	US 12,324,906 B2
	Systems and methods for determining a total blood volume flow in a cardiac support system and vascular support system
Hardy Baumbach, Stuttgart (DE); Karin Schneider, Herrenberg (DE); Inga Schellenberg, Stuttgart (DE); Martina Budde, Karlsruhe (DE); and Thomas Alexander Schlebusch, Renningen (DE)
Assigned to Kardion GmbH, Stuttgart (DE)
Appl. No. 15/734,010
Filed by KARDION GMBH, Stuttgart (DE)
PCT Filed Jun. 6, 2019, PCT No. PCT/EP2019/064802 § 371(c)(1), (2) Date Jul. 9, 2021, PCT Pub. No. WO2019/234162, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 102018208879.9 (DE), filed on Jun. 6, 2018.
Prior Publication US 2021/0346677 A1, Nov. 11, 2021
Int. Cl. A61M 60/538 (2021.01); A61M 60/178 (2021.01); A61M 60/205 (2021.01); A61M 60/216 (2021.01); A61M 60/411 (2021.01); A61M 60/515 (2021.01); A61M 60/523 (2021.01); A61M 60/546 (2021.01); A61M 60/81 (2021.01); A61M 60/857 (2021.01)

CPC A61M 60/538 (2021.01) [A61M 60/178 (2021.01); A61M 60/205 (2021.01); A61M 60/216 (2021.01); A61M 60/411 (2021.01); A61M 60/515 (2021.01); A61M 60/523 (2021.01); A61M 60/546 (2021.01); A61M 60/81 (2021.01); A61M 60/857 (2021.01); A61M 2205/3368 (2013.01); A61M 2205/50 (2013.01); A61M 2205/702 (2013.01)]

25 Claims

1. A method for determining a total fluid volume flow of blood in a region of a cardiac support system, comprising: determining a reference temperature of the blood via a reference temperature sensor of the cardiac support system, wherein the cardiac support system comprises: a flow machine configured to convey blood, a cannula configured to guide the blood to the flow machine, wherein the cannula is configured to guide the blood from a ventricle of a heart into an aorta, the reference temperature sensor configured to determine the reference temperature of the blood, an electric motor configured to guide the flow machine, a motor temperature sensor configured to determine a motor temperature of the electric motor, and a current sensor configured to determine at least a current flow through the electric motor or a thermal dissipation loss of the electric motor, determining the motor temperature of the electric motor of the cardiac support system via the motor temperature sensor of the cardiac support system, determining the thermal dissipation loss of the electric motor via the current sensor of the cardiac support system, and determining the total fluid volume flow based on the reference temperature, the motor temperature, and the thermal dissipation loss of the electric motor.