Interventional Valve Leaflet Suturing for Reduced Bottom Volume

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing method of suturing the edge of a valve leaflet to the region between the valve skirt and the leaflet results in an increased volume at the bottom of the valve when compressed, making it difficult to insert and implant the interventional valve through a delivery system.

Innovation Solution

A method involving demarcating first and second fixing edges on the valve leaflet, folding the first fixing edges towards the valve skirt, and suturing them, while keeping the second fixing edge in a freely stretching state and suturing it as well, to reduce the thickness and volume of the valve leaflet at the bottom.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the edge of the leaflet is folded and sutured towards the region between the valve skirt and the leaflet, then the valve closure can be ensured, but the volume of the valve at the bottom of the leaflets increases

Engineering Contradiction:

Improvevalve closureVSAvoidvolume of valve at bottom of leaflet

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent divides the leaflet edge into two segments: the first fixing edge (folded and sutured to ensure closure) and the second fixing edge (kept in freely stretching state to reduce volume). This segmentation allows different parts of the same structure to serve different functions, resolving the contradiction between ensuring valve closure and reducing valve volume.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different treatments to different regions of the leaflet edge. The first fixing edge is folded and sutured to provide closure reliability, while the second fixing edge is kept in a freely stretching state to minimize volume at the bottom of the leaflet. This local differentiation allows simultaneous optimization of both closure function and compactness.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If the interventional valve is compressed into a columnar structure, then it can be delivered through vessels, but the increased volume at the bottom of the leaflet prevents successful insertion

Engineering Contradiction:

Improvedelivery through vesselsVSAvoidvolume of valve at bottom of leaflet

Core Design Contradiction:

Ease of operationVSVolume of moving object

Solution Approach 1:

By segmenting the leaflet edge into folded and non-folded portions, the patent creates a compact columnar structure for delivery while maintaining sufficient closure function. The second fixing edge in freely stretching state prevents excessive volume accumulation at the bottom, enabling successful insertion through delivery systems.

Inventive Principle:

Principle #1Segmentation

3Strength

If the edge of the leaflet is sutured outward, then the leaflet can be secured, but the leaflets separate due to tension resulting in delayed closure

Engineering Contradiction:

Improveleaflet securingVSAvoidvalve closure timing

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

Instead of suturing the edge outward as in conventional methods, the patent inverts the approach by folding the first fixing edge inward towards the region between the valve skirt and the leaflet. This inversion ensures that the leaflet maintains its closed position and does not separate under tension, thereby ensuring rapid and reliable closure.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20250090307A1Method for suturing valve leaflet and interventional valve

Publication Date: 2025.03.20 KINGSTRONBIOCHANGSHU CO LTD

AI summary

A method for suturing a valve leaflet includes: demarcating first fixing edges (11) on both sides of a leaflet (1) and a second fixing edge (12) at bottom of the leaflet (1); folding the first fixing edges (11) towards a region between a valve skirt (2) and the leaflet (1), and suturing the first fixing edges (11) onto the valve skirt (2); and causing the second fixing edge (12) to be a freely stretching state, and suturing the second fixing edge (12) onto the valve skirt (2).