Adjustable Stent Graft Deployment for Aortic Arch 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, adjustment, and repositioning of stents or grafts within the vasculature using elongated members like strings or guidewires, with mechanisms for selective tensioning and release to accommodate varying anatomies and maintain a secure seal.
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 and high blood flow pressures
Solution Approach 1:
The stent graft incorporates adjustable tubular members made of elastic or superelastic materials that can be dynamically positioned and adjusted during deployment. The delivery system includes elongated members (strings, wires, or guidewires) that enable real-time repositioning and alignment of the stent graft at vessel intersections, accommodating anatomical variability while maintaining precise alignment through controlled tensioning and release mechanisms.
Solution Approach 2:
The patent utilizes elastic or superelastic materials that can change their physical state and mechanical properties in response to physiological conditions. The tubular members can expand, contract, and reposition themselves based on blood flow pressures and anatomical constraints, allowing the device to adapt to varying vessel geometries while maintaining secure alignment at intersections.
2Reliability
If conventional stent grafts are deployed, then vascular disease treatment is achieved, but device migration and leakage occur due to high blood flow pressures
Solution Approach 1:
The delivery system incorporates mechanisms for selective tensioning and release of the stent graft, allowing dynamic adjustment during deployment. The elastic tubular members can be progressively positioned and secured while maintaining stability against high blood flow pressures, with the ability to reposition if necessary to achieve secure anchoring without causing migration or leakage.
3Ease of operation
If conventional stent graft placement is performed, then vascular repair is achieved, but adjustment and retrieval of devices post-deployment is difficult
Solution Approach 1:
The delivery system incorporates elongated members (strings, wires, or guidewires) that extend through the stent graft and can be manipulated from the proximal end. These members enable selective tensioning to adjust the graft position and configuration post-deployment, and provide retrieval capabilities if necessary. The system allows progressive deployment and adjustment without requiring complex multiple-component assemblies.
4Adaptability or versatility
If conventional stent grafts are used, then vascular disease treatment is achieved, but surgical invasions are maximized and anatomical variations are not accommodated
Solution Approach 1:
The stent graft incorporates elastic or superelastic tubular members that can dynamically adapt to various anatomical configurations. The delivery system uses elongated members that enable minimally invasive deployment through percutaneous access, with the ability to adjust the graft position and configuration to accommodate anatomical variations without requiring complex surgical approaches.
Solution Approach 2:
The device utilizes materials and mechanisms that can change their physical state to accommodate different anatomical dimensions and geometries. The elastic tubular members can expand and contract, bend and reposition, allowing the same device design to adapt to various patient anatomies while maintaining therapeutic efficacy.
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 approach allows for precise placement and adjustment of stents or grafts without disrupting blood flow, securing them against migration, and enabling full deployment or partial exposure as needed, while minimizing surgical invasions and accommodating anatomical variations, thus improving therapeutic efficacy and patient outcomes.
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.