An integrated stent artificial blood vessel with assembled suture-free branches and its application

Abstract

The invention belongs to the technical field of medical devices, and in particular relates to an integrated stent artificial blood vessel with assembled suture-free branches and its application, including an integrated main body artificial blood vessel, and the main body artificial blood vessel includes a proximal artificial blood vessel and a distal stent artificial blood vessel There is a skirt on the outside of the connection between the proximal artificial blood vessel and the distal stent artificial blood vessel; two branch artificial blood vessel mechanisms are arranged on the proximal artificial blood vessel, and the branch artificial blood vessel mechanism includes a port and an assembled suture-free branch, and the port is fixed On the proximal artificial blood vessel, the assembled suture-free branch can be quickly assembled and connected to the port; the distal stent artificial blood vessel is fixedly connected with a branch stent blood vessel. The artificial blood vessel of the distal stent and the proximal artificial blood vessel of the present invention are integrated, avoiding manual anastomosis during the operation; the skirt is continuously sutured with the aortic wall itself, which plays a role of fixed hemostasis; the main body has a subclavian artery under direct vision Branch stents can avoid extensive dissociation and anastomosis of the subclavian artery.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an integrated stent artificial blood vessel with assembled suture-free branches and its application. Background technique [0002] Open surgery is the main method for the treatment of acute type A aortic dissection and aneurysms involving the aortic arch. During the operation, the diseased ascending aorta and aortic arch are resected, the artificial blood vessels with branches are replaced, and artificial vessels with stents are implanted in the descending aorta. Blood vessel. The operation needs to be performed under deep hypothermic circulatory arrest, the operation is difficult, and the incidence of intraoperative and postoperative hemorrhage, nerve, liver and kidney function complications is high. The mortality rate of surgery is as high as 15% in foreign reports, and the mortality rate in domestic reports is relatively low. 5%-10%. It is necessary to continuously s...

AI Technical Summary

Problems solved by technology

The inventors of the present application found that the problems in this technology include: in order to realize the connection between the proximal artificial blood vessel and the distal aorta, it is necessary to place the distal end of the four-branch artificial blood vessel, the descending aorta itself, and the stent in the lumen of the descending aorta. The three parts of the artificial blood vessel are anastomosed end-to-end, and the connecting part is required to withstand high pressure without bleeding after anastomosis; however, the surgical site is relatively deep and difficult to expose, and the native aorta is fragile due to dissection lesions, and the probability of bleeding after anastomosis is high; Moreover, the lower body of the patient is in a state of circulatory arrest during this operation. Prolonged circulatory arrest will greatly damage the function of the organs of the whole body. Therefore, the anastomosis here is required to be "fast and good", and the surgeon's suturing skills are very high.

The structure of the suture-free parts in the present invention is complicated, and the operation is still complicated; in some patients, the thickness of the diseased blood vessels is different, and the internal support ring and the outer buckle ring to clamp the own blood vessels may be unevenly localized, and most of them are prone to necrosis and insufficient easy to bleed

[0008] Another idea to try to simplify the operation is to design a stent vessel with a branched stent graft. There are various designs with one branch, two branches, and three branches. Large and limited size stents are difficult to match with the variable spatial relationship of the own blood vessels, especially when multiple branches need to be implanted at the same time, the operation is difficult, and the branch blood vessels are easy to be damaged, and endoleaks occur frequently after implantation

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