초록 ▼

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 vasc

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.

대표청구항 ▼

A surgically implantable reciprocating pump comprising a hollow cylinder, an array of axially spaced coil windings supported by the cylinder, a piston-valve assembly positioned within the cylinder for reciprocal longitudinal movement therein, the piston-valve assembly comprising a diametral supporti

A surgically implantable reciprocating pump comprising a hollow cylinder, an array of axially spaced coil windings supported by the cylinder, a piston-valve assembly positioned within the cylinder for reciprocal longitudinal movement therein, the piston-valve assembly comprising a diametral supporting ring and at least two valve leaflets supported for pivotal motion on spaced axes within the diametral support ring, permanent magnet means having axially spaced magnetic poles producing radially directed magnetic flux which cooperates with the axially spaced coil windings, the permanent magnet means fixedly attached to the piston-valve assembly for movement therewith in response to sequential energization of the coil windings in the array and means for sequentially energizing the coil windings to cause the piston-valve assembly to be drawn to the next sequentially-energized coil winding.