In Vivo Branched Graft Deployment via Sequential Conduit Securing
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Solution Overview
Problem
Endovascular repairs of aortic aneurysms are challenging and time-consuming, especially when aneurysms involve branching vessels, requiring multiple access sites and complicating the surgery.
Innovation Solution
A method for locating and deploying a branch graft from a first conduit to a second conduit, where the second end of the branch graft is moved in a secondary step after the first end is secured in the first conduit, allowing for the construction of a branched graft with access from one or two locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple access sites are used to construct a branched graft, then the graft can be successfully deployed to treat aneurysms involving branching vessels, but the surgery becomes more complicated and causes more trauma to the patient
Solution Approach 1:
The graft is divided into multiple segments including a main body portion and one or more branch portions. Each segment can be deployed independently through separate access sites, allowing the complex branched structure to be constructed in modular fashion. The main body portion is deployed first, followed by the branch portions that extend from it, reducing the overall surgical complexity compared to deploying the entire branched structure at once.
Solution Approach 2:
The main body portion of the graft is deployed first through a primary access site before the branch portions are deployed. This preliminary deployment establishes the foundation structure, and subsequent branch portions are then attached or deployed from this established main body, simplifying the overall procedure by breaking it into sequential steps rather than requiring all access sites to be utilized simultaneously for complex maneuvers.
2Reliability
If multiple access sites are used to construct a branched graft, then the graft can be successfully deployed, but the surgery becomes more time-consuming
Solution Approach 1:
The graft is divided into multiple segments including a main body portion and one or more branch portions. Each segment can be deployed independently through separate access sites, allowing the complex branched structure to be constructed in modular fashion. The main body portion is deployed first, followed by the branch portions that extend from it, reducing the overall surgical complexity compared to deploying the entire branched structure at once.
Solution Approach 2:
The main body portion of the graft is deployed first through a primary access site before the branch portions are deployed. This preliminary deployment establishes the foundation structure, and subsequent branch portions are then attached or deployed from this established main body, simplifying the overall procedure by breaking it into sequential steps rather than requiring all access sites to be utilized simultaneously for complex maneuvers.
Data Source
AI summary
A branched graft method includes securing a first end of a branch graft into a first conduit and subsequently moving the second end into a second conduit. The first conduit may be a branch vessel, such as a renal artery and the second conduit may be a main graft that extends over an aortic aneurysm. The branch graft may be deployed starting at an offset distance from the first end, thereby preventing the deployed portion from insertion into the first conduit and predetermining the insertion length into the target vessel. The first end may then be deployed to secure the first end to the first conduit. A branch graft may be a self-expanding stent graft having one or more ripcords, and/or a serpentine ripcord that enables non-linear deployment of the branch graft, or deployment that does not progress from one end to the opposing end.