US 12,280,193 B2
Automatic priming of an extracorporeal blood treatment device using a push-pull method
Tobias Wuerschmidt, Hann. Muenden (DE); and Joana Sophie Schiller, Rheine (DE)
Assigned to B. Braun Avitum AG, Melsungen (DE)
Appl. No. 18/028,051
Filed by B. Braun Avitum AG, Melsungen (DE)
PCT Filed Sep. 17, 2021, PCT No. PCT/EP2021/075701
§ 371(c)(1), (2) Date Mar. 23, 2023,
PCT Pub. No. WO2022/063706, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 10 2020 125 291.9 (DE), filed on Sep. 28, 2020.
Prior Publication US 2023/0256151 A1, Aug. 17, 2023
Int. Cl. A61M 1/36 (2006.01); A61M 1/14 (2006.01)
CPC A61M 1/3621 (2013.01) [A61M 1/14 (2013.01); A61M 2205/07 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An extracorporeal blood treatment device prepared for an automatic priming thereof, comprising:
an extracorporeal circuit;
a flow machine connected to the extracorporeal circuit;
a dialysis liquid circuit;
a dialyzer comprising:
a dialysis liquid circuit side defining a portion of the dialysis liquid circuit,
an extracorporeal circuit side defining a portion of the extracorporeal circuit, and
a membrane separating the dialysis liquid circuit side from the extracorporeal circuit side;
a control unit; and
at least one of:
one or more control valves in the dialysis liquid circuit, or
one or more pumps in the dialysis liquid circuit;
wherein the control unit is configured to prime the extracorporeal circuit and the extracorporeal circuit side of the dialyzer by:
controlling the one or more control valves and/or the one or more pumps to generate a build-up of a pressure in a liquid in the dialysis liquid circuit side of the dialyzer, and
controlling the flow machine to alternately perform a push/or press cycle, in which the flow machine pushes air into the extracorporeal circuit from outside the extracorporeal circuit, and a pull/or suck cycle, in which the flow machine pulls air out of the extracorporeal circuit, to thereby support a transfer of the liquid via the membrane from the dialysis liquid circuit side of the dialyzer to the extracorporeal circuit side of the dialyzer.