Endoscope Cap-and-Hook Assembly for Anastomosis Clamp 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 transparent caps are oversized, causing patient discomfort.
Innovation Solution
A fetching assembly with a fetching cap and hook, and a releasing assembly with a transparent loading cap and push rod, both designed for use with an endoscope, facilitate easy release and reduce cap size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the anastomosis clamp is firmly assembled on the transparent cap to prevent it from getting off, then the clamp stability is improved, but the release operation becomes difficult and may fail
Solution Approach 1:
The transparent cap is divided into two functional parts: a fetching assembly (cap body + hook) for stable clamping, and a releasing assembly (cap body + push rod) for easy release. This segmentation allows the same base structure to serve both stable assembly and easy release purposes through different operational mechanisms.
Solution Approach 2:
The fetching hook acts as an intermediary tool that connects to the clamp's fetching thread, enabling the operator to easily retrieve the clamp without directly manipulating the firmly assembled clamp-cup interface. The hook mediates between the operator's hand and the securely attached clamp.
2Stability of the object's composition
If the transparent cap size is increased to accommodate the anastomosis clamp, then the clamp assembly stability is improved, but patient comfort deteriorates due to oversized cap
Solution Approach 1:
The anastomosis clamp is nested within the transparent cap, and the fetching/releasing assemblies are nested within the cap structure. This nested arrangement allows compact integration of multiple components, maintaining stability while minimizing the overall external dimensions that contact the patient.
Solution Approach 2:
The design moves the operational interface (fetching hook and push rod) to a different spatial dimension - outside the cap body - while keeping the clamp-cup assembly compact. This allows the cap to remain small for patient comfort while providing adequate operational space through the protruding assemblies.
3Strength
If the anastomosis clamp is designed to firmly clamp the tissue, then the clamping effectiveness is improved, but the release becomes difficult and may cause tissue damage
Solution Approach 1:
The clamp incorporates a fetching thread that automatically becomes accessible when the clamp is attached to the cap. The self-opening mechanism at the clamp front end automatically opens when the clamp is pulled, providing self-service release without requiring complex manual manipulation that could damage tissue.
Solution Approach 2:
The fetching thread is pre-positioned and the self-opening mechanism is pre-configured on the clamp. When the fetching hook engages the thread and pulls, the pre-designed mechanical response (thread unwinding and front end opening) automatically occurs, making release easy and safe without requiring precise real-time manipulation.
Data Source
AI summary
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.