Abstract: The invention relates to a positive displacement pump 1 for conveying medical fluids, which pump has a pumping chamber 5 and a positive displacement element 15, and to a blood treatment apparatus comprising a positive displacement pump 1. In addition, the invention relates to a method for controlling a positive displacement pump 1 for conveying medical fluids. The positive displacement pump 1 according to the invention has an actuation member 20 in operative connection with the positive displacement element 20 for displacing or deforming the positive displacement element in order to convey the fluid into the pumping chamber or out of the pumping chamber, and a drive device 21 for displacing the actuation member 20. A control unit 14 is provided for to controlling the drive device 21 and an inlet valve 12 and outlet valve 13. The actuation member 20 is in operative connection with the positive displacement element 15 via a working chamber 19 that is filled with gas and has a sealed volume.
Type:
Grant
Filed:
December 17, 2017
Date of Patent:
April 12, 2022
Assignee:
Fresenius Medical Care Duetschland GmbH
Inventors:
Arne Peters, Christoph Wiktor, Gokhan Orter
Abstract: The present invention relates to a filter module and to a method of manufacturing a hollow fiber membrane bundle having at least two concentrically arranged filter stages. The present invention furthermore relates to a method of manufacturing a hollow fiber membrane bundle, to a disposable and to a blood treatment apparatus.
Type:
Application
Filed:
July 17, 2012
Publication date:
January 24, 2013
Applicant:
Fresenius Medical Care Duetschland GmbH
Inventors:
Torsten KELLER, Franz Kugelmann, Wolfgang Wehmeyer
Abstract: This invention relates to a container having at least one inlet and/or outlet and containing at least two different solids arranged in layers as well as the use of said container for preparing a dialysate. In particular, a flexible bag is described, having three layers of different solids, where the middle layer consists of a solid which is compatible with the two adjacent layers and thus forms a separating layer between the two other layers. The layers are secured in place during shipping by vacuum packing.
Type:
Grant
Filed:
November 27, 2002
Date of Patent:
December 25, 2007
Assignee:
Fresenius Medical Care Duetschland GmbH
Inventors:
Francois Dumont D'Ayot, Stephany Duplanil, Thomas Graf, Philippe Laffay, Thomas Wild