Symmetric Switching Electrode for Spinal Disc Ablation
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Solution Overview
Problem
The spacing between vertebrae limits the movement and effectiveness of electrosurgical wands during spinal procedures, making it difficult to treat both sides of a disc simultaneously without causing excessive muscle and nerve stimulation, leading to time-consuming and impractical procedures.
Innovation Solution
An electrosurgical system with symmetrically designed upper and lower active electrodes and a dedicated return electrode, along with a controller that cycles the RF energy to alternately create and extinguish plasma near each electrode, allowing for efficient ablation on both sides of the disc without requiring wand repositioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wand with dedicated upper and lower active electrodes is used to simultaneously treat both sides of the disc, then treatment efficiency is improved, but muscle and nerve stimulation becomes excessive
Solution Approach 1:
The controller is configured to cycle the RF energy delivery in a periodic manner, alternating between activating the upper electrode and the lower electrode. This periodic switching allows both electrodes to serve as active electrodes during different time intervals, enabling simultaneous treatment capability while preventing continuous stimulation of both electrodes that would cause excessive muscle and nerve activation.
2Productivity
If the electrosurgical wand is turned over to treat the other side of the disc, then treatment completeness is improved, but procedural time increases
Solution Approach 1:
The electrode configuration is designed to be dynamically switchable between upper and lower active electrodes through controller intervention. This dynamic reconfiguration allows the wand to treat both sides of the disc while remaining inserted, eliminating the need to remove and reposition the wand, thereby completing treatment without time loss.
Solution Approach 2:
The controller cycles RF energy delivery between upper and lower electrodes in a periodic manner, enabling the surgeon to treat both sides of the disc sequentially without removing the wand. This periodic activation pattern completes treatment of both disc sides while maintaining wand insertion, significantly reducing procedural time.
3Object-affected harmful factors
If a single active electrode is used to treat one side of the disc, then muscle and nerve stimulation is reduced, but treatment time increases due to wand repositioning
Solution Approach 1:
The system dynamically switches between upper and lower electrodes as active electrodes during the procedure. This dynamic reconfiguration allows the surgeon to treat both sides of the disc without removing the wand, eliminating the time loss associated with repositioning while maintaining low stimulation levels through controlled, sequential activation.
Solution Approach 2:
The controller implements periodic cycling of RF energy between upper and lower electrodes. This periodic action enables treatment of both disc sides sequentially with controlled stimulation levels, eliminating the need for wand removal and repositioning, thereby reducing procedural time while maintaining safety.
4Adaptability or versatility
If electrode spacing is reduced to fit within narrow vertebral spacing, then device adaptability is improved, but plasma formation and energy delivery become less effective
Solution Approach 1:
The controller cycles RF energy delivery between upper and lower electrodes in a periodic manner. This periodic activation allows sufficient energy to be delivered to each electrode sequentially, maintaining effective plasma formation despite the reduced spacing between electrodes. The time-separated energy delivery compensates for the closer proximity of the electrodes.
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
Enables faster and more efficient tissue treatment in confined spaces, reducing procedural time and patient trauma by ensuring equal opportunity for plasma formation near both electrodes, thus facilitating simultaneous treatment of both sides of the disc.
Implementation Method 1
forming, responsive to the energy, a plasma proximate to the first electrode of the electrosurgical wand
Implementation Method 2
producing energy by a generator of the electrosurgical controller... forming, responsive to the energy, a plasma proximate to the first electrode
Implementation Method 3
ablating a portion of the disc by a plasma proximate to the first electrode of the electrosurgical wand
Data Source
AI summary
Electrosurgical system and related methods that include: producing energy by a generator of an electrosurgical controller, the generator comprises a first terminal coupled to a first electrode of an electrosurgical wand, and the generator comprises a second terminal coupled to a second electrode of the electrosurgical wand; forming, responsive to the energy, a plasma proximate to the first electrode, while the second electrode acts as a return electrode; reducing energy output of the generator such that the plasma proximate the first electrode is extinguished, then producing energy from the generator with the first terminal coupled to the first electrode and the second terminal coupled to the second electrode; and forming, responsive to the energy, a plasma proximate to the second electrode, while the first electrode acts as a return electrode.