US 11,850,341 B2
Flow balancing devices, methods, and systems
Jeffrey H. Burbank, Manchester, MA (US); Dennis M. Treu, Castle Rock, CO (US); Daniel Joseph Rubery, Jr., Nashua, NH (US); Scott W. Newell, Ipswich, MA (US); James M. Brugger, Newburyport, MA (US); William J. Schnell, Libertyville, IL (US); William K. Weigel, Portland, ME (US); Steven A. White, Hudson, MA (US); Mark T. Wyeth, Andover, MA (US); Jerome James, Vestavia, AL (US); David Desouza, Essex, MA (US); Joseph E. Turk, Jr., North Andover, MA (US); and Garrett Casey, Methuen, MA (US)
Assigned to NxStage Medical, Inc., Lawrence, MA (US)
Filed by NxStage Medical, Inc., Lawrence, MA (US)
Filed on Aug. 2, 2022, as Appl. No. 17/879,455.
Application 17/879,455 is a continuation of application No. 17/097,724, filed on Nov. 13, 2020, granted, now 11,406,744.
Application 17/097,724 is a continuation of application No. 16/381,363, filed on Apr. 11, 2019, granted, now 10,869,958, issued on Dec. 22, 2020.
Application 16/381,363 is a continuation of application No. 15/517,928, granted, now 10,525,182, issued on Jan. 7, 2020, previously published as PCT/US2015/055031, filed on Oct. 9, 2015.
Claims priority of provisional application 62/152,057, filed on Apr. 24, 2015.
Claims priority of provisional application 62/062,764, filed on Oct. 10, 2014.
Prior Publication US 2023/0149606 A1, May 18, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/14 (2006.01); A61M 1/34 (2006.01); A61M 1/16 (2006.01); A61M 1/36 (2006.01)
CPC A61M 1/1605 (2014.02) [A61M 1/14 (2013.01); A61M 1/165 (2014.02); A61M 1/1613 (2014.02); A61M 1/1615 (2014.02); A61M 1/1647 (2014.02); A61M 1/341 (2014.02); A61M 1/3403 (2014.02); A61M 1/3434 (2014.02); A61M 1/3437 (2014.02); A61M 1/3441 (2013.01); A61M 1/3444 (2014.02); A61M 1/3448 (2014.02); A61M 1/3609 (2014.02); A61M 1/3635 (2014.02); A61M 1/34 (2013.01); A61M 1/3607 (2014.02); A61M 2205/05 (2013.01); A61M 2205/058 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3341 (2013.01); A61M 2205/3351 (2013.01); A61M 2205/3355 (2013.01); A61M 2205/3365 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/502 (2013.01); A61M 2205/702 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of maintaining a predefined ratio of flow rates in first and second channels, comprising:
providing a first pump configured to force a fluid through the first channel and a second pump, downstream from the first pump, configured to force the fluid through the second channel;
connecting the first channel and the second channel temporarily to create a continuous flow between the first channel and the second channel;
while the continuous flow is established between the first channel and the second channel, operating the first pump at a first rotation frequency and the second pump at a second rotation frequency, wherein the first rotation frequency and the second rotation frequency are different from each other but a volumetric flow rate through the first pump and the volumetric flow rate through the second pump are substantially equal to each other;
measuring a static pressure of a channel carrying the continuous flow temporarily generated in the connecting; and
adjusting calibration data of at least one of the first pump and the second pump responsively to a result of the measuring.