Blood pump system and method of operation
AssigneeMicroMed Technology, Inc.
InventorGino F. Morello
Life of this patent
Estimating the term…
Abstract
A blood pump system includes a blood pump having a motor with a rotor and a stator. The stator has a plurality of stator windings situated therein. A motor controller is coupled to the motor, and a processor has inputs coupled to the motor controller for receiving a time continuous signal from the pump. The processor is programmed to transform the time continuous signal to the frequency domain, and control the pump and detect excess suction in response to the time continuous signal in the frequency domain.
Claims31
A method of controlling a blood pump, comprising:
- sampling a time continuous signal from the blood pump;
- transforming the sampled time continuous signal to the frequency domain;
- analyzing the sampled time continuous signal in the frequency domain;
- controlling the blood pump in response to the analysis of the sampled time continuous signal in the frequency domain;
- and
- detecting excess suction in response to analysis of distortion in the sampled time continuous signal in the frequency domain.
A blood pump control system, comprising:
- a processor adapted to receive a time continuous signal from a blood pump;
- and
- wherein the processor is programmed to transform the time continuous signal to the frequency domain, and to detect excess suction in response to distortion in the transformed time continuous signal.
A blood pump system, comprising:
- a blood pump comprising a rotor and a stator, the stator including a plurality of stator windings;
- a controller operatively coupled to the pump;
- a processor operatively coupled to the controller and adapted to receive a time continuous signal from the pump;
- and
- wherein the processor is programmed to transform the time continuous signal to the frequency domain, and to detect excess suction in response to distortion in the transformed time continuous signal.
A method of determining heart rate, comprising:
- sampling a time continuous signal from a blood pump at a predetermined sampling frequency for a predetermined time period to obtain a sample N;
- zero padding the sampled time continuous signal to achieve a sample M, where M is greater than N;
- transforming the zero padded time continuous signal to the frequency domain;
- and determining a heart rate based on the frequency domain representation.
Dependencies are inferred from the claim text.