Percutaneous Arteriovenous Graft Implantation Device
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Solution Overview
Problem
Current methods for vascular access in patients with kidney failure, such as arterio-venous fistulas, require surgical intervention and are not suitable for all patients, while arterio-venous grafts are typically implanted by surgeons, limiting accessibility and increasing procedural costs.
Innovation Solution
The development of access devices and methods for percutaneous implantation of arterio-venous grafts using a vascular catheter with guidewires and stylets, allowing non-surgeons to create vascular access by accessing arteries and veins at secondary sites and forming a blood flow lumen through a subcutaneous tunnel, reducing invasiveness and procedural costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surgical intervention is used for arterio-venous fistula creation, then reliable vascular access is achieved, but patient selection is limited and procedural costs increase
Solution Approach 1:
The patent replaces the surgical mechanical system with a percutaneous mechanical system. Instead of requiring surgical incisions and tissue dissection, the device uses a percutaneous approach with a catheter and stylet to create a subcutaneous tunnel and form an arterio-venous graft through the skin, eliminating the need for surgical intervention while maintaining vascular access reliability
Solution Approach 2:
The patent introduces an intermediary subcutaneous tunnel structure that mediates between the arterial and venous access points. This tunnel, created through the skin and subcutaneous tissue, allows the graft to connect the artery and vein without requiring direct surgical exposure, thereby expanding patient selection flexibility while maintaining access reliability
2Reliability
If surgical implantation is used for arterio-venous grafts, then vascular access is established, but procedural costs and invasiveness increase
Solution Approach 1:
The patent replaces the surgical mechanical system with a percutaneous mechanical system. Instead of requiring surgical incisions and tissue dissection, the device uses a percutaneous approach with a catheter and stylet to create a subcutaneous tunnel and form an arterio-venous graft through the skin, eliminating the need for surgical intervention while maintaining vascular access reliability
Solution Approach 2:
The patent segments the vascular access procedure into distinct percutaneous components: a catheter for arterial access, a stylet for tunnel formation, and a graft for connection. This segmentation allows each component to be optimized for its specific function while collectively reducing overall procedural invasiveness compared to traditional surgical implantation
3Ease of manufacture
If percutaneous implantation method is used, then procedural costs are reduced and accessibility improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated percutaneous implantation device. The device combines the catheter for vascular access, the stylet for tunnel formation and graft delivery, and the graft itself into a unified system that can be implanted through a single percutaneous approach, thereby reducing procedural costs while managing device complexity through functional integration
Solution Approach 2:
The patent creates a universal percutaneous implantation device that can be used for various vascular access scenarios. The device incorporates multiple functionalities including arterial access, venous access, subcutaneous tunnel formation, and graft implantation, allowing a single device system to address multiple procedural needs and reduce overall healthcare costs
Data Source
AI summary
Methods, devices, and kits for implanting a vascular graft to perform hemodialysis treatments on patients with renal failure are disclosed. The kits can include access devices comprised of an access catheter having a guidewire lumen and stylet lumen, a guide tube having a curved distal end, a stylet, an actuator handle and a vascular graft. The methods describe techniques for using the described kits and devices for performing vascular procedures, such as percutaneous implantation of the vascular graft.