IVL Pulse Control for Consistent Spark and Vessel Protection
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Solution Overview
Problem
Traditional intravascular lithotripsy systems face challenges in effectively and safely breaking up calcified lesions due to high stress and strain rates, leading to potential damage or dissection of blood vessel walls, and lack refined control over energy delivery.
Innovation Solution
The system employs a control mechanism with a processor and circuitry to adjust voltage and duration of electrical pulses to electrodes submerged in a fluid-filled member, incrementally increasing energy to achieve effective spark generation and pressure wave creation within predetermined thresholds, ensuring efficient and safe therapy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high pressure and high frequency voltage pulses are applied to break up calcified lesions, then treatment effectiveness is improved, but risk of vessel wall damage increases
Solution Approach 1:
The system dynamically adjusts voltage pulse parameters (amplitude, duration, frequency) in real-time based on feedback from pressure sensors and impedance measurements, allowing optimization of treatment effectiveness while preventing vessel wall damage through continuous parameter adaptation
Solution Approach 2:
The control system incorporates feedback mechanisms that monitor pressure waves, electrical impedance, and power delivery to automatically adjust voltage pulse characteristics, ensuring treatment remains within safe thresholds while maintaining calcified lesion breakdown effectiveness
2Reliability
If voltage pulse energy is increased to improve spark generation consistency, then pressure output durability is improved, but risk of overheating and tissue damage increases
Solution Approach 1:
The system employs periodic voltage pulse delivery with controlled duty cycles and interval timing, allowing sufficient cooling periods between pulses to prevent tissue overheating while maintaining consistent spark generation through repeated cyclic energy delivery
Solution Approach 2:
The control system dynamically modifies voltage pulse parameters including amplitude, width, and frequency based on real-time monitoring of tissue response and power delivery efficiency, optimizing spark consistency while preventing thermal accumulation that could cause tissue damage
3Device complexity
If coarse system controls are used with simple power supply cutoff, then device complexity is reduced, but treatment precision and consistency deteriorate
Solution Approach 1:
The system replaces simple mechanical power supply cutoff with electronic control mechanisms including microprocessors, sensors, and algorithms that precisely regulate voltage pulse delivery, achieving high treatment precision through electronic rather than mechanical control methods
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
This approach allows for more consistent and durable treatment with improved pressure output over a longer number of pulses, reducing the risk of vessel damage and enhancing the effectiveness of calcified lesion breakdown.
Implementation Method 1
applying electrical arc spaced-apart electrodes disposed within a fluid-filled member to creating flow and pressure waves
Data Source
AI summary
Various embodiments of the systems, methods, and devices are provided for controlled operation of an intravascular lithotripsy system for breaking up calcified lesions in an anatomical conduit. More specifically, control arrangements are disclosed concerning managing and/or providing electrical energy to generate an electrical arc between a set of spaced-apart electrodes disposed within a fluid-filled member configured to contain a conductive fluid.