Inwardly Folded Trailing Structure for LAA Occluder Safety

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Solution Overview

Problem

Existing LAA occlusion devices face issues of insufficient safety and manipulability due to their design, which can lead to injury of the LAA wall or inner tissue during implantation.

Innovation Solution

The occluder support features a mesh body with a trailing structure that is inwardly folded into a blunt shape, providing increased contact area and reducing the risk of tissue injury during implantation. The trailing structure is connected to the mesh body via sutures passing through holes, allowing for enhanced manipulability and safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the trailing structure is made sharp for easy penetration during implantation, then the implantation process is simplified, but the risk of injuring LAA wall or inner tissue increases

Engineering Contradiction:

Improveimplantation processVSAvoidtissue injury risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The trailing structure is inverted from a sharp configuration to a blunt configuration. This inversion maintains ease of implantation while eliminating the harmful sharp edges that could injure the LAA wall or inner tissue during the procedure

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The trailing structure is designed with a blunt shape beforehand to cushion and protect the LAA tissue during implantation. This pre-designed protective feature prevents tissue injury before it can occur during the implantation process

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Reliability

If the trailing structure is made long for better anchoring, then the anchoring stability is improved, but the manipulability and safety during implantation are reduced

Engineering Contradiction:

Improveanchoring stabilityVSAvoidmanipulability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The trailing structure is segmented into multiple struts that can be independently configured. This segmentation allows the structure to achieve adequate anchoring stability while maintaining a compact overall length that improves manipulability during implantation

Inventive Principle:

Principle #1Segmentation

3Reliability

If the contact area between trailing structure and LAA wall is increased for better anchoring, then the anchoring stability is improved, but the risk of tissue injury increases

Engineering Contradiction:

Improveanchoring stabilityVSAvoidtissue injury risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The trailing structure features local quality variations where the blunt shape provides increased contact area for anchoring stability, while the rounded edges and smooth surfaces at critical contact points minimize tissue injury risk. Different portions of the structure have optimized properties for their specific functions

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250107807A1Occluder support and preparation method therefor

Publication Date: 2025.04.03 SHANGHAI MICROPORT CARDIOADVENT CO LTD

AI summary

An occluder support and a preparation method thereof are disclosed. The occluder support includes a mesh body formed of multiple first struts and a trailing structure connected to a distal end of the mesh body. The trailing structure includes multiple circumferentially arranged second struts each inwardly folded into a blunt shape and brought into contact with a corresponding one of the first struts of the mesh body. Each pair of second and first struts in contact have one or more holes penetrated therethrough and are connected by a suture passing through the one or more holes. The occluder support has a closed proximal end and an open distal end.