Endovascular Delivery System Preferential Rotation Alignment
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Solution Overview
Problem
Existing endovascular implant delivery systems often fail to align branch stent grafts or couplings with branch arteries or peripheral arteries, leading to potential occlusions in blood flow due to lack of patency.
Innovation Solution
The endovascular implant delivery system features a middle member with a main channel and a secondary channel, providing a preferential bending axis that allows for rotational alignment of the implant branch with peripheral or branch arteries by responding differently to torques applied in various radial orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a modular stent graft system is used to treat branch arteries, then the implant can be delivered through minimally invasive endovascular procedures, but the system fails to align the branch or coupling of the stent graft with the branch artery, leading to lack of patency and blood flow occlusions
Solution Approach 1:
The middle member is designed with asymmetric structural characteristics that create differential resistance to rotation about different axes. This asymmetry allows the delivery system to naturally align with the branch artery orientation during insertion, enabling precise angular alignment without complex external positioning mechanisms while maintaining minimally invasive delivery
2Adaptability or versatility
If the stent graft system is designed to accommodate branch arteries, then it can treat complex vascular anatomy, but the misalignment between the stent graft branch and the target artery causes occlusions and lack of patency
Solution Approach 1:
The delivery system incorporates self-aligning features through the asymmetric middle member design that automatically orients the stent graft branch in the correct angular position relative to the target artery during insertion. This self-alignment mechanism ensures reliable blood flow patency without requiring complex external positioning systems or manual adjustment, thereby maintaining both adaptability and reliability
Data Source
AI summary
An endovascular implant delivery system is configured to deploy an implant (e.g., a stent graft) having a branch within a peripheral/branch artery. The endovascular implant delivery system includes proximal and distal portions and a middle member extending therebetween. The middle member includes main and secondary channels to provide a preferential bending axis asymmetrically bisecting a radial cross section of the main and secondary channels. The middle member is configured to rotate against a first resistance in a first radial orientation in response to a first torque being applied to the middle member at the proximal portion and against a second resistance in a second radial orientation in response to a second torque being applied to the middle member at the proximal portion. The first resistance is less than the second resistance such that the first radial orientation is indicative of rotational alignment between the branch and a peripheral/branch artery.