IP Library › Granted Patent US 12,324,906
Granted Patent B2
US 12,324,906 · App. 15/734,010 · Granted Jun 10, 2025

Systems and methods for determining a total blood volume flow in a cardiac support system and vascular support system

Inventors: Hardy Baumbach (Stuttgart, DE); Karin Schneider (Herrenberg, DE); Inga Schellenberg (Stuttgart, DE); Martina Budde (Karlsruhe, DE); Thomas Alexander Schlebusch (Renningen, DE)
Assignee: Kardion GmbH
A61M60/538A61M60/178A61M60/205A61M60/216A61M60/411A61M60/515A61M60/523A61M60/546A61M60/81A61M60/857A61M2205/3368A61M2205/50A61M2205/702
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Quick Facts
Patent No.
US 12,324,906
App. No.
15/734,010
Granted
Jun 10, 2025
Kind
B2
Abstract

The invention relates to a method for determining a total fluid volume flow ( 1 ) in the region of an implanted vascular support system ( 2 ), comprising the following steps: a) determining a reference temperature ( 3 ) of the fluid, b) determining a motor temperature ( 4 ) of an electric motor ( 5 ) of the support system ( 2 ), c) determining the thermal dissipation loss ( 6 ) of the electric motor ( 5 ), d) ascertaining the total fluid volume flow ( 1 ) using the reference temperature ( 3 ), the motor temperature ( 4 ), and the thermal dissipation loss ( 6 ) of the electric motor ( 5 ).

Claims (25)

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.

2. The method according to claim 1 , wherein determining the total fluid volume flow is based in part on a cross-sectional geometry of the aorta in the region of the cardiac support system.

3. A computer readable storage medium storing therein computer-readable instructions that, when executed by a processing unit, cause the processing unit to: determine a reference temperature of blood flowing in a region of a cardiac support system 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 determine the motor temperature of the electric motor of the cardiac support system via the motor temperature sensor of the cardiac support system, determine the thermal dissipation loss of the electric motor via the current sensor of the cardiac support system, and determine a total fluid volume flow of the blood based on the reference temperature, the motor temperature, and the thermal dissipation loss of the electric motor.

4. A cardiac support system comprising: 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, a reference temperature sensor configured to determine a 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.

5. The support system according to claim 4 , further comprising a processing unit configured to determine a total fluid volume flow of the blood in a region of the cardiac support system using the reference temperature, the motor temperature, and the thermal dissipation loss of the electric motor.

6. The support system according to claim 4 , wherein the reference temperature sensor is arranged on the cannula or near a region thereof at a distance from the flow machine.

7. The support system according to claim 4 , wherein the reference temperature sensor is arranged on the cannula or near a region thereof facing away from the electric motor.

8. The support system according to claim 4 , further comprising: a tubular elongated structure comprising a cannula section, the cannula section comprising the cannula, and a motor housing comprising a motor housing section configured to connect to the cannula section, wherein the electric motor is arranged in the motor housing.

9. The support system according to claim 8 , wherein the reference temperature sensor is arranged in a region of the cannula section at a distance from the motor housing section.

10. The support system according to claim 4 , wherein the electric motor is arranged in a motor housing, wherein the motor housing is configured to allow the blood to flow around the motor housing in the aorta.

11. The support system according to claim 8 , wherein the motor housing is configured to allow the blood to flow around the motor housing in the aorta.

12. The support system according to claim 8 , wherein the motor temperature sensor is configured to measure a surface temperature of the motor housing.

13. The support system according to claim 4 , wherein the motor temperature sensor is configured to measure a temperature of a stator of the electric motor.

14. A cardiac support system comprising: a flow machine configured to convey blood, a cannula configured to guide the blood to the flow machine, a reference temperature sensor configured to determine a reference temperature of the blood, an electric motor configured to guide the flow machine, a tubular elongated structure comprising a cannula section, the cannula section comprising the cannula, a motor housing comprising a motor housing section configured to connect to the cannula section, wherein the electric motor is arranged in the motor housing, wherein the motor housing is configured to allow the blood to flow around the motor housing in an aorta, 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.

15. The support system according to claim 14 , further comprising a processing unit configured to determine a total fluid volume flow of the blood in a region of the cardiac support system using the reference temperature, the motor temperature, and the thermal dissipation loss of the electric motor.

16. The support system according to claim 14 , wherein the reference temperature sensor is arranged on the cannula or near a region thereof at a distance from the flow machine.

17. The support system according to claim 14 , wherein the reference temperature sensor is arranged on the cannula or near a region thereof facing away from the electric motor.

18. The support system according to claim 14 , wherein the reference temperature sensor is arranged in a region of the cannula section at a distance from the motor housing section.

19. The support system according to claim 14 , wherein the motor temperature sensor is configured to measure a surface temperature of the motor housing.

20. The support system according to claim 14 , wherein the motor temperature sensor is configured to measure a temperature of a stator of the electric motor.

21. The support system according to Claim 19 , wherein the reference temperature sensor is arranged on the cannula or near a region thereof at a distance from the flow machine.

22. The support system according to Claim 19 , wherein the reference temperature sensor is arranged on the cannula or near a region thereof facing away from the electric motor.

23. The support system according to Claim 19 , wherein the reference temperature sensor is arranged in a region of the cannula section at a distance from the motor housing section.

24. The support system according to Claim 19 , wherein the motor temperature sensor is configured to measure a surface temperature of the motor housing.

25. The support system according to Claim 19 , wherein the motor temperature sensor is configured to measure atemperature of astator of the electric motor.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 21, 2022
From: BAUMBACH, HARDY; SCHNEIDER, KARIN; SCHELLENBERG, INGA; BUDDE, MARTINA; SCHLEBUSCH, THOMAS ALEXANDER
To: ROBERT BOSCH GMBH
Reel/Frame 058722/0906 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 21, 2022
From: ROBERT BOSCH GMBH
To: KARDION GMBH
Reel/Frame 058730/0375 →
SECURITY INTEREST Recorded Apr 26, 2021
From: KARDION GMBH
To: EDWARDS LIFESCIENCES HOLDING, INC.
Reel/Frame 056046/0422 →
Priority Claims (1)
DE 102018208879.9 · Jun 6, 2018 · national
Continuity (1)
Related Publication 20210346677A1 · Nov 11, 2021
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