US 12,222,267 B2
Analysis device and method for analyzing a viscosity of a fluid
Ingo Stotz, Ditzingen (DE); Thomas Alexander Schlebusch, Renningen (DE); and Tobias Schmid, Stuttgart (DE)
Assigned to KARDION GMBH, Stuttgart (DE)
Appl. No. 15/734,489
Filed by KARDION GMBH, Stuttgart (DE)
PCT Filed Jun. 6, 2019, PCT No. PCT/EP2019/064810
§ 371(c)(1), (2) Date Jul. 20, 2021,
PCT Pub. No. WO2019/234169, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 102018208945.0 (DE), filed on Jun. 6, 2018.
Prior Publication US 2022/0050037 A1, Feb. 17, 2022
Int. Cl. G01N 11/04 (2006.01); A61M 60/174 (2021.01); A61M 60/216 (2021.01); A61M 60/422 (2021.01); G01N 33/49 (2006.01); G01N 11/00 (2006.01)
CPC G01N 11/04 (2013.01) [A61M 60/174 (2021.01); A61M 60/216 (2021.01); A61M 60/422 (2021.01); G01N 33/49 (2013.01); G01N 2011/0073 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A cardiac assist system comprising:
an inlet interface having inlet openings;
an outlet interface having outlet openings;
a flow machine comprising:
an impeller coupled to an electric motor;
a connection cable; and
a cannula through which a blood flow can be conveyed by the flow machine from the inlet interface to the outlet interface, the cannula configured to extend along an axis across a patient's aortic valve and be coupled to the connection cable, wherein a tip of the cannula is located at a distal end of the cannula; and
an analysis device configured to analyze a viscosity of blood in a blood flow of the patient, the analysis device comprising:
an ultrasonic element arranged in the tip and configured to generate a sound wave in the blood, wherein the sound wave radiates through the inlet interface into the cannula along the axis and reflects off the blood,
a detection device configured to determine the viscosity of the blood using at least one Doppler parameter of a Doppler spectrum of the sound wave reflected off the blood, wherein the detection device is configured to determine the viscosity using a functional relationship between the Doppler Parameter and the viscosity; and
a provisioning device configured to provide a viscosity signal representing the viscosity of the blood that is detected by the detection device.