Endoscopic Knife Rod Plugging Tissue Adhesion
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Solution Overview
Problem
Endoscopic treatment tools with high-frequency knives face issues of tissue adhesion and clogging due to burnt deposits, which disrupt fluid supply and high-frequency energy application during procedures like incision, cauterization, and hemostasis.
Innovation Solution
An endoscopic treatment tool design featuring a sheath with an insulated distal end and a rod that can move within the sheath's conduit, allowing for the knife's retraction and preventing tissue adhesion, while maintaining fluid supply stability through a separate water conduit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-frequency knife is applied to treatment site for incision, cauterization, or peeling, then treatment effectiveness is improved, but tissue adhesion and clogging occur causing water supply instability
Solution Approach 1:
The patent extracts the harmful function of the distal end opening by providing a rod that plugs it during high-frequency treatment. This prevents tissues from entering the water supply conduit through the distal end opening, eliminating the clogging problem while maintaining water supply stability during local injection treatment.
Solution Approach 2:
The rod is designed to be movable between plugged and unplugged positions relative to the distal end opening. This dynamic configuration allows the system to adapt to different treatment modes: plugged during high-frequency treatment to prevent tissue adhesion, and unplugged during local injection to allow water supply.
2Object-generated harmful factors
If rod is provided to plug distal end opening and prevent tissue adhesion, then tissue adhesion is reduced, but device complexity increases
Solution Approach 1:
The rod is integrated within the existing water supply conduit structure, merging the tissue prevention function with the water supply system. The rod utilizes the internal space of the water supply conduit without requiring separate external components, thereby minimizing structural complexity while effectively preventing tissue adhesion.
3Object-generated harmful factors
If rod is positioned to plug distal end opening, then water supply is blocked, but if unplugged then tissue adhesion occurs
Solution Approach 1:
The rod's position is dynamically adjusted based on treatment requirements. During high-frequency treatment, the rod is positioned to plug the distal end opening to prevent tissue adhesion. During local injection treatment, the rod is retracted to allow water supply. This dynamic positioning resolves the contradiction between preventing tissue adhesion and maintaining water supply.
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 tool effectively prevents tissue adhesion to the knife, ensures stable fluid supply, and allows for efficient performance of treatments by physically removing burnt deposits, reducing the need for high-pressure water cleaning.
Implementation Method 1
a distal end member having insulation and the distal end member provided at a distal end of the sheath
Data Source
AI summary
An endoscopic treatment may include a sheath extending in a longitudinal direction, a distal end member having insulation and the distal end member provided at a distal end of the sheath and having a through-hole penetrating in the longitudinal direction. The treatment tool may further include an electrode having a first conduit extending in the longitudinal direction and the electrode being configured to advance and retract into the through-hole. The electrode including a rod extending in the longitudinal direction and configured to be arranged in at least a part of the first conduit.