DEAIRING AND RECIRCULATION SYSTEMS FOR DIALYSIS MACHINES

摘要

DEAIRING AND RECIRCULATION SYSTEMS FOR DIALYSIS MACHINES Stanley J. Pernic There is disclosed herein a deairing system for use in a bedside-console-type dialysis machine. The system includes a selectively adjustable flow controller, a deairing tank, and a suction pump for drawing dialysis solution from the flow controller through the deairing tank and to the pump. The pump is also connected to the deairing tank for applying a negative pressure and for removing gas from the dialysis solution. The tank is provided with a baffle-and-ball-type check valve arrangement for preventing flow of dialysis solution through the gas line. A recirculation loop is provided in conjunction with the pump and includes an air separation tank downstream of the pump and a negative pressure valve which connects the upstream side of the pump and recirculation tank. The air separation tank cooperates with the pump to assure efficeint operation of the pump by minimizing the air drawn through the recirculation loop and to the pump from the separation tank.