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:
Jan. 12, 2016
Filed:
Oct. 01, 2010
Pascal Kopperschmidt, Dittelbrunn, DE;
Christoph Bocklet, Bad Bocklet, DE;
Pascal Kopperschmidt, Dittelbrunn, DE;
Christoph Bocklet, Bad Bocklet, DE;
Fresenius Medical Care Deutschland GmbH, Bad Homburg, DE;
Abstract
The present invention relates to devices and methods for inspecting filters for extracorporeal blood treatment devices, e.g., filters for filtering dialysis fluid. The inspection of the filter according to the present invention is based on the measurement of the flow potential before and after changing the fluid flow of an electrolytic fluid between a transversal flow through the semi-permeable membrane of the filter and a longitudinal flow along the semi-permeable membrane of the filter, or vice versa. Changing the flow direction of the electrolytic fluid results in a change to the conductivity proceeding from a base value P to a higher value Por a lower value P, wherein the conductivity readjusts to the base value P after a certain time interval T, T. An improper state of the filter is determined on the basis of the change in conductivity after changing the flow direction of the electrolytic fluid.