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:
May. 15, 2012
Filed:
Sep. 08, 2007
Wolfgang Kleinekofort, Kelkheim, DE;
Andreas Wüpper, Büttelborn, DE;
Wolfgang Kleinekofort, Kelkheim, DE;
Andreas Wüpper, Büttelborn, DE;
Fresenius Medical Care Deutschland GmbH, Bad Homburg, DE;
Abstract
The present invention relates to a device and a method for monitoring a patient access, in particular a vascular access in extracorporeal blood treatment, in which a patient's blood is withdrawn from the patient via an arterial conduit and is returned to the patient via a venous conduit. The blood is conveyed by a blood pump, preferably an occlusive blood pump, such as a roller pump. To monitor the vascular access, the electrical AC voltage and/or the alternating current and/or a derived electrical measured variable that is generated by electrostatic charges during operation of the occlusive peristaltic pump is monitored. If the triboelectric AC voltage generated by the blood pump and/or the alternating current and/or the derived electrical measured variable lies within predetermined limits, this indicates that the vascular access is faulty.