Adjustable Elastic Stent Graft for Vessel Intersection Alignment
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Solution Overview
Problem
Conventional stent and stent graft placement technologies face challenges in accurately aligning and securing devices at the intersection of multiple vessels, particularly in the aortic arch, due to anatomical variability and high blood flow pressures, leading to issues like leakage, migration, and difficulty in adjusting or retrieving the devices post-deployment.
Innovation Solution
The development of implantable devices with adjustable tubular members made of elastic or superelastic materials, allowing for independent control of lumenal ends and deployment systems that enable precise positioning, expansion, and repositioning of stents or grafts within the vasculature using strings, guidewires, and articulating catheters, which can accommodate varying anatomies and reduce the need for multiple access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional stent and stent graft placement technologies are used, then device deployment is achieved, but accurate alignment and securing at vessel intersections is difficult due to anatomical variability
Solution Approach 1:
The stent graft incorporates adjustable tubular members made of elastic or superelastic materials that can be dynamically repositioned and adjusted during deployment. The tubular members can be independently controlled to accommodate varying anatomical configurations at vessel intersections, allowing the device to adapt to different angulations and positions while maintaining secure placement and alignment.
Solution Approach 2:
The device utilizes changes in material properties and geometric parameters to achieve adaptability. The elastic or superelastic materials allow the tubular members to change their shape and position in response to anatomical variations. The adjustable nature of the tubular members enables modification of deployment parameters such as angulation and positioning to match the specific anatomical requirements of each patient.
2Reliability
If conventional stent graft placement is used, then device deployment is achieved, but leakage and migration occur due to high blood flow pressures
Solution Approach 1:
The adjustable tubular members can be dynamically repositioned and secured in optimal locations to withstand high blood flow pressures. The elastic or superelastic materials provide dynamic compliance that allows the device to adapt to pressure variations while maintaining stable placement, reducing the risk of leakage and migration.
Solution Approach 2:
The stent graft combines different materials with complementary properties to achieve both flexibility and strength. The elastic or superelastic tubular members are integrated with the stent graft structure to provide a composite system that can handle high blood flow pressures while maintaining placement stability and preventing leakage.
3Ease of operation
If conventional stent graft placement is used, then device deployment is achieved, but adjustment and retrieval post-deployment is difficult
Solution Approach 1:
The deployment system incorporates adjustable tubular members that can be dynamically repositioned and adjusted even after initial deployment. This dynamic capability allows for post-deployment modification and retrieval operations, enhancing ease of operation while managing the complexity through controlled adjustability mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for precise alignment and secure placement of stents or grafts at complex vascular sites, minimizing leakage and migration risks, while enabling adjustment and retrieval post-deployment, thus improving therapeutic efficacy and procedural efficiency.
Implementation Method 1
adjustable tubular members made of elastic or superelastic materials
Implementation Method 2
adjustable tubular members made of elastic or superelastic materials
Data Source
AI summary
The present invention provides systems and methods for deploying implantable devices within the body. The delivery and deployment systems include at least one catheter or an assembly of catheters for selectively positioning the lumens of the implant to within target vessels. Various deployment and attachment mechanisms are provided for selectively deploying the implants.