Tissue Anchor Crossbar Suture Tensioning
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Solution Overview
Problem
Existing tissue anchors face challenges in ensuring proper tensioning and complete closure of perforations, especially in the gastrointestinal tract, where bacterial contamination is a concern, due to difficulties in managing individual sutures connected to multiple anchors.
Innovation Solution
A tissue anchor design featuring a crossbar and strand configuration with a loop that allows for adjustable suture tensioning, reducing friction and preventing abrasion, along with optional resorbable materials and flange designs for enhanced versatility and biocompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple tissue anchors are placed around a perforation to ensure complete closure, then the reliability of closure is improved, but the difficulty of managing and tensioning individual sutures increases
Solution Approach 1:
Multiple tissue anchors are connected to a single suture, merging the function of multiple individual sutures into one continuous suture path. This allows all anchors to be deployed and tensioned simultaneously through a single suture management system, resolving the contradiction between using multiple anchors for reliable closure and the difficulty of managing multiple separate sutures.
2Manufacturing precision
If individual sutures are tensioned to ensure proper tissue approximation, then the quality of closure is improved, but the complexity of tensioning each suture individually increases
Solution Approach 1:
A single suture connects multiple tissue anchors, allowing the surgeon to tension all anchors uniformly through one suture. This merging approach maintains precise tissue approximation across all anchor sites while significantly reducing the complexity of individual suture tensioning procedures.
Solution Approach 2:
The single suture is segmented into multiple loops, each engaging a separate tissue anchor. This segmentation allows independent positioning of each anchor while maintaining unified tensioning control through the continuous suture, resolving the contradiction between precise individual approximation and simplified overall management.
3Ease of operation
If a single suture connects multiple anchors for simplified management, then the ease of operation is improved, but the ability to independently tension each suture is reduced
Solution Approach 1:
The single suture is divided into multiple independent loops, each capable of engaging a separate tissue anchor. This segmentation provides adaptability by allowing selective tensioning or adjustment of individual anchor loops while maintaining the overall simplicity of single-suture management, thus resolving the contradiction between ease of operation and independent tensioning capability.
Data Source
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AI summary
Medical devices for attaching suture to tissue and that provides reliable and complete closure of perforations and increases the versatility of the device for various other procedures. Embodiments of the medicals devices include a tissue anchor (20) having a crossbar (24) with opposing ends (26,28) and structure (30) for slidably receiving a suture (22).