Biocompatible ventricular assist and arrhythmia control device i

Details Biocompatible ventricular assist and arrhythmia control device i Biocompatible ventricular assist and arrhythmia control device i

1990-05-14

1992-03-24

Jaworski, Francis

Surgery

Cardiac augmentation

600 17, 128419D, A61N 1362

Patent

active

050983695

ABSTRACT:
A ventricular assist device may include a cardiac compression assembly which comprises a gel-filled pad of generally concave configuration, mounted on a pressure plate with peripheral portions of the pad extending beyond the periphery of the plate, to preclude damage to the heart by the peripheral edges of the plate. The gel-filled pad may have undulating opposite sides formed by intersecting rows of raised dimples. The pad also includes portions for suturing the pad to a heart ventricle, and at least some of the dimples on the side of the pad facing the heart ventricle are provided with ventricle tissue growth-promoting islands. An electrode, in the form of a grid having intersecting strips which define dimple-receiving openings therebetween, also may be mounted on the venticle side of the pad. As many as eight circumferentially arranged cardiac compression assemblies, having lower ends pivotally mounted on a support member adapted to be located adjacent the apex of a heart ventricle, may be provided. Operating systems for operating the cardiac compression assemblies may include a motor-driven camming mechanism; a mechanism comprising a device for converting electrical energy to hydraulic fluid energy, two sealed fluid systems, a reversible pump, two bellows and a safety solenoid pump-bypass fluid return valve; or a closed loop system comprising a reversible pump in a fluid supply casing, a hydraulic fluid manifold including a plurality of miniature fluid actuators which may be of arcuate construction to conserve space, and a mechanism for collecting fluid leaking from the actuators and returning it to the fluid supply casing.

REFERENCES:
patent: 4192293 (1980-03-01), Asrican
patent: 4536893 (1985-08-01), Parravicini
patent: 4928674 (1990-05-01), Halperin et al.
patent: 4957477 (1990-09-01), Lundback

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