G - Physics – 01 – L
Patent
G - Physics
01
L
354/28, 128/82
G01L 13/00 (2006.01) A61M 5/168 (2006.01) G01L 9/08 (2006.01)
Patent
CA 2029177
The apparatus and method for detecting pressure and occlusion in a fluid line is for use with a fluid line being operated upon Say a positive displacement, peristaltic pump having several cam follower fingers pressings against the fluid line sequentially to force fluid through the line peristaltically. A sensor follower finger is mounted to the cam shaft of the pump among the other peristaltic fingers in order to cyclicly press against the fluid line with a certain degree of force and displacement as the cam shaft rotates. The sensor follower finger includes a strain gauge mounted on the sensor finger to generate a signal indicating the degree of force being applied by the sensor finger against the tubing, and a signal processor unit which receives this force signal and determines the pressure within the fluid line used upon the signal. The signal processor compares the measured pressure with an upstream reference value during an upstream pressure measurement mode, and compares the measured pressure with a downstream reference value during a downstream pressure measurement mode. An alarm may also be provided for indicating if there is an occlusion condition either upstream or downstream when the measured pressure varies significantly from these reference values.
Daoud Adib G.
Everhart Howard R.
Horres C. Russell
Carefusion 303 Inc.
Ivac Corporation
Smart & Biggar
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