Electrosurgical Jaw Assembly with Isolated Dissector Electrode
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Solution Overview
Problem
There is a continuing need for jaw assembly components that can be easily integrated into manufacturing processes for electrosurgical instruments, such as forceps, to enhance tissue dissection and coagulation capabilities while minimizing the risk of short circuits and ensuring proper alignment and thermal resistance.
Innovation Solution
The design includes opposing jaw assemblies with electrically-conductive tissue-engaging structures and laterally positioned dissector electrodes that are electrically isolated from the conductive structures, allowing for individual activation and providing a current return path, which facilitates effective tissue grasping and energy application during electrosurgical procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dissector electrodes are integrated into jaw assembly, then tissue dissection and coagulation capabilities are enhanced, but device complexity increases
Solution Approach 1:
The patent combines multiple functions (tissue grasping, dissection, and coagulation) into a single integrated jaw assembly. The dissector electrode is incorporated directly into the jaw assembly structure, allowing the instrument to perform multiple tissue treatment functions without requiring separate devices, thereby enhancing versatility while managing complexity through integration.
Solution Approach 2:
The jaw assembly is designed with multi-functionality, serving both as a mechanical grasping tool and as an electrosurgical instrument for dissection and coagulation. The dissector electrode enables the same jaw assembly to perform multiple electrosurgical functions (dissection and coagulation) in addition to mechanical tissue manipulation, reducing the need for multiple specialized instruments.
2Reliability
If dissector electrodes are electrically isolated from conductive structures, then short circuit risk is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces an electrically insulating material as an intermediary between the dissector electrode and the electrically conductive jaw assembly structures. This insulating material acts as a mediator that prevents electrical contact and potential short circuits while allowing the electrode to be positioned and secured within the jaw assembly. The insulating material bridges the gap between electrical isolation requirements and mechanical integration needs.
3Reliability
If dissector electrodes are laterally positioned, then current return path is improved, but alignment precision requirements increase
Solution Approach 1:
The patent incorporates alignment features and positioning structures during the manufacturing process that pre-establish the correct lateral position of the dissector electrode relative to the jaw assembly. These preliminary positioning features ensure proper alignment and current return path configuration before the device is assembled and used, reducing the need for post-manufacturing adjustment and ensuring consistent electrical performance.
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 configuration enhances the reliability and effectiveness of electrosurgical instruments by ensuring precise energy delivery and mechanical action, improving tissue sealing, coagulation, and dissection while reducing the risk of short circuits and facilitating assembly.
Implementation Method 1
The basic purpose of both monopolar and bipolar electrosurgery is to produce heat to achieve the desired tissue/clinical effect
Implementation Method 2
Bipolar electrosurgical current travels from one electrode, through the intervening tissue to the other electrode to complete the electrical circuit
Data Source
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AI summary
An end-effector assembly, comprising: opposing first and second jaw assemblies, at least one of the first and second jaw assemblies movable relative to the other from a first position wherein the jaw assemblies are disposed in spaced relation relative to one another to at least a second position wherein the jaw assemblies are closer to one another; the first jaw assembly including: a first housing; and a first electrically-conductive tissue-engaging structure associated with at least a portion of the first housing; the second jaw assembly including a second housing, at least one of the first or second housings of the first and second jaw assemblies having an electrically-conductive outer surface configured to be coupled to an electrosurgical power generating source; and a dissector electrode coupled along at least a portion of a lateral side of either one of the first housing or the second housing, wherein the dissector electrode is electrically-isolated from the first electrically-conductive tissue-engaging structure and the electrically-conductive outer surface of the at least one first or second housings.