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:
Sep. 23, 2003
Filed:
Jan. 04, 2000
Hans-Dietrich Polaschegg, Koestenberg, AT;
Other;
Abstract
Stenosis in a blood access circuit (graft, fistula) or in an extracorporeal circuit are detected by monitoring pressure pulses in the extracorporeal circuit created either by the heart or by the peristaltic blood pump of the extracorporeal circuit. By monitoring pressure pulses created by the. peristaltic blood pump loss of occlusion of the blood pump can be detected. Measurement of the pressure pulses is done either with sensors already built into the blood treatment equipment or, according to the invention, with sensors mechanically coupled to the wall of the blood tubing. The deviation of a pressure pulse amplitude proportional signal from a predetermined value indicates stenosis or loss of occlusion, respectively.