Endoscopic Dissection Instrument With Segmented Peak-Valley Tip
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Solution Overview
Problem
Conventional treatment instruments for endoscopic submucosal dissection face challenges such as difficulty in operation due to the risk of damaging muscularis propria and requiring skill and experience, especially in quickly and safely dissecting submucosa.
Innovation Solution
A treatment instrument for an endoscope with a design featuring peak and valley portions, where cutting means are only in the valley portions to prevent damage to muscularis propria and mucosa, and are connected to high-frequency current for precise cutting, allowing for safe and efficient submucosa dissection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional treatment instruments (hook knife, IT knife) are used for endoscopic submucosal dissection, then cutting function is provided, but the risk of damaging muscularis propria increases and operation difficulty increases
Solution Approach 1:
The treatment portion is segmented into multiple peak portions and valley portions, with cutting means selectively placed only in the valley portions. This segmentation allows the instrument to differentiate between submucosa (which enters valley portions) and muscularis propria/mucosa (which contact peak portions), enabling safe cutting while simplifying operation.
Solution Approach 2:
Different portions of the treatment portion have different functions: peak portions serve as protective non-cutting elements that contact muscularis propria and mucosa, while valley portions contain cutting means that only contact submucosa. This local differentiation of quality ensures safety by preventing damage to critical tissues while maintaining cutting capability where needed.
2Productivity
If conventional treatment instruments are used, then cutting function is provided, but the treatment time becomes long
Solution Approach 1:
Multiple valley portions with cutting means are distributed around the treatment portion, allowing simultaneous or sequential cutting of submucosa from multiple points. This increases dissection speed while the peak portions continuously protect against damage to muscularis propria and mucosa, maintaining safety throughout the accelerated process.
3Productivity
If cutting means are provided on the tip surface, then cutting efficiency increases, but the risk of damaging muscularis propria increases
Solution Approach 1:
Cutting means are placed only in the valley portions rather than uniformly on the tip surface. The peak portions remain as non-cutting protective elements. This local placement ensures that cutting efficiency is maintained for submucosa while the peak portions continuously protect against damage to muscularis propria and mucosa.
Solution Approach 2:
The peak portions act as intermediary protective elements between the cutting means in the valley portions and the critical tissues (muscularis propria and mucosa). They physically intervene to prevent direct contact between cutting means and protected tissues, eliminating the harmful effect while preserving cutting efficiency.
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 quick and safe dissection of submucosa by preventing contact with muscularis propria and mucosa, reducing the risk of damage and improving operational ease and accuracy.
Implementation Method 1
the cutting electrodes are connected to high-frequency current supply means. The submucosa can be cut by applying a high frequency current the electrodes, and similarly to a case of an electrocautery device or the like, cutting can be performed without strongly affecting each tissue of the human body.
Data Source
Figure 1
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Figure 5A~5F
AI summary
A treatment instrument for an endoscope is provided that is suitable for cutting submucosa in endoscopic submucosal dissection. The treatment instrument for an endoscope includes a treatment portion having cutting means at a tip of an insertion portion that is to be inserted into the body. The main unit of the treatment portion is formed in a toothed-wheel shape which alternately has a peak portion and a valley portion where the cutting means is provided in the valley portions.