Patent · US Active

Device and method for monitoring an extracorporeal blood treatment

US10022485B2 · kind B2 · utility

1Cited by

30References

17Claims

0Family size

Assignee

Fresenius Medical Care Deutschland GmbH · DE

Inventors

Arne Peters · Bad Homburg vor der Höhe, DE
Christoph Wiktor · Gelnhausen, DE

Key dates

Filing date	Dec 27, 2010
Grant date	Jul 17, 2018
Priority date	—
Expiry date	May 15, 2032

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2205/3375
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A device and method for monitoring an access to a patient, an extracorporeal blood circuit and/or a dialyzing fluid system includes a centrifugal pump for conveying blood or dialyzing fluid instead of an occluding pump. Centrifugal pumps bring about a large change in flow rate by even a small change in pressure difference across the pump. The device includes a measuring unit for measuring the flow rate of blood or dialyzing fluid conveyed by the centrifugal pump, and a control and computing unit configured to determine an incorrect vascular access or malfunction if a change in measured flow rate Q is more than a predetermined amount. For example, a small drop in pressure in the venous blood line leads to a marked increase in the flow rate of the centrifugal pump, which is used as a basis for the detection of an incorrect vascular access.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.