Device for reconstructing covered stent blood vessel combination of aortic arch part and three branches

Abstract

The invention discloses a device for reconstructing a covered stent blood vessel combination of an aortic arch part and three branches. The device comprises three artificial blood vessel assemblies, wherein the three artificial blood vessel assemblies comprise a direct cylindrical artificial aorta blood vessel (1), a small stent blood vessel (2) and a direct cylindrical pipeline (11); the direct cylindrical artificial aorta blood vessel (1) comprises an aorta vascular adventitia (7) and an aorta endovascular stent (8); the far end part (8a) of the aorta endovascular stent (8) and the outside vascular adventitia are integrally designed, and a near end part (8b) is a naked stent which can be released later; the small stent blood vessel (2) comprises a small stent vascular adventitia (9) anda small stent endovascular stent (10); the head end part (10a) of the small stent endovascular stent (10) and a top end part adventitia (9a) of the small stent vascular adventitia (9) are integrally designed, and the tail end part (10b) and the lower end part adventitia (9b) of the small stent vascular adventitia (9) are separately designed. Through the adoption of the blood vessel assemblies disclosed by the invention, the aortic arch part and the three-branch blood vessel can be quickly reconstructed; even branch blood vessels have large variation, original normal blood vessel form can alsobe kept to the maximum degree; the device is suitable for various blood vessels having deformed branches, and is wide in application range, stent customizing is avoided, batch production can be performed, operation wounds can be effectively reduced, and the surgery operations are notably simplified.

Description

Technical field [0001] The invention relates to the field of implantable stent blood vessels, and relates to a stent graft assembly with three branches that can be used to reconstruct the aortic arch. Background technique [0002] Thoracic aortic aneurysm and aortic dissection are serious diseases that seriously threaten the lives of the masses of people. If not actively treated, the natural disability rate and death rate are high. In recent years, with the increase in the incidence of hypertension, hyperlipidemia, hyperglycemia, and trauma, the incidence of thoracic aortic aneurysm and aortic dissection has increased significantly. At present, for aortic diseases involving the proximal ascending aorta and the aortic arch, direct-view aortic arch replacement surgery is still the only option. At present, the most mature aortic arch replacement surgery requires an artificial blood vessel to replace the diseased blood vessel under deep hypothermic circulatory arrest. The three bran...

AI Technical Summary

Problems solved by technology

[0003] Since the three branch vessels from the aortic arch in each patient: the innominate artery, the left common carotid artery and the left subclavian artery run differently, the distance between the openings of the three branch vessels, the arrangement angle, and the diameter of each branch vessel are different. , so that the shape of the three-branched blood vessels in the combined arch is very different, and it is impossible to completely match the arch blood vessels of different patients through a prefabricated stent blood vessel

Once the stent vessel does not match the target vessel, endovascular repair cannot be completed well

[0004] At present, the three-branched stent-graft vessel that is tried to be used in open surgery is only reported by Chen Liangwan’s group in China. The three-branched stent vessel they designed has obvious disadvantages: ①The three-branched vessels in the human body have large differences in course and diameter, The combined three-branch vascular system varies greatly. The stent blood vessels used by Chen Liangwan’s team are blood vessels with fixed branches, which cannot be completely prefabricated to match the stents of various blood vessel conditions, and the occurrence of endoleaks is high.

②The three branches are fixed with the main stent vessel. When implanting, the three branches and the main vessel must be placed at the same time. The operation is difficult and the branch vessels are easy to be damaged

However, this stent cannot completely prefabricate three-branch vessels of different calibers, and when the position of the branch opening varies greatly, the blood vessels at the opening are easily twisted and compressed, and the vascular membrane of the branch vessels on the greater curvature is not supported by a stent, and internal fistulas are prone to occur in the vascular lesions of the greater curvature

It is difficult to accurately place the three-branch vessels, especially when the branch variation is large, it will affect the blood flow of the branch vessels and the lumen of the main vessel

[0008] The application publication number is CN 108403255 A, a novel arch stent system and its application method, including cross-arch main body stent and branch stent, the size of the branch stent can be pre-determined before operation, but for patients with type A aortic dissection, Due to the pressure of the true lumen of the blood vessel, the size of the true lumen cannot be measured according to the image before operation, so it is difficult to accurately select the size of the main stent. If the main stent is selected after circulatory arrest and three branches are made, the time of circulatory arrest will be significantly increased , increased surgical risk

In addition, in the implementation of this invention, when the stent is implanted, the main blood vessel and the three branches must be inserted simultaneously, which is difficult to operate and easily damages the blood vessel.

At the same time, the stent vessel at the proximal end of the device needs to be clamped after implantation, and the vessel containing the metal stent inside the clamp is likely to deform the stent and damage the target vessel outside the vessel, and it is difficult to perform further anastomosis at the proximal end of the clamped vessel operate

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