Patent ID: 9724456
Date: 2017-08-08
CPC Classifications: A61M,G01F

Claim:
1. A dialysis system comprising: a dialysis instrument including a dialyzer arranged (i) to receive blood pumped by the blood pump, (ii) to receive fresh dialysate pumped by the dialysate inlet pump and (iii) such that used dialysate is pumped from the dialyzer by the dialysate outlet pump; and a disposable cassette including a to-dialyzer dialysate pathway carrying dialysate pumped by the dialysate inlet pump and a from-dialyzer dialysate pathway carrying used dialysate pumped by the dialysate outlet pump, wherein at least one of the to-dialyzer dialysate pathway or the from-dialyzer dialysate pathway within the cassette includes a first portion formed at least in part by a flexible sheet and a second portion formed by rigid sidewalls and a rigid outer wall, the second portion defining at least one sensing area so positioned and arranged such that when the disposable cassette is mounted to the instrument, the at least one sensing area is coupled operably with both the emitter and the receiver of the at least one fluid velocity sensor.