Preset Guide Wire for Stent Branch Implantation

Solution Overview

Problem

Current stent implantation methods for thoracic abdominal aortic aneurysms, particularly fenestration and branch-type stents, require frequent guide wire exchanges and long surgery times due to complex anatomy and short anchoring areas, leading to increased technical difficulty and risk of postoperative endoleak.

Innovation Solution

The method involves using a preset guide wire with double soft heads that penetrates through the inner branch of the main stent, allowing for simplified path establishment and reduced guide wire exchanges by guiding a long sheath and catheter through the upper limb artery to facilitate the implantation of both main and branch stents, thereby shortening the implantation time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If frequent guide wire exchanges are performed during stent implantation, then the stent can be positioned accurately in complex anatomy, but the implantation time becomes excessively long

Engineering Contradiction:

Improvepositioning accuracyVSAvoidimplantation time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The guide wire is pre-configured with a preset path through the inner branch of the main stent before implantation. This preliminary configuration eliminates the need for frequent guide wire exchanges during the procedure, as the guide wire is already positioned to navigate the complex anatomy and reach the target branch artery, thereby reducing implantation time while maintaining positioning accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The preset guide wire acts as an intermediary element that facilitates the passage of the delivery system through the inner branch. By pre-establishing this pathway, the guide wire mediates between the complex anatomical structure and the stent delivery system, enabling smooth navigation without requiring multiple exchanges or complex maneuvers during implantation

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If preset guide wire technology is used to reduce guiding difficulty, then guide wire passage through the branch becomes easier, but guide wire exchange frequency increases or the entire artery must be used throughout

Engineering Contradiction:

Improveguide wire passage easeVSAvoidimplantation time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The guide wire is pre-configured with a preset path through the inner branch of the main stent before implantation. This preliminary configuration eliminates the need for frequent guide wire exchanges during the procedure, as the guide wire is already positioned to navigate the complex anatomy and reach the target branch artery, thereby reducing implantation time while maintaining positioning accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The guide wire is designed with different properties in different sections: the portion within the inner branch has specific characteristics to facilitate easy passage through the branch, while the overall wire maintains appropriate stiffness and flexibility for the specific anatomical requirements. This localized optimization allows easy guide wire passage without requiring the entire artery to be used throughout the procedure

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If the delivery system is made more complex to navigate twisted aneurysms, then the ability to reach target branch vessels improves, but the overall procedure complexity increases

Engineering Contradiction:

Improveability to reach target vesselsVSAvoidprocedure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The guide wire is pre-configured with a preset path through the inner branch of the main stent before implantation. This preliminary configuration eliminates the need for frequent guide wire exchanges during the procedure, as the guide wire is already positioned to navigate the complex anatomy and reach the target branch artery, thereby reducing implantation time while maintaining positioning accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The preset guide wire acts as an intermediary element that facilitates the passage of the delivery system through the inner branch. By pre-establishing this pathway, the guide wire mediates between the complex anatomical structure and the stent delivery system, enabling smooth navigation without requiring multiple exchanges or complex maneuvers during implantation

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11071638B2Implantation method of a stent system

Publication Date: 2021.07.27 LIFETECH SCI (SHENZHEN) CO LTD

AI summary

An implantation method of a stent system, and the implantation method including implanting a main stent; introducing a catcher; introducing a long sheath and a guiding catheter along a preset guide wire, so as to make the distal end of the long sheath and the distal end of the guiding catheter extend out from the distal end of the inner branch; the distal end of the long sheath and the distal end of the guiding catheter to respectively enter a target branch blood vessel; withdrawing the guiding catheter, and introducing a branch stent delivery along the long sheath to complete the implantation of the branch stent. The method greatly shortens the implantation time of the stent system by simplifying the path of the preset guide wire in the implantation process and fully utilizing the characteristics of the preset guide wire with double soft heads.