US 11,992,588 B2
Blood hose set, a control device or closed-loop control device, a blood treatment apparatus and a method for the single-needle treatment
Pascal Kopperschmidt, Dittelbrun (DE); and Christian Schlaeper, Wehrheim (DE)
Assigned to Fresenius Medical Care Deutschland GmbH, Bad Homburg (DE)
Appl. No. 17/046,069
Filed by Fresenius Medical Care Deutschland GmbH, Bad Homburg (DE)
PCT Filed Apr. 8, 2019, PCT No. PCT/EP2019/058762
§ 371(c)(1), (2) Date Oct. 8, 2020,
PCT Pub. No. WO2019/197314, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 10 2018 108 492.7 (DE), filed on Apr. 10, 2018.
Prior Publication US 2021/0030938 A1, Feb. 4, 2021
Int. Cl. A61M 1/16 (2006.01); A61M 1/26 (2006.01); A61M 1/30 (2006.01); A61M 1/34 (2006.01); A61M 1/36 (2006.01); A61M 39/10 (2006.01); A61M 39/28 (2006.01)
CPC A61M 1/1601 (2014.02) [A61M 1/16 (2013.01); A61M 1/267 (2014.02); A61M 1/30 (2013.01); A61M 1/301 (2014.02); A61M 1/305 (2014.02); A61M 1/34 (2013.01); A61M 1/3413 (2013.01); A61M 1/3427 (2014.02); A61M 1/3434 (2014.02); A61M 1/3622 (2022.05); A61M 1/36224 (2022.05); A61M 1/36225 (2022.05); A61M 39/105 (2013.01); A61M 39/28 (2013.01); A61M 1/362262 (2022.05); A61M 1/362265 (2022.05); A61M 2205/12 (2013.01); A61M 2205/3331 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A control device for control or closed-loop control of a blood treatment apparatus for treatment of blood by a single-needle method, wherein the blood treatment apparatus to be controlled or closed-loop controlled comprises:
a blood pump connectable to a blood hose set for conveying blood through the blood hose set, wherein the blood pump is operable in a withdrawal direction;
a return pump, arranged to convey fluid towards the blood hose set or to a section thereof and/or towards a patient in a return direction during use of the blood treatment apparatus;
wherein the control device is configured to execute a method by using the blood treatment apparatus, the method encompassing the following steps:
a) operating the blood pump in a withdrawal direction in which blood is withdrawn from a patient blood circuit and pumped along a patient hose line into the blood hose set; and
b) operating the return pump such that blood is pumped out of the blood hose set and pumped back along the patient hose line into the patient blood circuit;
wherein:
steps a) and b) are executed several times alternately;
blood is not stored in a single-needle chamber provided in a blood path or on a blood side between its withdrawal in step a) and its return in step b); and
the method executed by the control device is controlled and/or monitored by or based on an analysis of pressure measurement values and/or by or based on a motor current or an electricity consumption of at least one pump.