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:
Mar. 29, 1994
Filed:
Aug. 07, 1992
Wolfgang Biesel, Ottweiler, DE;
Fresenius AG, , DE;
Abstract
In a separation device for separation of blood into its components, the hematocrit value of the blood to be separated plays a significant role relative to the sedimentation of cellular blood components. Since in blood processing, particularly in the intraoperative area, significant fluctuations of the incoming hematocrit value may occur, for example, due to infused volume expander, irrigation solutions, anticoagulant additives, etc., it is useful for maintenance of a blood separation working with constant values, particularly a constant hematocrit value of the erythrocyte fraction, to take the preset hematocrit value of the blood to be separated into account. According to the invention, the rate of blood flow through the separation device is automatically adjusted as a function of the hematocrit value of the incoming blood.