Endoscopic Closure Device With Retention Teeth
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Solution Overview
Problem
Current endoscopic clips are inadequate for reliably closing larger mucosal defects in the gastrointestinal tract, as they often require multiple clips and cannot maintain tissue traction when opened, leading to incomplete closure and potential complications.
Innovation Solution
A defect closure clip with a unique design featuring one moving arm, differently sized jaws, and a tooth configuration that allows grasping and holding tissue under tension, even when the clip is opened, enabling effective closure of larger defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional endoscopic clips are used to close mucosal defects, then the procedure is simple and quick, but the clips cannot reliably hold tissue under tension and often fail to close larger defects
Solution Approach 1:
The clip is divided into two separate functional components: a deployable clip mechanism for initial tissue capture and a retention mechanism with teeth that engages the tissue. This segmentation allows each component to be optimized for its specific function - the clip for initial capture and the teeth for sustained retention under tension.
Solution Approach 2:
The retention teeth are pre-positioned on the stationary arm in a ready state before deployment. When the clip is deployed, the teeth are already in position to immediately engage the tissue and prevent release, eliminating the need for secondary actions to secure the tissue.
2Area of stationary object
If multiple clips are used to close larger defects, then more tissue can be covered, but the procedure time increases and tissue trauma is amplified
Solution Approach 1:
The single clip device performs multiple functions: initial tissue capture, sustained retention under tension, and defect closure. The combination of the deployable clip and retention teeth allows one device to accomplish what previously required multiple clips, reducing procedure time and tissue trauma.
3Ease of operation
If conventional clips are designed with two moving arms, then the clip can close on tissue, but the tissue is released when the clip opens
Solution Approach 1:
The clip mechanism is designed asymmetrically with one stationary arm containing retention teeth and one deployable arm. This asymmetry ensures that when the deployable arm opens, the stationary arm with teeth maintains continuous engagement with the tissue, preventing release.
4Reliability
If endoscopic suturing tools are used for defect closure, then reliable closure can be achieved, but the tools are bulky and difficult to use in many locations
Solution Approach 1:
The clip device replicates the tissue-holding function of sutures through its toothed retention mechanism, achieving similar reliability without the bulk and complexity of suturing tools. The clip can be delivered through standard endoscopic channels, providing suture-like closure capability with endoscopic simplicity.
Data Source
AI summary
A closure device with a fixed upper jaw and a pivoting lower jaw, and a hook like tooth extending from the upper jaw such that the upper jaw may be used to engage distal mucosa tissue and pull the tissue over a mucosal defect while engaging proximal tissue with the lower jaw. This configuration allowing the closure of mucosal defects that are wider than the jaw span of the closure device.