Unfocused Electrohydraulic Lithotripter with Multi-Probe Shockwave Generation
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Solution Overview
Problem
Conventional electrohydraulic lithotripters are limited by the complexity of design, cost, and performance capabilities due to the use of a single focused electrode, which restricts the size of generated wave fronts and treatment options.
Innovation Solution
The development of an electrohydraulic lithotripter that utilizes a plurality of electrohydraulic probes, each with a first and second electrode, to produce unfocused shockwaves that radiate from the distal end of the probes, allowing for varied shockwave strengths, wave front sizes, and patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single focused electrode is used to maximize shockwave impact at a focal point, then the shockwave strength at the focal point is improved, but the device complexity and cost increase
Solution Approach 1:
The patent divides the single electrode system into multiple separate electrodes (first electrode and second electrode positioned at different locations). Each electrode generates its own shockwave, and by coordinating multiple simpler electrode units, the system achieves focused shockwave impact without the complexity of a single complex focused electrode design.
2Strength
If a single focused electrode is used to maximize shockwave impact at a focal point, then the shockwave strength at the focal point is improved, but the cost of the device increases
Solution Approach 1:
By segmenting the electrode system into multiple simpler electrodes rather than one complex focused electrode, the patent reduces manufacturing complexity and cost. Each electrode can be manufactured independently using standard techniques, avoiding the need for precision engineering of a single complex focused electrode structure.
Solution Approach 2:
The patent combines the functionality of multiple electrodes to achieve the same effect as a single focused electrode would provide. By merging the shockwave generation capabilities of several electrodes and coordinating their operation, the system achieves focused impact at the treatment site while using simpler, more cost-effective individual components.
3Strength
If a single focused electrode is used, then the shockwave impact is maximized at the intended focal point, but the size of generated wave fronts is limited
Solution Approach 1:
The patent merges the wave fronts from multiple electrodes to create a larger overall wave front size. By positioning electrodes at different locations and coordinating their discharge, the individual wave fronts combine to cover a broader treatment area while maintaining focused impact at the target focal point through constructive interference.
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 enables the creation of larger wave fronts, stronger shockwaves, and diverse wave shapes, enhancing treatment options for tissues such as tumors, decubitus ulcers, and bone spurs, while reducing the complexity and cost of the device.
Implementation Method 1
an electric arc between the first electrode and the second electrode produces a shockwave
Implementation Method 2
produces a shockwave that radiates from the distal end of the probe
Data Source
AI summary
Electrohydraulic lithotripters comprising a plurality of electrohydraulic probes are disclosed. Each probe of the plurality of probes comprise a first electrode and a second electrode positioned at a distal end of the probe such that when the probe is discharged, an electric arc between the first electrode and the second electrode produces a shockwave that radiates from the distal end of the probe. A first probe and a second probe of the plurality of probes may be configured to discharge simultaneously or sequentially.