Modular Bi-luminal Endograft for Aortic Aneurysm Repair
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for treating abdominal aortic aneurysms, such as open surgery and endovascular aortic repairs, are invasive, costly, and pose risks due to anatomical variations and the need for precise placement of endograft devices to avoid impairing blood flow to nearby structures.
Innovation Solution
A modular bi-luminal endograft device with independently positioned components that can be self-expanded across aneurysms, featuring a braided frame and impermeable cover, allowing for flexible positioning and secure fixation to the arterial walls, accommodating disparate anatomies and morphologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional endograft devices are used with fixed geometry, then manufacturing is simpler, but they cannot accommodate anatomical variations and precise placement is difficult
Solution Approach 1:
The endograft device is divided into multiple independently positionable components including a proximal component and a distal component, each capable of being delivered and positioned separately. This segmentation allows each component to be optimized for its specific anatomical location while maintaining overall system versatility for different patient anatomies.
Solution Approach 2:
The device incorporates expandable elements that transition from a compressed delivery state to an expanded operational state. The proximal and distal components can be selectively expanded at different positions along the aorta, enabling dynamic adaptation to various anatomical configurations while maintaining a relatively simple base geometry.
2Reliability
If precise placement of endograft device is attempted to avoid impairing blood flow, then blood flow to critical structures is preserved, but placement precision requirements increase difficulty of operation
Solution Approach 1:
By dividing the endograft into separable proximal and distal components, the system provides independent positioning capability for each component. This allows the operator to precisely place each component at its optimal location relative to critical structures like the renal arteries, reducing the overall placement precision difficulty through distributed control.
Solution Approach 2:
The device components can be pre-positioned and configured during the delivery process before final deployment. This preliminary positioning allows for adjustment and optimization of component locations to ensure proper relationship with critical structures, making the final placement operation more manageable and precise.
3Reliability
If open surgical repair is performed, then complete aneurysm replacement is achieved, but invasive procedures and extended recovery time occur
Solution Approach 1:
The invention replaces the mechanical open surgical approach with an endovascular delivery system. Instead of requiring open incision, aorta clamping, and manual graft installation, the endograft components are delivered through the vascular system using catheters and guidewires, significantly reducing procedural invasiveness and recovery time while achieving comparable repair effectiveness.
Solution Approach 2:
The endograft device acts as an intermediary structure that is delivered through the vascular system to perform the aneurysm repair. This intermediary approach allows the repair to be performed endoluminally without direct open surgical access, reducing the need for extensive tissue dissection and muscle cutting that characterize open surgery.
4Adaptability or versatility
If multiple different EVAR devices with different sizes and shapes are used to address anatomical variations, then anatomical adaptability is improved, but device complexity and inventory requirements increase
Solution Approach 1:
The endograft system uses standardized proximal and distal components that can be independently selected and positioned. This modular segmentation allows a limited set of standardized components to accommodate a wide range of anatomical variations through different combination and positioning options, reducing the need for numerous custom device variants.
Solution Approach 2:
The proximal and distal components are designed as universal elements that can be used across different patient anatomies when positioned appropriately. Each component serves multiple functions by being selectively deployable at different locations and configurations, allowing a single standardized component design to address various anatomical requirements without requiring multiple specialized devices.
Data Source
AI summary
Modular endograft devices and associated systems and methods are disclosed herein. In several embodiments, an endograft system can include a first endograft device and a second endograft device that each include an integrated frame, a cover and a lumen within the cover. Each endograft device further includes a superior portion and an inferior portion. The superior portion can have a convexly curved outer wall and a septal wall. The first and second endograft devices can be configured to extend into a low-profile configuration with a first cross-sectional dimension and a first length and self-expand into an expanded configuration with a second cross-sectional dimension greater than the first cross-sectional dimension and a second length less than the first length. In the expanded configuration, the septal walls can press against each other and form a septum between the lumens of the first and second endograft devices.