US 11,779,689 B2
Blood treatment systems and methods
Dirk A. van der Merwe, Canterbury, NH (US); Kevin L. Grant, Litchfield, NH (US); and Michael J. Wilt, Windham, NH (US)
Assigned to DEKA Products Limited Partnership, Manchester, NH (US)
Filed by DEKA Products Limited Partnership, Manchester, NH (US)
Filed on Aug. 3, 2021, as Appl. No. 17/393,268.
Application 17/393,268 is a continuation of application No. 15/423,717, filed on Feb. 3, 2017, granted, now 11,103,625.
Application 15/423,717 is a continuation of application No. 13/480,444, filed on May 24, 2012, granted, now 9,717,834.
Claims priority of provisional application 61/498,394, filed on Jun. 17, 2011.
Claims priority of provisional application 61/489,544, filed on May 24, 2011.
Prior Publication US 2021/0361841 A1, Nov. 25, 2021
Int. Cl. A61M 1/16 (2006.01); A61M 5/172 (2006.01); A61M 1/14 (2006.01); A61M 1/34 (2006.01); A61M 1/36 (2006.01); G16H 20/40 (2018.01); A61M 60/268 (2021.01); A61M 1/26 (2006.01); A61M 1/30 (2006.01); A61K 33/00 (2006.01); A61M 60/43 (2021.01); A61M 60/113 (2021.01); A61M 60/851 (2021.01); A61M 60/427 (2021.01); A61M 60/847 (2021.01); A61M 60/837 (2021.01); A61M 60/37 (2021.01); A61M 60/892 (2021.01); A61M 60/894 (2021.01)
CPC A61M 1/1601 (2014.02) [A61K 33/00 (2013.01); A61M 1/14 (2013.01); A61M 1/16 (2013.01); A61M 1/1605 (2014.02); A61M 1/166 (2014.02); A61M 1/1613 (2014.02); A61M 1/1619 (2014.02); A61M 1/1654 (2013.01); A61M 1/1656 (2013.01); A61M 1/1658 (2013.01); A61M 1/1664 (2014.02); A61M 1/1666 (2014.02); A61M 1/1668 (2014.02); A61M 1/1692 (2013.01); A61M 1/267 (2014.02); A61M 1/301 (2014.02); A61M 1/34 (2013.01); A61M 1/341 (2014.02); A61M 1/3413 (2013.01); A61M 1/3609 (2014.02); A61M 1/3621 (2013.01); A61M 1/3627 (2013.01); A61M 1/3672 (2013.01); A61M 5/172 (2013.01); A61M 60/113 (2021.01); A61M 60/268 (2021.01); A61M 60/37 (2021.01); A61M 60/427 (2021.01); A61M 60/43 (2021.01); A61M 60/837 (2021.01); A61M 60/847 (2021.01); A61M 60/851 (2021.01); G16H 20/40 (2018.01); A61M 1/3638 (2014.02); A61M 60/892 (2021.01); A61M 60/894 (2021.01); A61M 2205/12 (2013.01); A61M 2205/15 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3306 (2013.01); A61M 2205/3313 (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 2205/3379 (2013.01); A61M 2205/3569 (2013.01); A61M 2205/3584 (2013.01); A61M 2205/50 (2013.01); A61M 2205/502 (2013.01); A61M 2205/52 (2013.01); A61M 2230/65 (2013.01); Y02A 50/30 (2018.01); Y02A 90/10 (2018.01)] 19 Claims
OG exemplary drawing
 
1. A pumping system comprising:
a pneumatically driven diaphragm pump comprising:
a rigid chamber wall;
a rigid limit structure;
a flexible membrane attached to the rigid chamber wall and interposed between the rigid chamber wall and the rigid limit structure, such that the flexible membrane and rigid chamber wall together define a pumping chamber and the flexible membrane and the rigid limit structure together define an actuation chamber,
an inlet in the rigid chamber wall for allowing liquid to enter the pumping chamber; and
an outlet in the rigid chamber wall for allowing liquid to exit the pumping chamber;
an actuation system that alternately provides either a positive or a negative pressure to the actuation chamber; wherein the actuation system includes:
a first reservoir held at a positive pressure
a second reservoir held at a negative pressure,
a valving mechanism selectively connecting the actuation chamber to one of the first and second reservoirs to control a pressure in the actuation chamber; and
an actuation chamber pressure transducer for measuring a pressure of the actuation chamber; and
a controller that receives pressure information from the actuation chamber pressure transducer and in a first time period controls the valving mechanism to complete at least one full stroke of the flexible diaphragm by moving the flexible diaphragm between a position touching the rigid limit structure and a position touching the rigid chamber wall, the controller being configured to record a full stroke value for a stroke parameter corresponding to each at least one full stroke, and in a subsequent time period to control the valving mechanism to complete partial strokes of the flexible diaphragm by controlling the stroke parameter to be a fraction of the full stroke value.