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:
Aug. 24, 2010
Filed:
Mar. 13, 2007
Wei Zhang, Niederwerrn, DE;
Helge Brauer, Heppenheim, DE;
Reiner Spickermann, Burghausen, DE;
Carsten Müller, Euerbach, DE;
Wei Zhang, Niederwerrn, DE;
Helge Brauer, Heppenheim, DE;
Reiner Spickermann, Burghausen, DE;
Carsten Müller, Euerbach, DE;
Fresenius Medical Care Deutschland GmbH, Bad Homburg, DE;
Abstract
A method for determining the hematocrit and/or blood volume during an extracorporeal blood treatment with an extracorporeal blood circuit, in which blood is taken with a blood pump via an arterial cannula and an arterial flexible-tube line and blood is fed back via a venous flexible-tube line and a venous cannula. Pressure is measured in the extracorporeal blood circuit and a change in the hematocrit is determined from a change in the pressure. The respective relationship between hematocrit HKT or blood volume RBV and pressure P in the extracorporeal circuit is stored for various cannula diameters and various blood-flow values. The respective relationship for a given cannula diameter and blood flow is selected. The hematocrit and/or blood volume is determined taking account of the selected relationship.