Asymmetrical Endoscopic Clip Arms for Tissue Puncture and Closure
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Solution Overview
Problem
Existing clip units for endoscopic treatments face challenges in efficiently ligating excised portions and stopping bleeding due to limitations in puncturing and grasping tissue, particularly in large or complex treatment areas.
Innovation Solution
A clip unit with asymmetrical arms featuring a first anchor positioned on the opening side of the claw, allowing for easy puncture and grasp of mucous membranes, combined with a tubular member for secure closure, facilitates efficient ligation and closure of tissue defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the clip arms are designed with symmetrical structure, then the manufacturing is simple, but the puncturing and grasping efficiency of tissue is insufficient
Solution Approach 1:
The clip unit employs asymmetrical arm structures where the first arm includes a first claw and a first anchor positioned at different locations, while the second arm includes a second claw and a second anchor. This asymmetrical design enables differentiated functions: one arm primarily punctures tissue while the other primarily grasps it, thereby improving overall puncturing and grasping efficiency without significantly complicating manufacturing processes.
2Device complexity
If the anchor and claw are positioned close together, then the structure is compact, but the puncture and grasp functions are not sufficiently differentiated
Solution Approach 1:
The clip unit implements local quality differentiation by positioning the first anchor and first claw at distinct locations on the first arm, and the second anchor and second claw at distinct locations on the second arm. This spatial separation creates localized functional zones: one region optimized for puncturing and another for grasping, allowing the structure to remain relatively compact while achieving clear functional differentiation between puncture and grasp operations.
Data Source
AI summary
A clip unit includes a clip having a first arm and a second arm that are configured to be opened and closed in an opening and closing direction. The first arm has a first arm main body extending in a longitudinal direction. A first claw is provided at a distal end of the first arm main body and extends toward a closing side in the opening and closing direction. A first anchor is provided at the distal end of the first arm main body or the first claw and extends toward the closing side. At least a distal end of the first anchor is disposed on an opening side in the opening and closing direction with respect to the first claw. A gap is formed between the first claw and the first anchor in a width direction perpendicular to the longitudinal direction and the opening and closing direction.