Electrosurgical Electrode Conjoining Edge Linear Transition Zone
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Solution Overview
Problem
Electrosurgical instruments face challenges in achieving effective tissue sealing and reducing arcing between electrodes due to uneven current distribution and surface discontinuities, which can lead to tissue damage and unwanted electrical discharges during surgical procedures.
Innovation Solution
The electrode assembly features a conjoining edge formed at a predetermined angle, creating a linear transition zone to reduce arcing and maintain laminar tissue flow, with chamfered configurations and calculated easements to distribute current uniformly and avoid hot spots and surface discontinuities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the sealing area of the electrodes is increased to improve tissue sealing quality, then more tissue can be sealed, but more electrosurgical energy is required
Solution Approach 1:
The electrode incorporates a linear transition zone with a specific angle (e.g., 45 degrees) at the conjoining edge, creating a localized region with different geometric properties. This local geometric modification optimizes current distribution at the critical sealing interface, allowing effective sealing with reduced overall energy requirements by concentrating energy where it is most needed rather than distributing it uniformly across the entire electrode surface.
Solution Approach 2:
The invention changes the geometric parameter of the electrode edge by introducing a linear transition zone with a predetermined angle. This parameter change optimizes the electric field distribution and current density at the tissue interface, enabling more efficient energy transfer during tissue sealing. The angular parameter allows the electrode to achieve effective sealing with reduced energy input compared to traditional sharp-edged or rounded electrodes.
2Ease of manufacture
If conventional electrodes with sharp edges are used, then manufacturing is simpler, but arcing occurs between electrodes during activation
Solution Approach 1:
The invention replaces sharp edges with a linear transition zone that has a controlled angular geometry. While not fully rounded, this angled configuration eliminates the sharp corner discontinuities that concentrate electric fields and initiate arcing. The angled surface provides a gradual transition that distributes the electric field more evenly, preventing the field concentration that leads to electrical breakdown and arcing between opposing electrodes.
Solution Approach 2:
The invention addresses the harmful effect of electric field concentration at sharp edges by intentionally designing a controlled geometric transition. The linear transition zone with its predetermined angle converts the potential harm of edge effects into a beneficial distribution pattern, where the angled surface actively manages electric field lines to prevent arcing while maintaining manufacturing feasibility through standard machining operations.
3Device complexity
If conventional electrodes are used, then device complexity is lower, but current distribution is uneven causing hot spots and tissue damage
Solution Approach 1:
The linear transition zone with its angled geometry modifies the electrode surface to eliminate sharp discontinuities. This geometric modification creates a gradual transition that promotes uniform current distribution across the electrode-tissue interface. The angled surface guides current flow more evenly, preventing the concentration of current at sharp edges that creates hot spots and potential tissue damage, while adding only minimal complexity to the overall electrode design.
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 enhances tissue sealing quality by reducing arcing and tissue damage, ensuring consistent energy distribution and maintaining laminar flow, thereby improving the safety and effectiveness of electrosurgical procedures.
Implementation Method 1
The linear transition zone is dimensioned to simultaneously reduce arcing between the opposing jaw members during activation of the electrosurgical instrument
Implementation Method 2
reduce arcing between the opposing jaw members during activation of the electrosurgical instrument
Implementation Method 3
maintain laminar flow of the tissue during clamping
Implementation Method 4
ensure consistent energy distribution and maintaining laminar flow
Data Source
AI summary
An electrode assembly for use with an electrosurgical instrument includes a pair of opposing jaw members and an electrode positioned on each jaw member. One or both of the electrodes includes a tissue contacting surface that has an outer periphery and defines a side surface depending therefrom. The tissue contacting surface and the side surface include a conjoining edge formed at a first predetermined angle that defines a first linear transition zone dimensioned to reduce arcing between the opposing jaw members during activation of the electrosurgical instrument.