US 11,052,180 B2
Balanced flow dialysis machine
Michael E. Hogard, Odessa, FL (US); Donald D. Busby, Tampa, FL (US); Robert W. Childers, Trinity, FL (US); Yuanpang Samuel Ding, Libertyville, IL (US); Katherine M. Holian, Oak Brook, IL (US); Mark E. Jablonski, Naperville, IL (US); Thomas D. Kelly, Highland Park, IL (US); Shincy J. Maliekkal, Glenview, IL (US); Rodolfo G. Roger, Clearwater, FL (US); Donald A. Smith, Salem, WI (US); Atif M. Yardimci, Vernon Hills, IL (US); and Ying-Cheng Lo, Green Oaks, IL (US)
Assigned to Baxter International Inc., Deerfield, IL (US); and Baxter Healthcare SA, Glattpark (CH)
Filed by Baxter International Inc., Deerfield, IL (US); and Baxter Healthcare S.A., Glattpark (CH)
Filed on Mar. 30, 2015, as Appl. No. 14/672,499.
Application 14/672,499 is a continuation of application No. 13/770,662, filed on Feb. 19, 2013, granted, now 8,992,463.
Application 13/770,662 is a continuation of application No. 11/938,083, filed on Nov. 9, 2007, granted, now 9,415,150.
Prior Publication US 2015/0258263 A1, Sep. 17, 2015
Int. Cl. A61M 1/14 (2006.01); A61M 1/16 (2006.01); A61M 1/28 (2006.01); A61M 1/34 (2006.01)
CPC 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 1/1635 (2014.02); A61M 1/1696 (2013.01); A61M 1/28 (2013.01); A61M 1/284 (2014.02); A61M 1/288 (2014.02); A61M 1/341 (2014.02); A61M 1/342 (2013.01); A61M 1/3413 (2013.01); A61M 1/3417 (2014.02); A61M 1/3427 (2014.02); A61M 1/3434 (2014.02); A61M 1/3437 (2014.02); A61M 1/3441 (2013.01); A61M 1/3444 (2014.02); A61M 1/3458 (2014.02); A61M 1/3465 (2014.02); A61M 1/3468 (2014.02); A61M 2205/12 (2013.01); A61M 2205/3334 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A renal therapy system comprising:
a dialyzer;
a balancing system configured to equalize flow volume of renal failure therapy fluid flowing to the dialyzer and from the dialyzer, the balancing system including a fresh renal therapy fluid portion and a spent renal therapy fluid portion;
a fresh renal therapy fluid pump positioned and arranged to pump fresh renal therapy fluid to the fresh renal therapy fluid portion of the balancing system;
a spent renal therapy fluid pump positioned and arranged to pump spent renal therapy fluid to the spent renal therapy fluid portion of the balancing system;
a fresh renal therapy fluid pressure sensor positioned and arranged to detect a pressure of the fresh renal failure therapy fluid delivered from the fresh renal therapy fluid pump or from the fresh renal therapy fluid portion of the balancing system;
a spent renal therapy fluid pressure sensor positioned and arranged to detect a pressure of the spent renal failure therapy fluid delivered from the spent renal therapy fluid pump or from the spent renal therapy fluid portion of the balancing system; and
a controller configured to (i) receive and compare signals from the fresh and spent renal therapy fluid pressure sensors indicative of the detected pressures of the fresh and spent renal failure therapy fluids, respectively, and (ii) based on the comparison select the higher of the pressure signals as feedback to control the fresh renal therapy fluid and the spent renal therapy fluid for the balancing system so that a pressure of the fresh renal failure therapy fluid flowing from the balancing system is equal to a pressure of the spent renal failure therapy fluid flowing from the balancing system.