Cannulation Guiding Device for Bifurcated Stent Access
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Solution Overview
Problem
Current endovascular devices face challenges in efficiently accessing the contra-lateral leg of bifurcated stent or stent grafts during abdominal aortic aneurysm treatment, particularly in tortuous, highly angulated, or diseased vessels, leading to increased procedural time and complexity.
Innovation Solution
A guiding device with an elongate inner tubular member and a pre-loaded guidewire segment is used to facilitate access to the contra-lateral leg by providing a larger target opening and direct entry, allowing for easier placement of a second guidewire and subsequent deployment of endo-legs, either through an expandable member or a suture loop mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional endovascular devices are used to access the contra-lateral leg of bifurcated stent or stent graft, then the procedure can be performed, but the procedural time increases and complexity increases due to difficulty in accessing tortuous, highly angulated, or diseased vessels
Solution Approach 1:
The cannulation guiding device is deployed within the bifurcated stent/stent graft before the second guidewire is introduced. The device includes a proximal portion with a target opening that presents a larger, more accessible entry point into the contra-lateral leg, and an intermediate portion that provides a tracking path through tortuous or angulated vessels. This preliminary placement of the guiding structure enables easier and faster access to the contra-lateral leg without requiring complex manual navigation through difficult vascular anatomy.
2Ease of operation
If conventional methods are used to access the contra-lateral leg, then the procedure can be completed, but device complexity increases due to the need for complex navigation through tortuous vessels
Solution Approach 1:
The cannulation guiding device is divided into distinct functional segments: a proximal portion with a target opening for guidewire entry, an intermediate portion with a tracking path that navigates through angulated or tortuous vessel sections, and a distal portion that interfaces with the contra-lateral leg. This segmentation allows each portion to be optimized for its specific function while working together as an integrated system, reducing the overall complexity compared to attempting single-device navigation through complex anatomy.
3Ease of operation
If the cannulation guiding device is deployed, then access to the contra-lateral leg is facilitated, but the device structure becomes more complex with proximal, intermediate, and distal portions
Solution Approach 1:
The cannulation guiding device serves multiple functions within a single integrated structure: it provides a target opening for easy guidewire entry, offers a tracking path through tortuous or angulated vessels, and facilitates access to the contra-lateral leg of the bifurcated stent/stent graft. By combining these functions into one device, the overall system complexity is reduced compared to using multiple separate devices or complex navigation tools.
Data Source
AI summary
The present invention is directed to an intraluminal guiding device having an expandable guiding member so as to facilitate and overcome the difficulties associated with obtaining contra-lateral leg access of a bifurcated stent or a bifurcated stent graft with a second guidewire and a method for treating abdominal aortic aneurysms with such a device. The guiding device comprises a pre-loaded second wire positioned within the contra-lateral leg which facilitates access to said leg in accordance with the present invention.