Stent-Graft Guiding Element for Precise Branch Vessel Alignment
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Solution Overview
Problem
Existing stent-graft prostheses face challenges in precise alignment and implantation in main vessels aligned with branch vessels, requiring complex navigation and increased X-ray dosage, leading to prolonged procedures and potential complications.
Innovation Solution
A stent-graft prosthesis system with a guiding element, such as a textile thread or wire, attached to the stent-graft prosthesis for precise positioning and delivery, allowing for single delivery of side vessel branches with reduced X-ray exposure and simplified implantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional stent-graft prostheses are used for implantation in main vessels aligned with branch vessels, then the prosthesis can be delivered to the target site, but precise alignment with branch vessels is difficult and requires complex navigation
Solution Approach 1:
A guiding element (thread or wire) is introduced as an intermediary between the stent-graft prosthesis and the branch vessel. The guiding element is delivered through the branch vessel ostium and attached to the prosthesis, serving as a mediator that enables precise alignment and positioning without requiring complex navigation procedures. This intermediary component simplifies the alignment process by providing a direct mechanical guide.
2Measurement precision
If complex navigation procedures are used to achieve precise alignment, then alignment accuracy improves, but X-ray dosage increases
Solution Approach 1:
The guiding element acts as a mechanical intermediary that enables precise alignment through direct physical guidance rather than relying on continuous X-ray imaging for navigation. This reduces the need for fluoroscopic guidance during the alignment process, thereby lowering X-ray dosage while maintaining alignment precision.
Solution Approach 2:
The guiding element is delivered and positioned in advance before the stent-graft prosthesis is deployed. By preliminarily establishing the alignment path through the branch vessel ostium and attaching the guiding element to the prosthesis, the system enables subsequent easy alignment without requiring repeated X-ray imaging during the alignment process.
3Manufacturing precision
If precise alignment procedures are implemented, then implantation accuracy improves, but procedural time increases
Solution Approach 1:
The guiding element is delivered and positioned in advance before the stent-graft prosthesis deployment. This preliminary action establishes the alignment path and attachment point, so that when the prosthesis is deployed, precise alignment is achieved quickly without requiring time-consuming adjustment procedures during the implantation process.
Solution Approach 2:
The guiding element serves as a mechanical mediator that provides continuous alignment guidance during prosthesis deployment. This eliminates the need for repeated imaging and adjustment, thereby reducing procedural time while maintaining implantation accuracy.
4Reliability
If traditional delivery methods are used, then the prosthesis can be implanted, but multiple delivery steps are required for side vessel branches
Solution Approach 1:
The guiding element delivery and the stent-graft prosthesis delivery are merged into a single integrated procedure. The guiding element is delivered through the branch vessel ostium first, and then the stent-graft prosthesis is delivered along the same path using the guiding element as a track, combining what would traditionally be separate delivery steps into one coordinated procedure.
Solution Approach 2:
The guiding element serves as a mediator that enables single-delivery of the stent-graft prosthesis to the side vessel branch. By providing a pre-established path and attachment point, the guiding element allows the prosthesis to be delivered in one continuous action rather than requiring multiple separate delivery steps, thereby simplifying the overall delivery procedure while maintaining reliability.
Data Source
AI summary
The present application discloses a stent-graft prosthesis and a method for navigating such stent-graft prosthesis e.g. to a branch vessel. A first stent-graft prosthesis may include a main body and at least one lateral side branch connected to the main body. A further stent-graft prosthesis according to examples has a body having a generally tubular wall structure, the wall structure of the further stent-graft prosthesis including an orifice element (610) for receiving a guiding element (10). Preferably the wall structure has an overlap region (630) for interconnection, e.g. to the first stent-graft prosthesis. The orifice element (610) is then arranged at said overlap region, wherein said overlap region is preferably arranged at a proximal end region of said body. The guiding element (10) preferably is a textile thread or suture thread, optionally with a radiopaque marker, such as a fiducial marker and/or a radiopaque elongate marker extending at least along a portion of a length of said guiding element (10).