Endoscopic Clip Release Link for Controlled Ligation
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Solution Overview
Problem
Conventional medical devices using endoscopes for tissue ligation face issues with the breaking mechanism failing under excessive tensile force, leading to unreliable clip application and indwelling.
Innovation Solution
A medical device with a clip unit, operation wire, and link mechanism that allows the link to contact the sheath's inner surface, releasing engagement between the clip unit and operation wire, ensuring controlled clip deployment and retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a breaking mechanism is used to release the clip unit, then the clip unit can be indwelled in the body, but the breaking mechanism fails under excessive tensile force leading to unreliable operation
Solution Approach 1:
The patent removes the breaking mechanism from the system and replaces it with a friction-based release mechanism. The link is designed to frictionally engage with the sheath during delivery, then frictionally disengage to release the clip unit, eliminating the weak breaking mechanism that failed under tensile force.
Solution Approach 2:
The sheath serves as an intermediary component that enables controlled release of the clip unit. Through frictional engagement and disengagement between the link and sheath, the system achieves reliable clip deployment and subsequent release without requiring a breaking mechanism.
2Ease of operation
If the link is designed to be inserted into the sheath, then controlled release is achieved, but the device structure becomes more complex
Solution Approach 1:
The patent combines multiple functions into the link-sheath frictional interaction: the link is inserted into the sheath for delivery, frictional engagement provides controlled release, and the same frictional interface enables retrieval. This merging of functions achieves controlled operation without adding separate complex mechanisms.
Data Source
AI summary
A medical device that includes a clip unit; an operation wire for operating the clip unit; a link capable of linking the clip unit and the operation wire such that the clip unit is engaged with the operation wire; and a sheath. The link can be moved to release an engagement between the operation wire and the clip unit.