Trifurcated Modular Stent for Supra Aortic Access
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Solution Overview
Problem
Current stent-graft technologies face challenges in effectively bypassing diseased aortic regions while avoiding occlusion of critical branch arteries, requiring precise deployment to ensure blood flow and prevent complications like stroke or endoleaks.
Innovation Solution
A trifurcated modular stent device with a main body, bypass gate, primary artery leg, and distal artery leg, delivered via supra aortic access, which self-expands to engage the aorta and brachiocephalic artery, ensuring perfusion and minimizing the risk of kinking or collapse, thereby maintaining blood flow and reducing procedural complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stent-graft is placed to bypass the diseased portion of the aorta, then the diseased region is sealed off from blood flow, but critical branch arteries may be covered or occluded by the stent-graft
Solution Approach 1:
The stent-graft is divided into multiple segments including a main body, bypass gate, primary artery leg, and distal artery leg. Each segment can be independently positioned and deployed to selectively seal the diseased aortic portion while preserving patency of critical branch arteries through the modular architecture
Solution Approach 2:
The bypass gate acts as an intermediary structure that provides an alternative flow path for blood to reach branch arteries that would otherwise be occluded by the main stent-graft body, thereby maintaining both sealing effectiveness and branch artery perfusion
2Reliability
If the stent-graft is deployed to seal against the aorta wall, then blood flow is redirected through the stent-graft conduit, but precise deployment is required to prevent complications like stroke or endoleaks
Solution Approach 1:
The stent-graft is pre-assembled and pre-positioned within the delivery system in a constrained configuration before deployment. This preliminary positioning ensures correct orientation and placement, reducing the precision requirements during the actual deployment process and preventing malpositioning complications
Solution Approach 2:
The stent-graft transitions from a compressed, constrained state during delivery to an expanded, self-supporting state after deployment. This dynamic transformation allows the device to adapt to the aortic geometry while maintaining seal integrity, reducing the need for extreme deployment precision
3Reliability
If a traditional stent-graft is used to bypass the aorta, then the diseased portion is excluded, but the procedure requires complex deployment to ensure blood flow and prevent complications
Solution Approach 1:
The modular segmented design allows each component to be deployed in a controlled sequence, simplifying the overall procedure. The main body, bypass gate, and artery legs can be positioned and secured independently, reducing procedural complexity while maintaining effective disease exclusion
Solution Approach 2:
The stent-graft is designed to self-expand and self-position within the aorta upon deployment, reducing the need for complex manual manipulation and adjustment by the operator. The device automatically adapts to the vascular anatomy, simplifying the deployment process while ensuring reliable disease exclusion
Data Source
AI summary
The techniques of this disclosure generally relate to an assembly including a trifurcated modular stent device. The trifurcated modular stent device includes a main body, a bypass gate extending distally from a distal end of the main body, a primary artery leg extending distally from the distal end of the main body, and a distal artery leg extending distally from the distal end of the main body. The trifurcated modular stent device is delivered via supra aortic access such that the primary artery leg is deployed within the brachiocephalic artery providing immediate perfusion thereof.