Patent ID: 8329450

Claim:
An organ support apparatus, comprising: (a) a fluid circuit defining upstream and downstream legs adapted to be connected to an organ to be supported; (b) a circulation pump connected to the fluid circuit configured to circulate a process fluid in sequence through the upstream leg, the organ, and the downstream leg; (c) a first waveform generator disposed in the upstream leg for impressing a preselected first pressure waveform on the process fluid before it is delivered to the organ, wherein the first waveform generator comprises: (i) a first diaphragm-type pressure regulator; and (ii) a first reference pressure source connected to the pressure regulator; and (d) a second waveform generator connected in the downstream leg of the fluid circuit for impressing a preselected second pressure waveform on the downstream pressure applied to the organ, wherein the second waveform generator comprises: (i) a second diaphragm-type pressure regulator; and (ii) a second reference pressure source connected to the second pressure regulator.