Modular Endograft Delivery System for Renal Artery Alignment
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Solution Overview
Problem
Conventional endovascular aneurysm repair methods, such as open surgery and EVAR, are invasive, costly, and require extensive recovery time, and existing endograft devices face challenges in precise placement and sealing due to anatomical variations and structural differences in aneurysms, necessitating large inventories of devices with varying sizes and shapes.
Innovation Solution
A modular bi-luminal endograft device with independently positioned components and a delivery system that allows for precise alignment with renal arteries, featuring expandable and constrictible designs, fenestrations for renal artery alignment, and a delivery system that facilitates percutaneous deployment, enabling improved sealing and adaptation to unique anatomies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional EVAR devices are used, then the procedure is less invasive than open surgery, but precise placement and sealing are difficult due to anatomical variations
Solution Approach 1:
The endograft device is divided into modular components including a main body and extendable limbs that can be independently positioned. This segmentation allows the device to be delivered through a catheter in a compressed state and then expanded to achieve precise placement and sealing against the vessel wall, resolving the contradiction between minimally invasive delivery and placement precision.
Solution Approach 2:
The endograft device incorporates extendable and adjustable limbs that can be dynamically repositioned after initial deployment. This dynamic capability enables precise alignment with renal arteries and adaptation to anatomical variations, achieving accurate placement while maintaining the benefits of minimally invasive percutaneous delivery.
2Manufacturing precision
If multiple customized endograft devices are maintained in inventory to accommodate anatomical variations, then placement precision can be improved, but device complexity and inventory requirements increase
Solution Approach 1:
The endograft device is designed as a universal platform with modular components that can be configured to accommodate various anatomical presentations. The main body and limbs can be extended and positioned independently to adapt to different vessel diameters, lengths, and angulations, eliminating the need for hospitals to maintain inventories of multiple specialized device sizes and configurations.
Solution Approach 2:
The adjustable and extendable features of the endograft allow a single device design to adapt to multiple anatomical scenarios. The limbs can be extended to different lengths and angles to match various renal artery positions and aortic geometries, providing placement precision comparable to customized devices without the inventory complexity.
3Ease of manufacture
If the endograft device is designed with fixed structure, then manufacturing is simpler, but adaptability to unique anatomies is reduced
Solution Approach 1:
The device uses modular segmented components that can be manufactured using standard processes and then assembled in various configurations. The main body and limbs are separate elements that can be independently manufactured and then connected, maintaining manufacturing simplicity while enabling adaptation to unique anatomies through different assembly configurations.
Solution Approach 2:
The endograft incorporates dynamically adjustable limbs that can be extended and repositioned after deployment. This dynamic capability allows a relatively simple fixed-structure main body to achieve complex anatomical adaptation through the movable limbs, maintaining ease of manufacture while providing versatility.
Data Source
AI summary
Modular endograft devices and associated systems and methods are disclosed herein. In several embodiments, an endograft system can include constrained first and second endograft devices that extend across a vascular defect and expanded to press mating septal walls against each other. At least one of the endograft devices can include a fenestration that is aligned with a renal artery to provide bloodflow to the artery. A delivery device configured in accordance with the present technology can include a guidewire that passes through the fenestration to guide the endograft to an implant site and self align the fenestration with the renal artery to facilitate connection of the endograft to the renal artery. An additional stent can be connected to the fenestration to secure the renal artery to the endograft device.