Anastomosis Clamp Fetching Cap for Safe Tissue Release
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Solution Overview
Problem
Existing anastomosis clamps are difficult to release from tissue, requiring high operational proficiency and can cause tissue damage, and their use often results in a bulky transparent cap that discomforts patients.
Innovation Solution
A fetching assembly for anastomosis clamps, comprising a fetching cap, fetching hook, and anastomosis clamp, allows for easy release by sleeving the clamp onto the cap, using fetching threads and a handle to avoid tissue damage, and a releasing assembly with a transparent cap and push rod to reduce cap size and improve comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the anastomosis clamp is firmly assembled on the transparent cap to prevent it from getting off, then the clamp remains secure during delivery, but it causes difficulties and failures when releasing the clamp
Solution Approach 1:
The spinous part of the clamp is designed to dynamically change its clamping state. During delivery, it maintains a firm clamped state for secure assembly on the cap. During release, it can transition to an opened state to facilitate easy removal from tissue, resolving the contradiction between secure assembly and easy release
Solution Approach 2:
The fetching assembly acts as an intermediary tool to mediate the release process. It includes a fetching cap that fits over the clamp and a fetching hook that engages with the clamp's fetching thread, providing a mechanical advantage to open the spinous part and release the clamp from tissue without direct manual manipulation
2Reliability
If the spinous part of the anastomosis clamp pierces into the tissue to achieve firm clamping, then the clamping is secure, but the clamp becomes difficult to release and may cause tissue damage
Solution Approach 1:
The spinous part is designed with dynamic capability to transition between clamped and opened states. When firmly clamped, it pierces into tissue for secure fixation. During release using the fetching assembly, it can be opened to minimize tissue damage, resolving the contradiction between firm clamping and tissue safety
Solution Approach 2:
The clamp incorporates a fetching thread that enables it to be self-retrievable. The fetching hook engages with this thread to pull the clamp out of tissue, allowing the clamp to serve its own removal function and reducing the risk of tissue damage that would occur with forced extraction
3Ease of manufacture
If the anastomosis clamp is disposed in a transparent cap with a push rod, then the clamp is protected and ready for delivery, but the cap size becomes overlarge causing patient discomfort
Solution Approach 1:
The push rod is extracted from inside the transparent cap and repositioned to the outer side of the cap. This extraction reduces the internal volume requirement of the cap, allowing for a more compact overall size that is more comfortable for patient delivery while still maintaining the push rod's functionality for clamp deployment
Data Source
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AI summary
The present disclosure provides a fetching assembly for an anastomosis clamp. The fetching assembly includes a fetching cap, a fetching hook and an anastomosis clamp. The fetching cap is configured to be mounted on a front end of an endoscope and has an outer diameter smaller than an inner diameter of the anastomosis clamp. The fetching hook is configured to pass through the fetching cap and hook onto the anastomosis clamp. When the fetching hook is pulled backward, the anastomosis clamp can be sleeved on an outer peripheral surface of the fetching cap to restore the closed anastomosis clamp. In the present disclosure, when the anastomosis clamp is pulled out by the fetching hook, the fetching cap can open the anastomosis clamp to allow the spinous part at the front end of the anastomosis clamp to release the tissue, avoiding damages to the tissue when fetching the anastomosis clamp out, greatly lowering the requirement on operational proficiency of an operator, and enabling multiple clamping operations until an optimal clamping position is found.