Granted Patent B2

US 12,728,254 · App. 18/388,118 · Granted Sep 8, 2026

Inventors: Marit Elisabeth Woulfe (Ramsey, MN); Qian Liu (Plymouth, MN); John O'Donnell (Tipperary, IE); Ronald Gunnels (Rogersville, MO)

Assignee: Boston Scientific Scimed, Inc.

A61M60/122A61M60/216A61M60/422A61M60/531A61M60/538A61M60/90A61M2205/3303A61M2205/3331A61M2205/3365A61M2230/005A61M2230/30

Abstract

Claims (43)

1 . A percutaneous circulatory support device, comprising:

a housing configured to be positioned within a patient;

an impeller carried within the housing;

a motor configured to rotate the impeller relative to the housing to cause blood to flow through the housing; and

a controller operably coupled to the motor, the controller being configured to determine:

a vascular pressure within the patient;

a working voltage applied to the motor to cause the motor to rotate the impeller;

a working speed of the motor caused by providing the working voltage to the motor;

a blood flow parameter based on the vascular pressure, the working voltage, and the working speed; and

a cardiac performance parameter based on the blood flow parameter.

2 . The percutaneous circulatory support system of claim 1 , further comprising a pressure sensor operably coupled to the controller, wherein the controller is configured to determine the vascular pressure within the patient via the pressure sensor.

3 . The percutaneous circulatory support system of claim 1 , wherein the motor comprises a plurality of motor windings, and the controller is configured to determine the working speed of the motor based on voltage fluctuations in the plurality of motor windings.

4 . The percutaneous circulatory system of claim 1 , wherein the controller determines the blood flow parameter by using a mathematical function comprising the vascular pressure, the working voltage, and the working speed.

5 . The percutaneous circulatory support system of claim 4 , wherein the mathematical function comprises a square of the vascular pressure.

6 . The percutaneous circulatory support system of claim 4 , wherein the mathematical function comprises a square of the working voltage.

7 . The percutaneous circulatory support system of claim 4 , wherein the mathematical function comprises a square of the working speed.

8 . The percutaneous circulatory support system of claim 4 , wherein the mathematical function comprises a product of the vascular pressure and the working voltage.

9 . The percutaneous circulatory support system of claim 4 , wherein the mathematical function comprises a product of the vascular pressure and the working speed.

10 . The percutaneous circulatory support system of claim 4 , wherein the mathematical function comprises a product of the working voltage and the working speed.

11 . The percutaneous circulatory support system of claim 4 , wherein the mathematical function comprises a product of the vascular pressure, the working voltage, and the working speed.

12 . A method of operating a percutaneous circulatory support device positioned in a patient, the device comprising an impeller, a motor configured to rotate the impeller to cause blood flow within the patient, and a controller operably coupled to the motor, the method comprising:

determining, via the controller, a vascular pressure within the patient;

determining, via the controller, a working voltage applied to the motor to cause the motor to rotate the impeller;

determining, via the controller, a working speed of the motor caused by providing the working voltage to the motor;

determining, via the controller, a blood flow parameter based on the vascular pressure, the working voltage, and the working speed; and

determining, via the controller, a cardiac performance parameter based on the blood flow parameter.

13 . The method of claim 12 , further comprising modifying operation of the percutaneous circulatory support device based on the cardiac performance parameter.

14 . The method of claim 12 , further comprising determining, via the controller, contractability of cardiac function of the patient by varying the working speed of the motor.

15 . The method of claim 12 , further comprising segmenting, via the controller, waveforms of the working voltage.

16 . A percutaneous circulatory support device, comprising:

a housing configured to be positioned within a patient;

an impeller carried within the housing;

a motor configured to rotate the impeller relative to the housing to cause blood to flow through the housing; and

a controller operably coupled to the motor, the controller being configured to determine:

a working voltage applied to the motor to cause the motor to rotate the impeller;

a blood flow parameter using a mathematical function comprising a square of the working voltage; and

a cardiac performance parameter based on the blood flow parameter.

17 . The percutaneous circulatory support system of claim 16 , wherein the controller is further configured to determine a vascular pressure within the patient, and the mathematical function further comprises a square of the vascular pressure.

18 . The percutaneous circulatory support system of claim 16 , wherein the controller is further configured to determine a working speed of the motor caused by providing the working voltage to the motor, and the mathematical function further comprises a square of the working speed.

19 . The percutaneous circulatory support system of claim 16 , wherein the controller is further configured to determine a vascular pressure within the patient, and the mathematical function further comprises a product of the vascular pressure and the working voltage.

20 . The percutaneous circulatory support system of claim 16 , wherein the controller is further configured to determine:

a vascular pressure within the patient;

a working speed of the motor caused by providing the working voltage to the motor; and wherein the mathematical function further comprises a product of the vascular pressure, the working voltage, and the working speed.

Assignments (1)

Continuity (2)

References Cited (122)