Vascular Coupling Device for Micro-Arterial Anastomosis
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Solution Overview
Problem
Current micro-arterial end-to-end anastomosis techniques are labor-intensive and risky due to manual suturing, which can lead to thrombosis and are challenging due to the small size of the arteries, with existing devices often being difficult to use and manufacture for microvascular applications.
Innovation Solution
A vascular coupling device with movable wing portions and tissue engaging members that adjust between configurations to securely couple and seal vessel ends, reducing the risk of thrombosis and facilitating efficient microvascular anastomosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual suturing is used to connect vessel ends, then the integrity of the vessel can be re-established, but the procedure becomes labor-intensive and time-consuming
Solution Approach 1:
The patent introduces a coupling device as an intermediary component that mediates the connection between two vessel ends. This device includes engagement structures that interface with the vessel walls and coupling mechanisms that join the two vessels, replacing the need for direct manual suturing while maintaining vessel integrity
Solution Approach 2:
The patent replaces the manual suturing mechanical system with a pre-fabricated coupling device that uses mechanical engagement structures, clips, or interlocking components to join vessels. This substitution eliminates the need for time-consuming needle and thread manipulation while achieving reliable vessel connection
2Reliability
If manual suturing is used to connect vessel ends, then the vessel can be reconnected, but the risk of thrombosis increases due to thread exposure to blood flow
Solution Approach 1:
The patent extracts the suture thread from the final configuration by using engagement structures that capture and secure vessel ends without requiring threads to remain exposed to blood flow. The coupling device maintains connection through mechanical means rather than thread embedding in the vessel wall
Solution Approach 2:
The patent converts the potential harm of thread exposure to blood flow by designing engagement structures that minimize thread contact with the lumen or eliminate it entirely. The coupling mechanism transforms the threading process into a controlled engagement that prevents thrombogenic reactions while maintaining secure connection
3Manufacturing precision
If micro-arterial anastomosis is performed on small arteries, then precise connection can be achieved, but the procedure becomes challenging due to the small size
Solution Approach 1:
The patent applies local quality by designing coupling devices with features specifically adapted to the local characteristics of small arteries. The engagement structures have dimensions, geometries, and mechanical properties optimized for the specific size and tissue characteristics of micro-arteries, enabling precise connection without general-purpose tools
Solution Approach 2:
The coupling device serves as an intermediary that bridges the gap between the surgeon's manipulation capabilities and the small scale of micro-arteries. The device provides mechanical leverage, visualization aids, and controlled engagement mechanisms that make handling tiny vessels easier while maintaining connection precision
4Reliability
If existing coupling devices are used for microvascular applications, then connection can be achieved, but the devices are difficult to use and manufacture
Solution Approach 1:
The patent segments the coupling device into modular components that can be manufactured separately and assembled. This segmentation allows each component to be optimized for its specific function and manufactured using appropriate processes, improving overall device manufacturability while maintaining connection reliability
Solution Approach 2:
The patent designs coupling devices with universal features that can accommodate different vessel sizes and types within the microvascular range. This multi-functionality reduces the number of specialized device variants needed, simplifying manufacturing processes and improving ease of use across different surgical applications
Data Source
AI summary
Methods, devices, apparatus, assemblies, and kits for performing a vascular anastomosis are disclosed. A device for a vascular anastomosis includes tissue engaging portions that can move between at least two configurations. In some embodiments, the tissue engaging portions move without the aid of moving parts, while in other embodiments the tissue engaging portions extend from one or more movable wings. The tissue engaging portions may be separated by a first distance when in a pre-deployment configuration and by a second distance when in a deployed configuration. A method includes engaging a plurality of tissue engaging members of a coupling device against first end tissue. After selectively engaging the tissue engaging members and first end tissue, the first end tissue is stretched by at least moving the tissue engaging members. The stretched first end tissue is coupled to the second end tissue by mating the coupling device to a mating anastomosis device.