Blood vessel anastomat

Abstract

The invention relates to a blood vessel anastomat which comprises a main body made from shape memory alloy. The main body is a tubular member, a tube wall is net-shaped, multiple deformable units areformed or defined among net lines of the main body, blood vessel inner wall fixing parts are arranged in the deformable units, the main body is changed from a closed-up state to an unfolded state forradial expansion and axial contraction after reaching phase-transition temperature, the deformable units are tight and the blood vessel inner wall fixing parts are located in the deformable units or are bent towards the inside of the main body when the main body is in the closed-up state, the deformable units expand to form rhombuses and the blood vessel inner wall fixing parts are turned out of the main body and sunken into the inner sides of blood vessel walls when the main body is in the unfolded state. By adopting the above scheme, the blood vessel anastomat performs suture without suturelines, ensures blood vessel smoothness and is easy and convenient to operate.

Description

technical field [0001] The invention specifically relates to a blood vessel stapler. Background technique [0002] In minimally invasive interventional surgery, the end-to-end anastomosis of blood vessels, especially the anastomosis and connection of the two ends of the severed blood vessels, is one of the most basic techniques. The pros and cons of anastomotic techniques and methods directly affect the success or failure of tissue and organ transplantation. [0003] At present, the suture method is the most effective in the traditional anastomosis method, but the process is complicated, the steps are cumbersome, the operation is difficult, the technique requires high precision, and the anastomosis requires less trauma. Especially during the suturing process, it is easy to cause damage to the vessel wall and narrow the anastomotic stoma. If the suture is staggered to the opposite vessel wall, it will lead to thrombus formation. It cannot be repaired and regenerated, so devi...

AI Technical Summary

Problems solved by technology

[0003] At present, the suture method is the most effective in the traditional anastomosis method, but the process is complicated, the steps are cumbersome, the operation is difficult, the technique requires high precision, and the anastomosis requires less trauma.

Especially during the suturing process, it is easy to cause damage to the vessel wall and narrow the anastomotic stoma. If the suture is staggered to the opposite vessel wall, it will lead to thrombus formation. It cannot be repaired and regenerated, so device researchers have been insisting on the development of vascular staplers

[0004] In order to solve the above problems, the Chinese invention patent No. CN201020663797 discloses a "titanium-nickel memory alloy blood vessel stapler", which includes a helical titanium-nickel memory alloy wire and sutures at both ends. The lower part automatically recovers and expands into the main body to ensure the concentric alignment of the blood vessels. Although the steps of blood vessel anastomosis are simplified, it still needs to be sutured with the help of tools, so it still has certain defects caused by suturing.

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