Insulated Electrosurgical Electrode Blade for Precise Energy Delivery
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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 during procedures.
Innovation Solution
The electrodes feature an insulator layer covering a blade except at specific corners, concentrating energy for precise application, and a conductive layer with low friction to prevent tissue adherence, allowing operation at lower power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional electrosurgical electrodes are used, then electrosurgical energy can be applied to tissue, but the energy application is not precise and causes damage to non-target areas
Solution Approach 1:
The electrode blade is designed with an insulator layer that covers most of the blade surface but leaves specific corners exposed. This creates different functional zones: the exposed corners concentrate energy for precise application while the insulated portions prevent energy dispersion to non-target areas. The insulator layer is applied using a dip-coating method where the blade is dipped at a specific angle to ensure uniform coverage except at the corner regions.
2Productivity
If conventional electrosurgical electrodes are used, then cutting and coagulation can be performed, but tissue adherence occurs during the procedure
Solution Approach 1:
The electrode operates at lower power settings due to the concentrated energy delivery through the exposed corners. This parameter change in operating power reduces the thermal energy available for tissue adherence while maintaining effective cutting and coagulation at the target site. The low friction coating further modifies surface properties to prevent tissue sticking.
3Power
If higher power settings are used to ensure effective energy delivery, then electrosurgical procedures can be performed effectively, but tissue adherence increases
Solution Approach 1:
The insulator layer creates localized energy concentration at the exposed corners while the insulated portions prevent energy waste. This allows the electrode to deliver effective power at the target tissue through the concentrated corners without requiring high overall power settings, thereby preventing tissue adherence while maintaining procedural effectiveness.
4Object-generated harmful factors
If the electrode surface is made smooth to prevent tissue adherence, then tissue sticking is reduced, but energy concentration and precision are compromised
Solution Approach 1:
The electrode design combines two surface treatments in different locations: the exposed corners maintain a smooth surface for energy concentration and precise application, while other portions of the blade receive a low friction coating to prevent tissue adherence. This spatial differentiation of surface properties resolves the contradiction between adhesion prevention and energy concentration.
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 design enables narrower and more precise electrosurgical energy application, reducing tissue adherence and damage to adjacent tissues while maintaining effective energy density.
Implementation Method 1
an insulator layer including a non-conductive material and coupled to the elongated body. The insulator layer covers a first portion of the blade. The insulator layer does not cover a second portion of the blade such that the conductive material of the elongated body is exposed at the second portion
Implementation Method 2
an elongated body including a conductive material and extending 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
Implementation Method 3
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 4
a conductive layer with low friction to prevent tissue adherence
Data Source
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.