US 11,890,401 B2
Dialysis machines and methods of disinfecting a dialysis machine
Helena Jeppsson, Hörby (SE); Jan Sternby, Lund (SE); Thomas Hertz, Lund (SE); Olof Jansson, Vellinge (SE); Sture Hobro, Lund (SE); and Evi Martinson, Södra Sandby (SE)
Assigned to Gambro Lundia AB, Lund (SE)
Filed by GAMBRO LUNDIA AB, Lund (SE)
Filed on Feb. 24, 2022, as Appl. No. 17/679,822.
Application 17/679,822 is a continuation of application No. 16/754,160, granted, now 11,260,154, issued on Mar. 1, 2022, previously published as PCT/EP2017/075930, filed on Oct. 11, 2017.
Prior Publication US 2023/0001062 A1, Jan. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/16 (2006.01)
CPC A61M 1/1688 (2014.02) [A61M 1/165 (2014.02); A61M 1/169 (2013.01); A61M 1/1662 (2014.02)] 26 Claims
OG exemplary drawing
 
1. A dialysis machine comprising:
a feed arrangement arranged to supply a dialysis fluid to a dialyzer during dialysis treatment;
a return arrangement arranged to remove spent dialysis fluid from the dialyzer during dialysis treatment and direct the spent dialysis fluid to an outlet adapted for connection to a drain;
a return recirculation circuit connected to the return arrangement, the return recirculation circuit arranged to direct a fluid of the return arrangement to a fluid loop path that includes (i) at least a portion of the return arrangement and (ii) the return recirculation circuit;
a feed forward arrangement arranged to enable a fluid of the feed arrangement to bypass the fluid loop path and be directed to the drain; and
a controller configured to perform disinfection of at least one of the feed arrangement and the return arrangement, wherein the disinfection is performed by circulating at least one of a disinfectant and a heated fluid through the at least one of the feed arrangement and the return arrangement.