Stent Deployment Device with Fenestrated Segments for Branch Vessel Access
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Solution Overview
Problem
Existing endoluminal prostheses face challenges when deployed near branching vessels, as they may obstruct branch vessels and lack effective fluid communication, alignment with branch vessel openings, and secure anchoring.
Innovation Solution
A stent deployment device with a catheter, expandable stents, and balloons, featuring bendable tabs and radiopaque markers for alignment, and a design that includes fenestrations to maintain fluid communication with branch vessels, ensuring proper alignment and anchoring through self-expanding stents and a deployment system that allows for precise placement and expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a prosthesis is deployed near branching vessels, then the damaged vessel can be repaired, but the prosthesis may obstruct branch vessels
Solution Approach 1:
The prosthesis is divided into multiple segments with fenestrations that allow selective passage. The main body provides repair coverage while fenestrated segments create controlled openings for branch vessel access, preventing complete obstruction while maintaining repair effectiveness.
Solution Approach 2:
Different portions of the prosthesis have different properties: the main body is occlusive for repair, while fenestrated segments have localized openings. This local differentiation allows the prosthesis to simultaneously provide vessel repair and maintain branch vessel patency through selective permeability.
2Reliability
If a prosthesis is deployed near branching vessels, then the damaged vessel can be repaired, but fluid communication with branch vessels is compromised
Solution Approach 1:
The prosthesis incorporates fenestrated segments that create controlled fluid passage channels. These segments allow blood flow to continue through branch vessels while the main prosthesis body provides repair coverage, maintaining both repair effectiveness and fluid communication.
Solution Approach 2:
The prosthesis has localized fenestrated regions that provide fluid communication pathways. These fenestrations are strategically positioned to maintain blood flow to branch vessels while the rest of the prosthesis provides occlusive repair, achieving both repair and fluid communication functions simultaneously.
3Reliability
If a prosthesis is deployed near branching vessels, then the damaged vessel can be repaired, but alignment with branch vessel openings is difficult to achieve
Solution Approach 1:
Radiopaque markers are incorporated into the prosthesis to provide visible contrast during imaging. These markers allow real-time visualization and alignment of the prosthesis with branch vessel openings during deployment, enabling precise positioning without requiring complex manufacturing tolerances.
Solution Approach 2:
Radiopaque markers serve as an intermediary visual reference between the prosthesis and branch vessels. During deployment, these markers provide a visible guide that facilitates alignment with branch vessel openings, making the positioning process more accurate and less dependent on manufacturing precision alone.
4Reliability
If a prosthesis is deployed near branching vessels, then the damaged vessel can be repaired, but secure anchoring is compromised
Solution Approach 1:
The prosthesis includes fenestrated segments that create anchoring points while maintaining fenestration openings. The fenestrated structure provides both mechanical anchoring through the segmented design and fluid communication through the openings, achieving both secure anchoring and vessel repair simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables secure anchoring and fluid communication between the prosthesis and branch vessels, preventing obstruction and ensuring effective repair of damaged vessels while maintaining vessel integrity.
Implementation Method 1
The first balloon is expandable to a first diameter, while the second balloon is expandable to a second diameter. The stent is expandable and is self-expanding upon release from the deployment device.
Data Source
AI summary
A stent deployment device (110) is provided for deploying a stent in a lumen of a patient. The device can include a catheter (112), a first balloon (122) positioned near a distal end of the catheter and a second balloon (123) adjacent to the first balloon. Alternatively, the second balloon can be positioned over the first balloon. The device also includes an expandable stent (210) positioned over the first balloon and the second balloon. The first balloon comprises a semi-compliant material, a noncompliant material or a compliant material. Similarly, the second balloon comprises a semi-compliant material, a noncompliant material or a compliant material. The first balloon is expandable to a first diameter, while the second balloon can be expandable to a second diameter.