Hemostatic Clip Core Member Frangible Link Deployment
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Solution Overview
Problem
Current two-piece hemostatic clip deployment requires a two-stage process, which is inefficient and may not allow for proper orientation and repeated opening/closing of the clip, limiting its effectiveness in endoscopic procedures for hemostasis.
Innovation Solution
A multifunctional core member with a frangible link that allows for single-stage deployment, enabling the clip to be properly oriented and repeatedly opened/closed, using a capsule and control wire mechanism to secure and deploy the clip in a single stage process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a two-piece hemostatic clip uses a traditional two-stage deployment process, then the clip can be deployed, but the deployment is inefficient and does not allow for proper orientation and repeated opening/closing
Solution Approach 1:
The core member is divided into first and second portions connected by a frangible link, allowing the distal portion to remain in the capsule while the proximal portion is retrieved. This segmentation enables single-stage deployment while maintaining the ability to open and close the clip multiple times for proper tissue engagement.
Solution Approach 2:
The frangible link provides a dynamic connection that can fracture under predetermined load, transitioning the clip from a closed deployed state to an open state for tissue engagement. This dynamic mechanism enables repeated opening/closing cycles while maintaining deployment efficiency.
2Device complexity
If the frangible link is designed to fracture under predetermined load, then the clip can be deployed in a single stage, but the link must be strong enough to maintain structural integrity during handling
Solution Approach 1:
The frangible link is designed with specific material properties and geometric parameters that allow it to fracture at a predetermined load threshold. The link's strength parameters are optimized to maintain structural integrity during handling and deployment, while fracturing at the required threshold to enable single-stage deployment.
3Ease of operation
If the core member includes protrusions for engaging cut-outs in the arm, then the clip achieves proper orientation, but the structure becomes more complex
Solution Approach 1:
Protrusions are added locally to the core member at specific positions to engage with cut-outs in the arm, providing proper orientation functionality. This localized feature addition achieves the desired orientation capability without requiring complete redesign of the entire core member structure.
Data Source
AI summary
A device includes a clip including first and second arms distal ends of which are biased apart and a core member including first and second portions connected to one another via a frangible link. The first portion includes a first protrusion for engaging a cut-out in the first arm. The frangible link is fractured when subjected to a load of at least a predetermined level deploying the clip. The device also includes a capsule slidably housing the core member and a proximal portion of the clip.