Thermal Cutting Element for Electrosurgical Instruments
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Solution Overview
Problem
Existing electrosurgical forceps require a mechanical knife to cut treated tissue, which can be cumbersome and may not accurately sever tissue, whereas energy-based cutting methods are not effectively integrated into these instruments.
Innovation Solution
An end effector for electrosurgical instruments featuring a thermal cutting element with a scallop and heating element, independently activatable and connected to an electrosurgical energy source, which includes beveled edges and chamfered edges to facilitate tissue cutting and sloughing, and sensors to monitor parameters like power or temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanical knife is used to cut treated tissue, then tissue can be severed, but the instrument becomes cumbersome and cutting precision is compromised
Solution Approach 1:
The patent replaces the mechanical knife system with a thermal cutting element that uses electrosurgical energy to cut tissue. The thermal cutting element is independently activatable and connected to an electrosurgical energy source, eliminating the need for a mechanical knife advancement mechanism while providing effective tissue severing through thermal energy.
Solution Approach 2:
The electrosurgical forceps are designed to perform multiple functions: tissue grasping through jaw members, tissue treatment through electrically conductive surfaces, and tissue cutting through the thermal cutting element. This multi-functionality eliminates the need for separate mechanical knife mechanisms, reducing instrument complexity while maintaining cutting capability.
2Manufacturing precision
If a mechanical knife is used to cut treated tissue, then tissue can be severed, but cutting accuracy is compromised
Solution Approach 1:
The thermal cutting element provides precise cutting through controlled thermal energy application. The element can be independently activated and positioned within the jaw members, allowing accurate cutting at the treated tissue site without the mechanical complexity and positioning errors associated with advancing a physical knife blade.
3Productivity
If energy-based cutting methods are integrated into electrosurgical forceps, then cutting efficiency is improved, but device complexity increases
Solution Approach 1:
The electrosurgical forceps integrate multiple functions including tissue grasping, treatment, and cutting using the same basic instrument structure. The thermal cutting element and electrically conductive surfaces share the same electrosurgical energy source connection, eliminating the need for separate mechanical cutting mechanisms and reducing overall device complexity despite adding energy-based cutting capability.
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
Enables precise and efficient thermal cutting of tissue using energy-based methods, reducing the need for mechanical knives and improving tissue handling and separation with reduced trauma.
Implementation Method 1
A thermal cutting element is disposed in one or both of the electrically conductive tissue engaging surfaces, is independently activatable relative to the electrically conductive tissue engaging surfaces and is adapted to connect to the electrosurgical energy source
Implementation Method 2
The thermal cutting element includes a scallop defined therein proximal to the exposed distal end thereof, the scallop is configured to facilitate scoring of tissue upon movement of the thermal cutting element relative to the tissue
Implementation Method 3
the thermal cutting element includes a cutting spine disposed along a length thereof having a pair of opposing beveled edges extending away therefrom that are configured to slough tissue away from the cutting spine once the tissue is cut
Data Source
AI summary
An end effector assembly for an electrosurgical instrument includes a pair of opposing jaw members each having a jaw housing supporting an electrically conductive tissue engaging surface thereon. The electrically conductive tissue engaging surfaces are disposed in opposition relative to one another. The jaw members are movable relative to one another to grasp tissue therebetween and are connect to an electrosurgical energy source. A thermal cutting element is disposed in one of the electrically conductive tissue engaging surfaces and is independently activatable relative to the electrically conductive tissue engaging surfaces. The thermal cutting element is exposed along the length of the electrically conductive tissue engaging surface and includes an exposed distal end extending through a distal end of the jaw housing. The thermal cutting element includes a scallop defined proximal to the exposed distal end thereof configured to facilitate tissue scoring upon movement and activation thereof.