Endoscopic Clip Arm Teeth for Secure Hold-and-Drag Tissue Closure
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Solution Overview
Problem
Existing endoscopic clipping devices face challenges in securely closing large defects due to the risk of tissue slipping out when clips are reopened, requiring multiple attempts and advanced techniques that are technically challenging.
Innovation Solution
A device with clip arms featuring aggressive gripping features such as spikes, hooks, and barbs, designed to securely attach to target tissue during the 'hold and drag' technique, ensuring retention even when the clip is reopened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional clips are used for the 'hold and drag' technique, then the procedure can be simplified and large defects can be closed, but the risk of tissue slipping out increases when clips are reopened
Solution Approach 1:
The clip arms are equipped with tissue retention features (teeth, barbs, or hooks) at specific locations to provide aggressive gripping capability. This local enhancement of gripping quality allows the clip to securely hold tissue during the hold and drag technique while maintaining overall clip functionality.
Solution Approach 2:
The tissue retention features are designed to engage with tissue before the clip is fully deployed or reopened. This preliminary engagement ensures that tissue is securely captured and less likely to slip out when the clip is reopened during the hold and drag technique.
2Reliability
If multiple attempts are made to close defects successfully, then tissue retention reliability improves, but procedural time increases
Solution Approach 1:
The tissue retention features provide enhanced gripping capability at critical locations on the clip arms, ensuring secure tissue capture on the first attempt. This reduces the need for multiple attempts and thereby decreases procedural time.
Solution Approach 2:
The design of tissue retention features with varying geometries (teeth, barbs, hooks) and orientations changes the mechanical interaction parameters between the clip and tissue. This optimization ensures reliable tissue capture with a single attempt, eliminating time loss from repeated procedures.
3Reliability
If advanced closure techniques with additional devices are used, then large defects can be closed reliably, but device complexity increases
Solution Approach 1:
The tissue retention features are integrated directly into the clip arms, combining the gripping function with the existing clip structure. This eliminates the need for separate gripping devices or complex multi-device techniques, achieving reliable large defect closure with a single device.
Solution Approach 2:
The clip with tissue retention features serves multiple functions: it provides standard clipping capability and simultaneously offers enhanced tissue gripping for the hold and drag technique. This multi-functionality replaces the need for specialized additional devices, simplifying the overall system while maintaining reliability.
Data Source
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AI summary
A device for treating tissue comprises a capsule extending longitudinally from a proximal end to a distal end and includes a channel extending therethrough along a longitudinal axis, and first and second clip arms. The first clip arm includes a first tissue retention feature and the second clip arm includes a second tissue retention feature. The first tooth of the first clip arm is positioned adjacent to a first lateral edge of the first clip arm while the second tooth of the first clip arm is positioned more centrally and separated from the first tooth of the first clip arm by a first gap having a width substantially corresponding to a width of a second sharpened tip of the second tooth of the second clip arm.