Stent Assistant Extension for Arteriovenous Suturing
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Solution Overview
Problem
Arteriovenous surgery is prolonged due to difficulties in connecting veins and arteries, and stents implanted in veins may be displaced due to blood flow or external forces, leading to unsmooth blood flow and reduced surgical success rates.
Innovation Solution
A stent with an assistant extension portion comprising ring layers, a connecting layer, and an assistant extension portion with a fixed end connected to a second crown and a free end having holes, allowing for easier suturing and providing mechanical strength to maintain the connection between veins and arteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If regular stent implantation is used, then the stent can be placed in the vein, but the surgery time is prolonged due to difficulty in connecting veins and arteries through suturing
Solution Approach 1:
The assistant extension portion is pre-formed on the stent with a hole positioned at a specific location. This preliminary preparation allows the surgical needle to be directly inserted through the hole during surgery, eliminating the need for complex suturing operations and significantly reducing surgery time.
Solution Approach 2:
The assistant extension portion acts as an intermediary structure that facilitates the connection between vein and artery. The hole in the extension portion serves as a guide for the surgical needle, making the suturing process simpler and faster while ensuring proper positioning at the arteriovenous junction.
2Reliability
If stent is implanted in vein, then the stent can maintain vein structure, but the stent may be displaced due to blood flow or external forces
Solution Approach 1:
The assistant extension portion is pre-positioned to extend beyond the vein opening at the arteriovenous junction. This preliminary positioning ensures that the extension portion can be exposed during surgery and used as an anchor point, preventing stent displacement caused by blood flow or external forces.
Solution Approach 2:
The assistant extension portion with its hole serves as a self-anchoring mechanism. The hole allows the surgical needle to pass through and secure the stent at the correct position, enabling the stent to self-stabilize at the arteriovenous junction without requiring additional complex fixation mechanisms.
3Measurement precision
If stent is displaced from arteriovenous junction, then the stent moves away from target position, but regular observation markers are insufficient for accurate follow-up
Solution Approach 1:
The assistant extension portion with its distinctive hole structure serves as an enhanced visual marker. The hole provides a clear reference point that is easier to detect and track than conventional markers, enabling accurate observation of stent position and movement during follow-up examinations.
Solution Approach 2:
The assistant extension portion acts as an intermediary reference structure between the stent body and the external observation system. The hole in the extension portion provides a precise reference point that facilitates accurate tracking of stent position and detection of any displacement during postoperative follow-up.
Data Source
AI summary
A stent having assistant extension portion includes a plurality of ring layers, connecting layer, and assistant extension portion. Each ring layer has a plurality of first crowns connected to each other. The connecting layer has the first crown and a second crown connected to each other. The connecting layer and the ring layers are connected to each other to form a stent body, and the connecting layer is located at one end of the stent body. The assistant extension portion has a fixed end and a free end, the fixed end of the assistant extension portion is connected to the second crown, and the free end of the assistant extension portion has at least one hole.