System for driving a pulsatile fluid pump
Inventors
Vincent, Douglas E. • Bailey, Brian • Bzura, Conrad • Olney, David • Smith, Eric • Naber, Jeffrey P. • Labonté, Judy • Vincent, Kathleen • Murphy, Matthew J. • Shields, Patrick
Assignees
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Publication Number
US-11300119-B1
Publication Date
2022-04-12
Expiration Date
Abstract
A pulsatile fluid pump system for driving a fluid pump assembly includes a reciprocating linear motor having a magnet and a coil, the magnet moving in relation to the coil, the coil having an electrical input. The pulsatile fluid pump system further includes a controller system having an electrical output coupled to the electrical input of the coil, and the controller system is configured to execute a waveform program defining an electrical waveform at the electrical output. The waveform program is configured to control operation of the linear motor by modification of a feature, selected from the group consisting of amplitude, frequency, shape, and combinations thereof, of the electrical waveform at the electrical output. The waveform program is further configured to accept a set of user-specifiable parameters defining the performance of the linear motor and to modify the electrical waveform in response to such parameters.
Core Innovation
The invention relates to a pulsatile fluid pump system for driving a fluid pump assembly. The system includes a reciprocating linear motor having a magnet and a coil, where the magnet moves in relation to the coil and the coil has an electrical input. A controller system provides an electrical output coupled to the electrical input and includes a storage system storing an archetype electrical waveform.
The controller system is configured to execute a waveform program defining an electrical waveform at the electrical output. The waveform program accepts user-provided values of a set of user-specifiable parameters defining performance of the linear motor and reads the archetype electrical waveform from the storage system to generate the electrical waveform by modifying the archetype electrical waveform with respect to amplitude, frequency, shape, and combinations thereof.
Additional embodiments describe a touch-sensitive graphic display that shows user parameters and flow-related values, including average flow rate, stroke volume, and a flow index, and provides near-real-time instantaneous flow rate and instantaneous stroke volume waveforms. Further embodiments describe waveform generation using a multi-piece polynomial spline algorithm responsive to user parameters and sensor outputs.
Claims Coverage
The independent claim family coverage includes 1 independent claim: clm-00001. The main inventive features concern using a waveform program that modifies an archetype electrical waveform for a reciprocating linear motor based on user-provided performance parameters, with additional refinements in dependent claims for user display, flow sensing visualization, spline-based waveform generation, and sensor-output-driven waveform programming.
Archetype-based waveform modification using user-provided parameters
A controller system reads an archetype electrical waveform from a storage system and generates an electrical waveform at an electrical output by modifying the archetype electrical waveform with respect to a feature selected from the group consisting of amplitude, frequency, shape, and combinations thereof, in response to user-provided values for a set of user-specifiable parameters defining performance of the linear motor.
Reciprocating linear motor with magnet/coil controlled by waveform program
The pulsatile fluid pump system includes a reciprocating linear motor having a magnet and a coil, with the magnet moving in relation to the coil, the coil having an electrical input, and a controller system configured to execute a waveform program defining an electrical waveform at the electrical output coupled to the electrical input of the coil.
Near-real-time display of instantaneous flow-rate/stroke-volume waveforms
The pulsatile fluid pump system includes a graphic display in which physical flow characteristics are displayed, including an instantaneous flow rate waveform provided in near real-time.
Multi-piece polynomial spline algorithm for waveform generation
The waveform program repeatedly applies a multi-piece polynomial spline algorithm in response to user-specified parameters defining performance of the linear motor to generate the electrical waveform at the electrical output.
Sensor-output-based waveform generation with user parameters
A set of sensors provides sensor-output signals tied to pumping performance, and the waveform program generates an electrical output waveform based on the sensor outputs and user-provided user-specifiable parameter values.
Overall claim coverage centers on a controller executing a waveform program that modifies a stored archetype electrical waveform for a reciprocating linear motor using user-provided motor-performance parameters, optionally combined with user interface flow visualization, spline-based waveform generation, and sensor-output-driven control.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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