Heart pump having contractible guide mechanism for pusher plate

Details Heart pump having contractible guide mechanism for pusher plate Heart pump having contractible guide mechanism for pusher plate

1988-11-07

1991-04-09

Cohen, Lee S.

Surgery

Cardiac augmentation

417395, 623003, A61M 112, F04B 4302

Patent

active

050061046

ABSTRACT:
A blood pump is disclosed that is useful as ventricle assist or replacement device comprising a housing having a blood chamber and inlet and outlet ports for the ingress and egress of blood to and from the chamber. A deflectable diaphragm comprises a wall of the blood chamber which upon deflection collapses the blood chamber to urge blood from the chamber out the outlet port. A pusher plate is disposed in association with the diaphragm. The pusher plate includes a collapsible guide mechanism which guides the plate from a first fill position to a second eject position. The guide mechanism can comprise a telescopic guide or straight-line linkage which is collapsible to a first fill position to occupy a substantially lesser space in the housing than when extended to second eject position. The guide mechanism avoids the necessity of a projection from the housing to accommodate a stroke of a guide mechanism. The guide mechanism can be independent of or combined with the drive means.

REFERENCES:
patent: 0019390 (1901-09-01), Rayner et al.
patent: 3263618 (1966-08-01), Carpenter
patent: 3408889 (1968-11-01), Golden
patent: 3518033 (1970-06-01), Anderson
patent: 4334180 (1982-06-01), Bramm et al.
patent: 4334838 (1982-06-01), Fessler et al.
patent: 4518317 (1985-05-01), Inoue
patent: 4525999 (1985-07-01), Inman
patent: 4779614 (1988-10-01), Moise
patent: 4854832 (1989-08-01), Gardner et al.

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