Electrosurgical Electrode With 0.5-1.0mm Cross Section
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Solution Overview
Problem
Existing electrosurgical electrodes face challenges when used in the presence of metallic implants or conductive elements, leading to uncontrolled tissue manipulation, electrode erosion, and increased risk of breakage or injury.
Innovation Solution
An electrosurgical electrode with a cross-sectional area of 0.5 mm to 1.0 mm, made from a high-melting-point material like tungsten, molybdenum, or tantalum, is designed with portions R and L aligned parallel to each other and connected by portion C, providing enhanced strength and reduced erosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional wire electrode is used, then the electrode can be formed into a loop shape for tissue manipulation, but the electrode breaks easily and experiences high erosion when metallic implants are present
Solution Approach 1:
The patent changes the cross-sectional parameter of the electrode wire from conventional thin wire to a substantially circular cross-section with specific dimensions (0.5mm to 1.0mm diameter). This parameter change increases the moment of inertia and section modulus, thereby enhancing the electrode's resistance to bending stresses and erosion while maintaining its flexibility for loop formation and tissue manipulation.
2Ease of operation
If a thin wire electrode is used, then the electrode is flexible and can be formed into loops, but the electrode erodes rapidly and breaks when flashover occurs
Solution Approach 1:
The patent modifies the geometric parameters of the electrode by specifying a substantially circular cross-section with a diameter of 0.5mm to 1.0mm. This cross-sectional geometry provides optimal moment of inertia distribution, enhancing flexural strength while maintaining the flexibility needed for forming loops and manipulating tissue during electrosurgical procedures.
3Ease of manufacture
If a conventional electrode cross-section is used, then the electrode is easy to manufacture, but the electrode lacks sufficient strength during unforeseen flashover
Solution Approach 1:
The patent specifies a substantially circular cross-section with a diameter of 0.5mm to 1.0mm, which is an optimal geometric form for wire electrodes. This circular cross-section maximizes the moment of inertia for a given material volume, providing enhanced strength and erosion resistance while maintaining ease of manufacture through standard wire drawing and forming processes.
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 electrode maintains structural integrity during unforeseen flashovers and experiences less material loss due to erosion, ensuring reliable and safe electrosurgical procedures even in the presence of metallic elements.
Implementation Method 1
By the application of a radiofrequency alternating voltage, a plasma is ignited on the electrode so that a plasma is formed on the wire in interaction with the fluid surrounding the electrode
Implementation Method 2
the wire consists of an electrically conductive material with a very high melting point, for example tungsten, molybdenum or tantalum. The melting point should be at least 2000° C., preferably more than 3000° C.
Data Source
AI summary
An electrosurgical treatment can be carried out with an electrode reliably and safely even if metallic elements are present in the region to be treated. For this purpose, an electrode for an electrosurgical handheld instrument is made of an electrically conductive wire, the two ends of the wire being connectable to an electrode carrier of the handheld instrument. The wire has two portions R and L, which are adjacent to the two ends of the electrode carrier and can be aligned parallel to one another and rectilinearly. Next to these two portions R and L, there is a portion C that connects the two portions R and L to one another. The wire has a cross section of from 0.5 mm to 1.0 mm.