Hybrid Braided Stent Structure for Plaque Coverage and Precise Placement

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing carotid artery stents face issues of low safety due to plaque fragmentation and inaccurate positioning, with cutting stents causing plaque breakage and braided stents having mismatched expansion rates leading to ineffective plaque coverage and downstream flow.

Innovation Solution

A hybrid braided stent with a single-layer structure formed by interweaving filaments of varying cross-sectional areas, combining fine and coarse filaments to provide uniform stress on plaques and precise positioning, while ensuring accurate expansion and coverage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a double-layer braided stent structure with outer braided stent and inner metal mesh is used, then plaque coverage is improved, but expansion rate mismatch occurs between layers

Engineering Contradiction:

Improveplaque coverageVSAvoidexpansion rate matching

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent merges the outer braided stent and inner metal mesh into a single integrated braided structure where both layers are formed simultaneously by braiding wires of different diameters together. This eliminates the expansion rate mismatch problem that occurs when separate layers are assembled, as both layers expand uniformly as a single unit during deployment.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses composite wire structures in the braiding process, combining wires of different diameters (first diameter for outer layer, second diameter for inner layer) into a unified braided stent. This composite approach allows both layers to be formed from the same material batch with consistent mechanical properties, ensuring synchronized expansion while providing different mesh sizes for simultaneous structural support and plaque coverage.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If cutting stent with open-loop structure is used, then stent delivery is simplified, but plaque coverage effectiveness deteriorates

Engineering Contradiction:

Improvestent deliveryVSAvoidplaque coverage

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent segments the stent structure into multiple braided wires of different diameters that are interwoven to create both open and closed loop configurations within the same stent body. This segmentation allows different regions of the stent to serve different functions: some areas provide structural support for delivery while other areas create fine mesh for plaque coverage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by using wires of different diameters in different locations within the braided structure. Thicker wires provide structural support and easier delivery, while thinner wires create smaller mesh openings for effective plaque coverage. This local variation in wire diameter allows the stent to simultaneously achieve ease of delivery and effective plaque coverage in different regions.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12594154B2Hybrid braided stent

Publication Date: 2026.04.07 SUZHOU ZENITH VASCULAR SCITECH LTD

AI summary

A hybrid braided stent includes a stent body (20). The stent body (20) is a single-layer structure. The stent body (20) is a tubular structure formed by interweaving a plurality of filaments. The end areas of at least two of the plurality of filaments are different.