Blood pump control using motor voltage measurement
AssigneeBoston Scientific Scimed, Inc.
InventorsMarit Elisabeth Woulfe, Qian Liu, John O'Donnell, Ronald Gunnels
Life of this patent
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Abstract
A percutaneous circulatory support device includes an impeller, a motor configured to rotate the impeller to cause blood to flow through the percutaneous circulatory support device, and a controller operably coupled to the motor. The controller is configured to determine a vascular pressure within a 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.
Claims20
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.
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.
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.
Dependencies are inferred from the claim text.