Electrosurgical Electrode Coating for Precise Cutting and Low Tissue Adherence
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Solution Overview
Problem
Conventional electrosurgical electrodes face challenges in achieving precise and narrow applications of electrosurgical energy, leading to potential tissue adherence and damage to non-target areas, and inefficiencies in power usage.
Innovation Solution
The electrodes feature an elongated body with a conductive material and an insulator layer exposing corners, concentrating energy for precise application, and a conductive layer with low friction to prevent tissue adherence, allowing for improved precision and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrosurgical electrodes are used, then electrosurgical energy can be applied to tissue, but the application is not precise and narrow, causing damage to non-target areas
Solution Approach 1:
The electrode blade has different surface properties at different locations: the corners have a first surface roughness while the main surface portions have a second surface roughness. This local differentiation allows corners to concentrate energy for precise cutting while main surfaces prevent tissue adherence, resolving the contradiction between precision and harmful effects.
Solution Approach 2:
The blade surface is segmented into distinct regions with different roughness characteristics - corners versus main surface portions. This segmentation enables different functional zones: corners for precise energy concentration and main surfaces for tissue release, achieving both precision and reduced harmful effects.
2Productivity
If higher power settings are used to achieve precise cutting, then cutting speed increases, but tissue adherence and damage to non-target areas worsens
Solution Approach 1:
By creating local quality differences in surface roughness, the electrode allows high power operation at corners for fast cutting while main surfaces maintain low roughness to prevent adherence, enabling high productivity without harmful effects.
Solution Approach 2:
The patent converts the potential harm of high power settings (tissue adherence and damage) into benefit by using surface roughness differentiation. The corners concentrate energy efficiently for speed while main surfaces prevent the harmful adherence effects, turning high power into a beneficial force without the drawbacks.
3Object-affected harmful factors
If the entire blade surface is made smooth, then tissue adherence is prevented, but energy concentration and cutting precision deteriorates
Solution Approach 1:
Instead of making the entire blade smooth, the patent applies local quality differentiation: corners have higher roughness for energy concentration while main surfaces are smooth for preventing adherence. This resolves the contradiction between adherence prevention and energy concentration.
Solution Approach 2:
The blade surface is segmented into functional zones with different roughness properties. This segmentation allows the corners to maintain high roughness for precise energy concentration while main surfaces remain smooth for tissue release, achieving both objectives simultaneously.
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
The electrodes enable narrower and more precise electrosurgical procedures with reduced energy application to non-target tissues, enhancing procedure quality and speed while operating at lower power settings.
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 electrode can include an elongated body formed from a conductive material and an insulator layer that covers a blade of the elongated body, except at one or more corners of the blade
Data Source
Figure 1
Figure 2A
Figure 2B~2C
AI summary
In an example, an electrode includes an elongated body, a conductive layer, and an insulator layer. The elongated body includes a first conductive material and extends in an axial direction from a proximal end to a distal end. The proximal end is configured to receive electrosurgical energy from the electrosurgical tool. The elongated body includes a blade for at least one of cutting or coagulation of tissue by the electrosurgical energy received from the electrosurgical tool. The conductive layer includes a second conductive material coupled to the blade of the elongated body. The second conductive material is different than the first conductive material. The insulator layer includes a non-conductive material and is coupled to the conductive layer. The insulator layer covers a first portion of the conductive layer, and does not cover a second portion of the conductive layer such that the conductive layer is exposed at the second portion.