Arrangement for monitoring fluid flow during intravenous supply

Details Arrangement for monitoring fluid flow during intravenous supply Arrangement for monitoring fluid flow during intravenous supply

1991-08-13

1992-10-13

Hirsch, Paul J.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

128DIG13, A61M 100, A61M 500

Patent

active

051547007

ABSTRACT:
An arrangement for monitoring the pressure of fluid flowing through pliant tubing forming part of a system for the intravenous supply of fluids to a patient under medical treatment in which the tubing is caused to assume an elongate cross-section and a linear voltage displacement transducer having a spring loaded plunger is arranged to apply pressure in a flattened region of the tubing wall to provide indications of contact area movement and thus variations in fluid pressure. Compensation for movement of the contact area after pressure is applied due other than to variations in pressure is provided by a sampler which regularly samples the output of tranducer and provides inputs to a comparator directly and via a shift register so that one sample is compared with an immediately preceding sample. If the difference exceeds the threshold of a threshold circuit, which is indicative of fluid pressure change, an alarm is sounded.

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