Electrosurgical Blade Edge Insulation via Ceramic Substrate
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Solution Overview
Problem
Monopolar electrosurgical devices relying on expensive glass-coating processes for minimally exposed conductive edges face inefficiencies and high material costs, limiting precision and thermal control during tissue dissection.
Innovation Solution
A cutting element with a non-conductive body, such as Zirconium toughened Alumina, featuring a conductive element etched or printed along a chamfered edge, eliminating the need for glass-coating by using silver or gold alloys and ensuring focused energy delivery with reduced collateral tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If glass-coating process is used to create minimally exposed conductive edge, then precision cutting with minimal thermal injury is achieved, but manufacturing cost and complexity increase significantly
Solution Approach 1:
The patent removes the glass-coating layer entirely, extracting only the essential function of thermal insulation. The non-conductive body provides insulation without requiring the complex glass-coating process, while the conductive element is precisely positioned along the cutting edge through alternative manufacturing methods such as screen printing or sintering of conductive paste.
Solution Approach 2:
The conductive element is applied locally only where needed for cutting (along the cutting edge) rather than coating the entire blade. This localized application is achieved through screen printing, aerosol deposition, or sintering techniques that deposit conductive material selectively on the non-conductive body, providing precise thermal control without global coating complexity.
2Use of energy by moving object
If glass-coating process is used to create minimally exposed conductive edge, then focused energy delivery is achieved, but material cost increases
Solution Approach 1:
The patent replaces expensive, complex glass-coating materials with simpler, more economical conductive paste or ink formulations. These alternative materials can be applied in thin layers through printing or deposition processes, achieving the same focused energy delivery function at lower material cost. The conductive element maintains sufficient conductivity for RF energy delivery without requiring the costly glass-based insulator materials.
3Manufacturing precision
If minimally exposed conductive edge (1-100 microns) is created through glass-coating, then precision cutting is achieved, but manufacturing efficiency decreases
Solution Approach 1:
The patent replaces the mechanical glass-coating process with deposition or printing techniques such as screen printing, aerosol deposition, or sintering. These methods allow for precise control of conductive element dimensions through material formulation and deposition parameters rather than mechanical coating processes, improving manufacturing efficiency while maintaining the 1-100 micron precision required for focused energy delivery.
4Temperature
If glass-coating is used to insulate the cutting tip, then thermal control is improved, but reliance on custom materials increases
Solution Approach 1:
The non-conductive body serves multiple functions: it provides thermal insulation, supports the conductive element, and can be manufactured from standard ceramic or polymer materials. The conductive element can be made from various materials including silver paste, aluminum paste, or other conductive inks, allowing flexibility in material selection based on performance requirements and cost considerations, rather than being restricted to custom glass-coating formulations.
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 solution provides precise tissue cutting with minimal thermal injury and reduced collateral damage, improving manufacturing efficiency and reducing material costs by eliminating the need for expensive glass-coating processes.
Implementation Method 1
the conductive element being configured to cut tissue with monopolar radiofrequency energy
Implementation Method 2
the remainder of the tip is insulated and kept at a relatively low temperature
Data Source
AI summary
A cutting element for an electrosurgical device. The cutting element includes an elongate non-conductive body having a first face opposite a second face, the first face and the second face defining an edge there between. A conductive element is disposed only along the edge, the conductive element being configured to cut tissue with monopolar radiofrequency energy.