Universal pneumatic ventricular assist device

Details Universal pneumatic ventricular assist device Universal pneumatic ventricular assist device

2007-05-15

2007-05-15

Pezzuto, Robert E. (Department: 3766)

Surgery

Cardiac augmentation

C623S003100, C623S003180, C623S003210

Reexamination Certificate

active

10854567

ABSTRACT:
A pneumatic ventricular assist device (VAD) is disclosed for use in any circulatory support application including RVAD, LAVD, or BIVAD, trans-operative, short-term or long-term, tethered implantable or extracorporeal. In the preferred embodiment, the VAD consists of a soft contoured pump shell and a disposable pumping unit, which includes: a pump sac; an inlet and an outlet (a.k.a. discharge) with one-way valves; and tubing connectors. The valves comprise a cantilevered pair of closely adjacent thin ledges, nicknamed “valve leaflets,” that resemble needle-nose pliers. The valve leaflets permit a one-way flow of blood between them, as an opposite flow pinches the distal ends of leaflets together, thereby closing off the channel between them. This design is specially designed to allow continuous and fluid movement of blood (in one direction) while limiting blood-contacting surfaces.

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