Electrosurgical Wand with Selective Electrode Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrosurgical systems face challenges in seamlessly transitioning between ablation and coagulation modes due to the fixed physical size and placement of electrodes, limiting their functional versatility during surgical procedures.
Innovation Solution
The electrosurgical system incorporates a wand with a flexible configuration of electrodes, allowing for adjustable active and return electrode arrangements, coupled with a controller that enables dynamic voltage control and mode switching via a foot pedal assembly, facilitating precise control over energy delivery for various tissue treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a relatively small active electrode is used with a proximally-located larger return electrode for ablation mode, then tissue ablation precision is improved, but coagulation effectiveness deteriorates due to insufficient surface area
Solution Approach 1:
The system dynamically switches between different electrode configurations based on the operational mode. The controller selectively activates specific electrodes to create either a small active electrode with proximal return electrode configuration for ablation, or a large active electrode with distal return electrode configuration for coagulation, allowing the system to adapt its electrical characteristics to the required surgical function
Solution Approach 2:
The system changes the electrical parameters by selectively controlling which electrodes are active and which are return electrodes. By changing the voltage output and electrode selection, the system transforms the same physical electrode array into different functional configurations, altering the effective surface area and current distribution to match the desired surgical outcome
2Adaptability or versatility
If relatively large active and return electrodes are used along the side of the electrosurgical wand for coagulation mode, then coagulation effectiveness is improved, but tissue ablation precision deteriorates
Solution Approach 1:
The system dynamically reconfigures the electrode roles and activation patterns based on the selected mode. For ablation, it activates a subset of electrodes to create a focused, small effective active electrode. For coagulation, it activates multiple electrodes including distal return electrodes to create a large effective active electrode, thereby dynamically adapting the electrical field distribution to the surgical requirement
Solution Approach 2:
The same physical electrode array serves multiple functions by being selectively controlled. The controller enables the electrode system to perform both precise ablation and effective coagulation by changing which electrodes are activated and their assigned roles, making the system universally capable of different surgical tasks without requiring separate wands
3Device complexity
If the electrosurgical system uses fixed electrode configuration, then device simplicity is improved, but functional versatility deteriorates when transitioning between ablation and coagulation modes
Solution Approach 1:
The system changes operational parameters (voltage output and electrode selection) to achieve different functions from the same physical configuration. The controller selectively activates specific electrodes and adjusts voltage levels to create appropriate electrical fields for ablation or coagulation, maintaining physical simplicity while achieving functional versatility through parameter modulation
Solution Approach 2:
The system introduces dynamic control through the controller that selectively activates electrodes based on the operational mode. This dynamic switching capability allows the fixed physical electrode array to function adaptively, transitioning between ablation and coagulation modes by changing which electrodes are active and their assigned roles, thereby achieving versatility without physical reconfiguration
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 configuration enhances the system's ability to adapt to different surgical needs, providing precise tissue ablation and coagulation capabilities while minimizing tissue damage and ensuring effective hemostasis, thus improving surgical efficiency and versatility.
Implementation Method 1
electrosurgical systems use high frequency electrical energy to remove soft tissue
Implementation Method 2
the electrosurgical device may aid the surgeon in reducing internal bleeding by assisting in the coagulation and/or sealing of vessels
Data Source
AI summary
Electrosurgical system with selective control of active and return electrodes. At least some of the illustrative embodiments are systems comprising an electrosurgical wand and an electrosurgical controller. The wand comprises a non-conductive outer surface, at least three electrodes disposed on a distal end of the wand, and at least three electrical leads extending from a proximal end of the wand (one electrical lead electrically coupled to each electrode). The controller comprises a voltage generator and a control circuit coupled between the voltage generator and the electrodes of the wand. The control circuit is configured to: selectively electrically couple the active terminal singly and in combination to the electrodes of the wand; and selectively electrically couple the return terminal singly and in combination to electrodes of the wand.