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. 26, 1997
Filed:
Jul. 11, 1995
Bernd Nederlof, St. Wendel, DE;
Fresenius AG, Bad Homburg, DE;
Abstract
Described is a hemo(dia)filtration apparatus (10) with two blood filters (60) and (12) connected in series and a sterile filter (38) connected upstream thereof. The first chambers (64) and (14) and the second chambers (68) and (16) of both blood filters (60) and (12) are connected to one another, respectively, by connecting lines (72) and (74). A means (76) is arranged in one of the connecting lines (72) and (74), which generates a positive transmembrane pressure in the direction of the blood path in one of the blood filters (60, 12) and a negative transmembrane pressure in the direction of the blood path (80) in the other blood filter (12, 60). This eliminates a costly substituate line with additional devices arranged therein, since the dialyzer fluid is passed as a substituate solution through the membrane of the one blood filter directly into the blood. Furthermore, with the use of suitable devices it is possible to precisely determine and individually adjust the filtrate and substituate flows.