Flat Elongated Dissecting Device for Vein Harvesting
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Solution Overview
Problem
Current vein harvesting techniques for vascular bypass grafting, such as open vein harvesting and endoscopic vein harvesting, face issues with invasive procedures, infection risks, and lower patency rates due to vein damage.
Innovation Solution
A no-touch technique using a blood vessel dissecting device with a flat elongated design that maintains contact with surrounding tissue to dissect and remove veins with the tissue layer intact, reducing injury to the vein and improving endothelial integrity, while also promoting nitric oxide synthase activity and delaying atherosclerotic processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open vein harvesting is used, then vein patency rate is improved, but harvesting site complications and invasiveness increase
Solution Approach 1:
A flat elongated dissecting device is introduced as an intermediary tool between the surgeon and the vein. The device includes a flat elongated body with a dissecting section at the distal end that contacts and separates the vein from surrounding tissue without directly exposing or touching the vein itself. This intermediary approach allows precise dissection while maintaining vein integrity and avoiding direct manipulation that could cause damage or infection.
Solution Approach 2:
The patent replaces traditional manual mechanical dissection methods with a specialized dissecting device that has a flat elongated body and dissecting section. This mechanical substitution allows for more controlled and precise tissue separation, reducing the need for extensive incisions and direct handling of the vein, thereby lowering infection risk while maintaining patency rates.
2Ease of operation
If endoscopic vein harvesting is used, then invasiveness is reduced, but vein damage increases and patency rate decreases
Solution Approach 1:
The flat elongated dissecting device serves as an intermediary that can be introduced through minimal access points. The device's slender profile allows it to navigate to the vein with minimal tissue disruption, while the dissecting section at the distal end enables precise separation of the vein from surrounding tissue without requiring extensive exposure or direct endoscopic manipulation that could damage the vein.
Solution Approach 2:
The dissecting device features a localized dissecting section at the distal end of the flat elongated body. This local quality concentration allows the device to perform precise dissection only where needed, minimizing overall tissue disruption and maintaining vein integrity. The dissecting section's specific geometry enables targeted tissue separation without affecting the broader vein structure.
3Ease of manufacture
If traditional dissection methods are used, then tissue separation is achieved, but endothelial integrity is compromised
Solution Approach 1:
The flat elongated dissecting device acts as an intermediary tool that separates tissue planes without directly contacting or damaging the vein endothelium. The dissecting section is designed to contact and separate surrounding tissue while the vein itself remains protected, maintaining endothelial integrity. This intermediary approach allows effective tissue separation while preserving the delicate endothelial lining.
Solution Approach 2:
The flat elongated body of the dissecting device has a thin, flexible profile that allows it to navigate tissue planes smoothly. The slender design enables the device to follow tissue contours and separate layers without creating sharp edges or points that could damage the endothelium. The flexible nature of the device allows it to adapt to the anatomical structure while maintaining gentle contact with tissues.
Data Source
AI summary
A blood vessel dissecting device method involves inserting a dissecting device into a living body, advancing the dissecting device along a vein, and dissecting the vein and tissue bound to the vein from other surrounding tissue.