Method and apparatus for creating pulsatile flow in a cardiopulm

Details Method and apparatus for creating pulsatile flow in a cardiopulm Method and apparatus for creating pulsatile flow in a cardiopulm

1997-07-31

1999-07-27

Weiss, John G.

Surgery

Blood drawn and replaced or treated and returned to body

422 48, A61M 3700

Patent

active

059281790

ABSTRACT:
Pulsatile cardiopulmonary flow closely approximating a natural heartbeat is generated in a heart-lung machine by using a proportioning valve to partly convey blood in the machine's cardiopulmonary circuit to the arterial supply line, and to partly recycle that blood into the cardiopulmonary circuit upstream of the arterial pump. The relative proportions of conveying and recycling are varied in accordance with a waveform approximating the waveform of a human heartbeat.

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