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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 11828279 B1

PDFFull Text
Date of Patent:
Nov. 28, 2023

Filed:

Dec. 20, 2019

System for monitoring and controlling fluid flow in a hemodialysis apparatus

Applicant:

Deka Products Limited Partnership, Manchester, NH (US);

Inventors:

Michael J. Wilt, Windham, NH (US);

Dirk A. van der Merwe, Canterbury, NH (US);

James D. Dale, Milton, FL (US);

Brian D. Tracey, Litchfield, NH (US);

Kevin L. Grant, Litchfield, NH (US);

Jason A. Demers, Manchester, NH (US);

Catharine N. Flynn, Manchester, NH (US);

Assignee:

DEKA Products Limited Partnership, Manchester, NH (US);

Attorney:

Wolf, Greenfield & Sacks, P.C.

Primary Examiner:

Hayden Brewster

Int. Cl.
CPC ...
F04B 43/073 (2006.01); A61M 1/26 (2006.01); A61M 1/36 (2006.01); A61M 1/16 (2006.01); A61M 1/28 (2006.01); F04B 7/02 (2006.01); F04B 43/00 (2006.01); F17D 3/00 (2006.01); F04B 9/109 (2006.01); F04B 49/06 (2006.01); F04B 49/22 (2006.01); F04B 45/02 (2006.01); F04B 53/16 (2006.01); F04B 53/10 (2006.01); A61M 60/268 (2021.01); A61M 60/113 (2021.01); A61M 60/531 (2021.01); A61M 60/37 (2021.01); F04B 13/02 (2006.01); F04B 53/06 (2006.01); A61M 60/523 (2021.01); A61M 60/43 (2021.01); A61M 60/892 (2021.01); A61M 60/894 (2021.01);
U.S. Cl.
CPC ...
F04B 43/0733 (2013.01); A61M 1/16 (2013.01); A61M 1/1605 (2014.02); A61M 1/166 (2014.02); A61M 1/1639 (2014.02); A61M 1/1656 (2013.01); A61M 1/1664 (2014.02); A61M 1/1666 (2014.02); A61M 1/267 (2014.02); A61M 1/287 (2013.01); A61M 1/3638 (2014.02); A61M 1/3672 (2013.01); A61M 60/113 (2021.01); A61M 60/268 (2021.01); A61M 60/37 (2021.01); A61M 60/523 (2021.01); A61M 60/531 (2021.01); F04B 7/02 (2013.01); F04B 7/0216 (2013.01); F04B 9/109 (2013.01); F04B 13/02 (2013.01); F04B 43/00 (2013.01); F04B 45/02 (2013.01); F04B 49/06 (2013.01); F04B 49/22 (2013.01); F04B 53/06 (2013.01); F04B 53/10 (2013.01); F04B 53/16 (2013.01); F17D 3/00 (2013.01); A61M 60/43 (2021.01); A61M 60/892 (2021.01); A61M 60/894 (2021.01); A61M 2205/12 (2013.01); A61M 2205/128 (2013.01); A61M 2205/15 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3324 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3337 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/502 (2013.01); A61M 2205/52 (2013.01); Y10T 137/0324 (2015.04); Y10T 137/0379 (2015.04); Y10T 137/2521 (2015.04); Y10T 137/85978 (2015.04); Y10T 137/86139 (2015.04);
Abstract

Systems for monitoring fluid flow in an extracorporeal blood circuit are described. The blood circuit of such systems can include plod pump having a pumping chamber of the blood pump separated from a control chamber of the blood pump by a flexible diaphragm. The control chamber can be configured to transmit positive or negative pressure to operate the diaphragm. The system can include a pressure sensor configured to measure pressure in the control chamber of the blood pump, and a controller configured to receive information from the pressure sensor and to control the delivery of pressure to the control chamber of the blood pump. The controller can also be configured to cause the application of a time-varying pressure waveform on the blood pump diaphragm during a fill-stroke of the blood pump, and to monitor a pressure variation in the control chamber measured by the pressure sensor. When so configured, such controller can transmit a value representing a magnitude of the measured pressure variation to a display associated with the extracorporeal blood circuit.

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