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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.:

US 12558468 B1

PDFFull Text
Date of Patent:
Feb. 24, 2026

Filed:

Dec. 11, 2020

Blood treatment systems

Applicants:

Fresenius Medical Care Holdings, Inc., Waltham, MA (US);

Fresenius Medical Care Deutschland Gmbh, Bad Homburg, DE;

Inventors:

Lynn E. Jensen, Waltham, MA (US);

Stephen A. Merchant, Waltham, MA (US);

Arne Peters, Bad Homburg, DE;

Alexander Heide, Bad Homburg, DE;

Dejan Nikolic, Bad Homburg, DE;

Assignees:

Fresenius Medical Care Holdings, Inc., Waltham, MA (US);

Fresenius Medical Care Deutschland GmbH, Bad Homburg, DE;

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Clare M Perrin

Int. Cl.
CPC ...
A61M 1/16 (2006.01); A61M 1/14 (2006.01); A61M 1/34 (2006.01); A61M 1/36 (2006.01); A61M 39/22 (2006.01);
U.S. Cl.
CPC ...
A61M 1/1656 (2013.01); A61M 1/152 (2022.05); A61M 1/153 (2022.05); A61M 1/154 (2022.05); A61M 1/155 (2022.05); A61M 1/1561 (2022.05); A61M 1/1565 (2022.05); A61M 1/159 (2022.05); A61M 1/166 (2014.02); A61M 1/1696 (2013.01); A61M 1/3434 (2014.02); A61M 1/3643 (2013.01); A61M 39/223 (2013.01); A61M 2205/128 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3584 (2013.01); A61M 2205/3592 (2013.01); A61M 2205/3653 (2013.01); B01D 2313/18 (2013.01); B01D 2313/243 (2013.01);
Abstract

In one aspect, a system includes a blood treatment machine; a dialyzer configured to be coupled to the blood treatment machine, the dialyzer including a dialyzer housing defining a blood inlet and a blood outlet; a bundle of hollow fibers within an interior of the dialyzer housing; a pumping device drivable to force blood received from the blood inlet through lumens of the bundle of hollow fibers and out the blood outlet; a dialysate inlet port in fluid communication with a dialysate flow path that includes space in the interior of the dialyzer housing between the bundle of hollow fibers; and a dialysate outlet port in fluid communication with the dialysate flow path. The system further includes a fluid conditioning system configured to (i) prepare and supply fresh dialysate to the dialyzer via the dialysate inlet port, and (ii) receive spent dialysate from the dialyzer via the dialysate outlet port, recycle the spent dialysate, and supply the recycled dialysate to the dialyzer via the dialysate inlet port.

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