Featured Clip Arms With Tissue Retention for Large Defect 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 using the 'hold and drag' technique, requiring multiple attempts for successful closure.
Innovation Solution
A clip system with aggressive gripping features such as spikes, hooks, and barbs on the clip arms that pierce and retain target tissue, allowing secure closure of large defects with a single clip application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional clips are used to close tissue defects, then the clip structure remains simple, but the opening width is limited and tissue slipping risk increases
Solution Approach 1:
The clip arms incorporate localized retention features (spikes, hooks, barbs) at specific positions along the arm length. These features are concentrated at the distal portions where tissue engagement is most critical, allowing secure grip on tissue edges without requiring the entire clip structure to be complex. The retention features are strategically placed to engage tissue at multiple points along the clip arm, preventing slipping while maintaining overall clip simplicity.
Solution Approach 2:
Instead of making the entire clip structure more complex to increase holding capacity, the invention inverts the approach by keeping the basic clip structure simple and adding specialized retention features only where needed. The retention features (spikes, hooks, barbs) are designed to be inserted into or engage with tissue, creating a mechanical interlock that prevents tissue from slipping out, rather than relying on a complex overall clip design.
2Reliability
If multiple attempts are made to close defects successfully, then tissue retention improves, but procedural time increases
Solution Approach 1:
The retention features (spikes, hooks, barbs) are pre-configured on the clip arms in a ready-to-engage position. When the clip is applied to tissue, the features are already positioned to immediately engage and secure tissue edges upon closure, eliminating the need for multiple adjustment attempts. The preliminary positioning of retention features allows for single-attempt successful closure in most cases, significantly reducing procedural time while maintaining high reliability.
3Adaptability or versatility
If additional devices like snares or 8 rings are used, then closure of large defects becomes possible, but device complexity increases
Solution Approach 1:
The clip arms are designed with multi-functional retention features that can handle various tissue types and defect sizes. The spikes, hooks, and barbs serve multiple functions: they engage tissue edges, prevent slipping, and provide secure closure. This universal design allows a single clip device to perform what previously required multiple specialized devices (conventional clips, snares, 8 rings), thereby reducing overall device complexity while maintaining the ability to close large defects effectively.
Data Source
AI summary
A system for treating tissue includes a capsule including a channel extending therethrough; first and second clip arms each extending from a proximal end to a distal end, the proximal ends being received within the channel of a capsule to be moved between an open tissue receiving configuration; and a closed tissue clipping configuration. The first clip arm includes a first tissue retention feature at a distal portion thereof configured to pierce through a target tissue when in the tissue clipping configuration and subsequently release the target tissue when the clip arms are moved to an at least partially open configuration. The second clip arm includes a second tissue retention feature at a distal portion thereof configured to pierce and retain the target tissue thereon when in both the closed tissue clipping configuration and the open tissue receiving configuration.