Electrode Coating with Flat Conductive Particles for Tissue Adhesion
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Solution Overview
Problem
Existing high-frequency treatment instruments face challenges in preventing tissue adhesion to electrodes and maintaining low impedance for effective high-frequency current transmission, particularly due to the limitations of coatings used in current designs.
Innovation Solution
A high-frequency treatment instrument with an electrode coated by a mixture of non-conductive and conductive materials, where the conductive material is present in a smaller ratio, incorporating first and second elements with different shapes to enhance electrostatic capacitance and reduce impedance, ensuring the coating is conductive and resistant to tissue adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a coating is formed from a mixture of non-conductive material and conductive material with conductive material at a smaller ratio, then tissue adhesion is prevented, but impedance increases and electrostatic capacitance decreases
Solution Approach 1:
The patent changes the physical and chemical parameters of the coating by incorporating conductive material particles of specific shapes (high aspect ratio, high flatness quotient) and controlling their size distribution. This allows the coating to maintain low impedance and high electrostatic capacitance while using a smaller ratio of conductive material, thus preventing tissue adhesion without compromising electrical performance
Solution Approach 2:
The patent uses a composite coating material consisting of non-conductive material (such as fluorine resin) and conductive material particles. The non-conductive material prevents tissue adhesion while the conductive material particles provide electrical conductivity. By optimizing the composition, particle shapes, and size distribution, the coating achieves both anti-adhesion and low impedance properties simultaneously
2Object-affected harmful factors
If a coating is formed from a mixture of non-conductive material and conductive material with conductive material at a smaller ratio, then tissue adhesion is prevented, but electrostatic capacitance decreases
Solution Approach 1:
The patent optimizes parameters such as particle shape (high aspect ratio, high flatness quotient), particle size distribution, and concentration to maximize electrostatic capacitance. The specific shape characteristics of the conductive material particles increase their surface area and interaction with the electric field, thereby maintaining high electrostatic capacitance even at lower conductive material ratios
Solution Approach 2:
The composite structure combines the dielectric properties of the non-conductive material with the conductive properties of the shaped particles. The non-conductive material provides high dielectric constant and volume, while the conductive particles create conductive pathways and increase interfacial polarization, together achieving high electrostatic capacitance with reduced conductive material content
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 solution effectively reduces impedance and ensures large electrostatic capacitance, allowing for efficient high-frequency current transmission while preventing tissue adhesion, thus improving the treatment process.
Implementation Method 1
the coating ensures large electrostatic capacitance and decreases impedance in circuits where the high-frequency current passes through
Implementation Method 2
the coating being conductive with respect to the high-frequency current
Data Source
AI summary
In an end effector of a high-frequency treatment instrument, a coating covers an outer surface of an electrode, and formed from a conductive mixture obtained by mixing a non-conductive material and a conductive material. The conductive material contained in the mixture includes first elements and second elements, and each of the first elements has a shape with a higher flatness quotient than each of the second elements.