The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1992
Filed:
Aug. 13, 1991
Hal C Danby, Sudbury, GB;
Danby Medical Limited, Earls Colne, GB;
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.