Electrosurgical Electrode Insulation Segmentation
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Solution Overview
Problem
During electrosurgery, existing electrosurgical tools often experience stray electrical current that is not used for cutting or coagulation, leading to unintended tissue damage and smoke creation, as well as challenges with insulation material decoupling during procedures.
Innovation Solution
The design of electrosurgical electrodes with geometrical features such as fine edges and teeth, and the strategic application of insulation material through apertures to focus electrical current on the desired tissue target, reducing stray current and enhancing cutting efficiency while preventing insulation material decoupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If insulation material is applied to the electrosurgical electrode, then stray current is reduced and tissue damage is minimized, but the insulation material may decouple from the electrode during the procedure
Solution Approach 1:
The electrosurgical electrode is divided into multiple segments along its length, with insulation material applied selectively to specific segments rather than the entire electrode. This segmentation allows the insulation material to be more effectively anchored at discrete locations, preventing decoupling while maintaining stray current reduction benefits.
Solution Approach 2:
The insulation material is pre-applied to the electrode in a controlled manner during manufacturing, ensuring proper adhesion before the electrode is used in surgery. This preliminary application prevents the insulation material from decoupling during the surgical procedure.
2Productivity
If electrical current is concentrated at the cutting zone, then cutting efficiency is enhanced, but stray current may still cause smoke production and tissue damage
Solution Approach 1:
The electrode design implements local quality by concentrating electrical current precisely at the cutting zone through geometric features such as fine edges and teeth, while insulation material is applied to surrounding areas to prevent stray current. This localized approach enhances cutting efficiency at the target area while minimizing smoke production and tissue damage from stray current.
3Measurement precision
If the electrode geometry is modified to include fine edges and teeth, then current concentration at the cutting zone is improved, but the complexity of electrode manufacturing increases
Solution Approach 1:
The electrode incorporates geometric features such as fine edges and teeth that can be formed through progressive forming techniques. These dynamic geometric variations allow current concentration to be achieved while using manufacturing processes that adapt to the changing cross-sectional geometry, reducing overall manufacturing complexity.
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 effectively reduces stray current, minimizes tissue damage, and decreases smoke production by concentrating electrical energy at the desired cutting zone, while ensuring the insulation material remains securely attached to the electrode.
Implementation Method 1
As the electric current passes through the tissue, an impedance of the tissue converts a portion of the electric current into thermal energy (e.g., via the principles of resistive heating), which increases a temperature of the tissue and induces modifications to the tissue
Implementation Method 2
The at least one layer of insulation material is configured to prevent applying electric current from the first portion of the outer surface to a tissue of a patient
Data Source
AI summary
An electrosurgical tool for conveying electrical energy comprising an elongated electrode extending in an axial direction from a proximal electrode end to a distal electrode end. The distal electrode end defining a working end configured for cutting or coagulation of tissue by way of electrical energy received by the electrosurgical tool. At least one layer of an insulation material covering an outer surface of the working end so that a portion of the outer surface of the working end is not covered by the insulation material. When electrical energy is provided to the elongated electrode, current is only conducted through an exposed portion of the outer surface of the working end. At least one layer of the insulation material prevents current from straying from the outer surface of the working end covered with the insulation material.