Endoscope Balloon with Adhering Portion for Stable Positioning
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Solution Overview
Problem
Conventional endoscope treatment tools with balloons face challenges in maintaining positioning during dilation treatments, as the balloon may slip or detach from the stenosed portion due to inflation, requiring frequent deflation and repositioning, complicating the procedure.
Innovation Solution
A treatment tool with a balloon that has a reduced diameter state with an adhering portion on its inner surface, which sticks to a shaft member at low pressure, preventing displacement until higher pressure causes it to peel off and inflate, allowing controlled dilation and re-sticking for repeated use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the balloon is inflated to dilate the stenosed portion, then the dilation effect is achieved, but the balloon may slip or detach from the stenosed portion
Solution Approach 1:
The adhering portion is applied to the shaft member before the balloon is inserted into the stenosed portion. This preliminary action ensures that when the balloon inflates, the adhering portion is already in position to prevent slippage, eliminating the need for post-insertion adjustments and reducing operational complexity
Solution Approach 2:
The adhering portion acts as an intermediary between the balloon and the shaft member. It transfers the inflation force more effectively to the stenosed portion while preventing the balloon from slipping, thus improving positioning stability without complicating the procedure
2Reliability
If the balloon is designed with a small diameter portion to prevent slippage, then positioning stability improves, but the balloon structure becomes more complex
Solution Approach 1:
The balloon is segmented into different functional portions: a central portion with the adhering portion for stability, and distal/proximal end portions for inflation. This segmentation allows each part to perform its specific function optimally while maintaining overall structural simplicity
Solution Approach 2:
The adhering portion is applied locally at the central portion of the balloon rather than throughout the entire structure. This localized application provides the necessary positioning stability without adding complexity to the overall balloon design, allowing the rest of the balloon to maintain a simple cylindrical structure
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 design ensures the balloon remains securely positioned during dilation, preventing displacement and facilitating uniform inflation, thus simplifying the procedure and maintaining effective treatment without the need for constant repositioning.
Implementation Method 1
an adhering portion provided on a side of an inner surface of a central portion of the balloon in a direction of the longitudinal axis, formed of an adhering material applied or adhered to the shaft member and configured to hold the central portion in a state in which the central portion is reduced in diameter
Implementation Method 2
the balloon is configured so that, when the fluid is injected and an internal pressure of the balloon is equal to or lower than a first internal pressure, and when the internal pressure of the balloon is higher than the first internal pressure, the central portion is peeled off from the adhering portion
Data Source
AI summary
A treatment tool for an endoscope of the present invention includes a sheath, a balloon provided at the sheath and configured to be expandable to an inflated state from a reduced diameter state by injecting a fluid, a shaft member inserted through an inside of the balloon and configured to extend along a longitudinal axis of the sheath from a distal end of the balloon to a proximal end thereof, and an adhering portion provided on a side of an inner surface of a central portion of the balloon in a direction of the longitudinal axis, formed of an adhering material applied or adhered to the shaft member and configured to hold the central portion in a state in which the central portion is reduced in diameter.