System and Method for Pumping Fluid Using a Pump Cassette

Abstract

A system and method for pumping fluid using a pump cassette. The system includes a control assembly for operating the pump cassette. A force assembly having a movable member is capable of applying force to the pump cassette to press the pump cassette against the control assembly. The movable member may be an expandable member, such as a bladder.

1 . A system for pumping fluid comprising:
 a pump cassette that includes a pumping chamber, an inlet, an outlet, one or more fluid channels, and a flexible membrane that can be displaced to pump fluid within the pump cassette;   a chassis on which a control assembly is fixably attached, the control assembly having pneumatic channels for actuating the flexible membrane on the pump cassette;   a door hingedly mounted to the chassis, the door including a force assembly for pressing the pump cassette against the control assembly; and   a cassette receptacle interposed between the door and the chassis; wherein   the pump cassette can be supported by the cassette receptacle, and the cassette can be sealingly pressed against the control assembly upon closing the door and actuating the force assembly.