Endovascular Prosthesis With Openable Ducts for Branch Artery Repair
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Solution Overview
Problem
Conventional endovascular prostheses are limited in their ability to repair branched arteries, as a sealed tubular construct positioned across the opening of a branch artery would prevent blood flow to the branch artery, posing a challenge in treating degenerative diseases like aneurysms and dissections.
Innovation Solution
An endovascular prosthesis with selectively openable ducts that can be deployed to allow access to branch arteries, featuring a tubular body with ducts that can be opened during a repair procedure to facilitate the introduction of an expandable stent graft into the branch vessel, ensuring blood flow is maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed tubular construct is positioned across the opening of a branch artery, then the major artery can be repaired, but blood flow to the branch artery is prevented
Solution Approach 1:
The prosthesis is divided into a sealed tubular body and separate openable ducts. The ducts are segmented structures that can be independently opened to create access channels to branch arteries while the main tubular body remains sealed to contain the repair. This segmentation allows the repair function and branch access function to coexist without interfering with each other.
Solution Approach 2:
The ducts are designed with dynamic characteristics, allowing them to transition between a closed state (maintaining seal integrity) and an open state (providing access to branch arteries). The ducts can be opened during the procedure to allow stent graft deployment and then closed or secured to maintain the repair while preserving branch artery perfusion.
2Adaptability or versatility
If ducts are made selectively openable to access branch arteries, then branch artery treatment is enabled, but device complexity increases
Solution Approach 1:
The ducts are pre-formed and positioned within the tubular body during manufacturing, with their opening mechanisms pre-configured. The ducts are designed to be opened in a controlled sequence during the procedure, with the first duct opened to allow stent graft introduction, then subsequently closed or secured. This preliminary preparation simplifies the overall procedure while maintaining versatility.
Data Source
AI summary
Endovascular prostheses used to treat diseased blood vessels, such as arteries, are disclosed. In some embodiments, the endovascular prosthesis is configured to be implanted within the diseased blood vessels adjacent a diseased section. The endovascular prosthesis may include a selectively openable internal duct configured to sealingly receive an expandable endovascular prosthesis that extends into a side branch vessel of the diseased blood vessel.