Thermal Cutting Assembly With Conductive Bridge for Sealing and Cutting
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Solution Overview
Problem
Existing electrosurgical forceps require separate mechanical and energy-based cutting mechanisms, which can be cumbersome and inefficient for precise tissue sealing and cutting.
Innovation Solution
A thermal cutting assembly is integrated into the jaw members of surgical instruments, utilizing resistive elements connected to an energy source through a dielectric insulator and conductive bridge, allowing for rapid and efficient tissue cutting by thermal energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate mechanical and energy-based cutting mechanisms are used, then tissue sealing and cutting functions are provided, but device complexity increases and operation becomes cumbersome
Solution Approach 1:
The patent combines sealing and cutting functions into a single integrated thermal cutting assembly. The resistive heating element is positioned within the jaw member such that it performs both sealing (when tissue is clamped) and cutting (when energy is applied) functions, eliminating the need for separate mechanical knife mechanisms and reducing overall device complexity
Solution Approach 2:
The thermal cutting assembly serves multiple functions: it seals tissue through controlled thermal energy application and cuts tissue through the same energy-based mechanism. The resistive element acts as a universal tool that adapts its function based on the operational mode, providing both coagulation/sealing and cutting capabilities through a single component
2Manufacturing precision
If thermal cutting element is used, then cutting precision is improved, but energy consumption increases
Solution Approach 1:
The resistive heating element is designed to concentrate thermal energy precisely at the cutting edge where it contacts the tissue. The dielectric insulator ensures that energy is delivered only to the intended location, minimizing unnecessary energy consumption while maintaining high cutting precision at the focal point
Solution Approach 2:
The patent replaces traditional mechanical cutting mechanisms with an energy-based thermal cutting system. This substitution provides more precise cutting control through energy modulation while the localized application of heat reduces overall energy consumption compared to continuous mechanical cutting actions
3Reliability
If dielectric insulator is used to isolate resistive elements, then electrical safety is improved, but thermal conduction efficiency decreases
Solution Approach 1:
The dielectric insulator serves as an intermediary material that provides electrical isolation between the resistive elements and surrounding structures. It is positioned strategically to block electrical current paths while allowing thermal energy to reach the tissue through controlled conduction at the cutting interface
Solution Approach 2:
The dielectric insulator is applied selectively in specific regions where electrical isolation is needed, rather than completely enclosing the resistive element. This localized application maintains electrical safety while preserving thermal conduction efficiency at the critical cutting interface where tissue contact occurs
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 thermal cutting assembly enables seamless integration of sealing and cutting processes, reducing complexity and enhancing precision by using resistive elements that quickly heat up and cut tissue with minimal energy consumption.
Implementation Method 1
A first resistive element adapted to connect to an energy source and disposed in thermal communication with the substrate... configured to extend along the dielectric insulator on the first side of the substrate to a distal end portion
Implementation Method 2
A dielectric insulator is disposed along first and second sides of the substrate and extends partially or fully therealong from the proximal end to the distal end thereof
Implementation Method 3
The substrate forms a conductive bridge between the distal ends of the first and second resistive elements
Data Source
AI summary
A thermal cutting assembly for a jaw member includes a substrate having a cutting edge disposed along an upper surface thereof. An insulator is disposed along the sides of the substrate and extends therealong. A first and second resistive elements connect to an energy source and are disposed in thermal communication on either side of the substrate atop the insulator. The distal end of each resistive element is exposed from the insulator and electrically connects to the substrate. The substrate forms a conductive bridge between the distal ends of the first and second resistive elements.