when the seal means has ruptured,

rupturing the seal means when the internal gas pressure exceeds a certain value, and

receiving gas in the inflatable gas container means.