US 11,793,915 B2
Hemodialysis systems and methods
Michael J. Wilt, Windham, NH (US); Jason A. Demers, Manchester, NH (US); Kevin L. Grant, Litchfield, NH (US); Brian D. Tracey, Litchfield, NH (US); and James D. Dale, Milton, FL (US)
Assigned to DEKA Products Limited Partnership, Manchester, NH (US)
Filed by DEKA Products Limited Partnership, Manchester, NH (US)
Filed on Oct. 4, 2021, as Appl. No. 17/493,758.
Application 16/658,877 is a division of application No. 15/386,546, filed on Dec. 21, 2016, granted, now 10,449,280.
Application 14/262,101 is a division of application No. 13/569,623, filed on Aug. 8, 2012, granted, now 8,721,884.
Application 13/569,623 is a division of application No. 12/072,908, filed on Feb. 27, 2008, granted, now 8,246,826.
Application 17/493,758 is a continuation of application No. 16/658,877, filed on Oct. 21, 2019, granted, now 11,154,646.
Application 15/386,546 is a continuation of application No. 14/262,101, filed on Apr. 25, 2014, granted, now 9,555,179.
Claims priority of provisional application 60/903,582, filed on Feb. 27, 2007.
Claims priority of provisional application 60/904,024, filed on Feb. 27, 2007.
Prior Publication US 2022/0133968 A1, May 5, 2022
Int. Cl. A61M 1/16 (2006.01); A61M 1/34 (2006.01); A61M 1/36 (2006.01); A61M 1/26 (2006.01); A61M 1/14 (2006.01)
CPC A61M 1/1601 (2014.02) [A61M 1/154 (2022.05); A61M 1/155 (2022.05); A61M 1/1561 (2022.05); A61M 1/1565 (2022.05); A61M 1/15625 (2022.05); A61M 1/16 (2013.01); A61M 1/1621 (2014.02); A61M 1/1654 (2013.01); A61M 1/1694 (2013.01); A61M 1/267 (2014.02); A61M 1/3401 (2022.05); A61M 1/341 (2014.02); A61M 1/3413 (2013.01); A61M 1/3424 (2014.02); A61M 1/365 (2014.02); A61M 1/3609 (2014.02); A61M 1/3621 (2013.01); A61M 1/3638 (2014.02); A61M 1/3643 (2013.01); A61M 1/3644 (2014.02); A61M 1/3646 (2014.02); A61M 1/3649 (2014.02); A61M 1/3652 (2014.02); A61M 1/3672 (2013.01); A61M 1/36224 (2022.05); A61M 1/362261 (2022.05); A61M 1/362263 (2022.05); A61M 1/362265 (2022.05); A61M 1/362266 (2022.05); A61M 2205/07 (2013.01); A61M 2205/12 (2013.01); A61M 2205/123 (2013.01); A61M 2205/128 (2013.01); A61M 2205/15 (2013.01); A61M 2205/16 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3324 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/36 (2013.01); A61M 2205/505 (2013.01); A61M 2205/82 (2013.01); A61M 2205/8218 (2013.01); A61M 2205/8225 (2013.01); Y10T 137/87893 (2015.04)] 8 Claims
OG exemplary drawing
 
1. A hemodialysis system, comprising:
a blood path through which blood is drawn from a patient and passed through a dialyzer; the blood path comprising a pump cassette that includes:
a pneumatically actuated diaphragm-based blood flow pump capable of pumping fluid through the dialyzer; and
an air vent in fluid communication with the blood flow pump;
a dialysate path comprising:
the dialyzer;
a first pneumatic actuated diaphragm-based dialysate pump being in valved connection with the dialyzer and a liquid supply; and
a controller for controlling pneumatic actuation pressure delivered to the blood flow pump, the first dialysate pump, one or more blood-path valves and one or more dialysate-path valves, wherein the controller is configured to prime the dialyzer and blood path with liquid, the blood flow pump to pump air from the air vent through the blood path to the dialyzer to push the liquid in the blood path through a membrane of the dialyzer, wherein the controller is configured to detect a rupture of the membrane of the dialyzer when air flow through the dialyzer from the blood flow pump continues after all of the liquid on a blood path side of the dialyzer has been displaced.