Pulsatile Fluid Pump Linear Motor Waveform Control
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Solution Overview
Problem
Existing pulsatile fluid pumps, particularly those designed for blood pumping, struggle to replicate the natural hemodynamic energy and waveform architecture of the human heart, leading to inefficient blood flow and potential damage to the arterial tree.
Innovation Solution
A pulsatile fluid pump system featuring a reciprocating linear motor actuated by a magnet and coil, controlled by a waveform program that adjusts the electrical waveform in real-time based on user-specifiable parameters and sensor outputs, to mimic the natural stroke volume and beat rate of the human heart.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pulsatile fluid pump uses a linear motor with adjustable waveform control to replicate natural heart function, then hemodynamic energy delivery and blood flow efficiency are improved, but device complexity increases due to the need for sophisticated waveform programming and control systems
Solution Approach 1:
The system dynamically adjusts the electrical waveform parameters (amplitude, frequency, shape) in real-time to replicate the natural heart's hemodynamic energy delivery. The controller system modifies the waveform characteristics based on physiological requirements, enabling the pump to adapt its performance continuously rather than operating at fixed parameters.
Solution Approach 2:
The invention changes multiple electrical waveform parameters simultaneously (amplitude, frequency, shape) to achieve natural heart-like pumping action. By modifying these parameters through programmed control, the system replicates the complex hemodynamic energy patterns of the human heart, transforming the pump from a simple mechanical device to a physiologically adaptive system.
2Productivity
If the pump system incorporates real-time waveform modification based on sensor feedback, then blood flow efficiency and patient safety are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The system incorporates sensor feedback mechanisms that monitor blood flow characteristics and other physiological parameters in real-time. This feedback is processed by the controller system, which automatically adjusts the waveform parameters to optimize blood flow efficiency and ensure patient safety, creating a closed-loop control system that adapts to changing physiological conditions.
Solution Approach 2:
The controller system serves multiple functions: it generates the electrical waveform, modifies waveform parameters in real-time, processes sensor feedback, and ensures safe operation. This multi-functional approach consolidates what would otherwise require separate systems into a single integrated control unit, reducing overall system complexity despite the advanced capabilities required.
3Ease of operation
If the pump uses a flexible membrane actuated by a linear motor, then pulsatile fluid flow is achieved, but the ability to replicate natural heart waveform architecture is insufficient without sophisticated control
Solution Approach 1:
The system employs periodic electrical waveforms that are delivered to the linear motor at frequencies and patterns that replicate the natural heart's pumping rhythm. By using periodic rather than continuous or random actuation, the system creates consistent pulsatile flow patterns that mimic physiological conditions, ensuring reliable replication of heart waveform architecture.
Solution Approach 2:
The controller system is pre-programmed with waveform patterns that replicate natural heart function. These preliminary waveform designs are based on physiological data and are prepared in advance, allowing the pump to immediately produce accurate heart-like pumping action when activated without requiring real-time calculation or adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively delivers physiological hemodynamic energy, allowing for natural relaxation of the arterial tree and reducing stress on endothelial cells, thereby improving blood flow efficiency and patient safety.
Implementation Method 1
a reciprocating linear motor having a magnet and a coil, the magnet moving in relation to the coil
Data Source
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AI summary
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.