Apparatus for detecting fluid line occlusion

Details Apparatus for detecting fluid line occlusion Apparatus for detecting fluid line occlusion

1990-11-06

1992-04-07

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340611, 417 63, 604 67, 128DIG13, G08B 2100

Patent

active

051032112

ABSTRACT:
An apparatus and method for detecting pressure and occlusion in a fluid line is for use with a fluid line being operated upon by a positive displacement, peristaltic pump having several cam follower fingers pressing against the fluid line 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 and displace the fluid line by a predetermined amount 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 which receives this force signal and determines the pressure within the fluid line based upon the signal. The signal processor determines the existence of an occlusion based on the signal and provides an alarm if an occlusion is determined.

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