Covered stent type blood vessel combined kit for isolating aortic arch part and three branches

Abstract

The invention discloses a covered stent type blood vessel combined kit for isolating an aortic arch part and three branches. The kit comprises two artificial blood vessel assemblies: (1) a section ofan artificial aorta blood vessel (1) with a main body having a stent and three branches is provided; wherein the main body of the artificial aorta blood vessel (1) is a section of straight cylindricalstent blood vessel, which consists of an outer vascular membrane (4) and an inner stent (5), a near end part blood vessel membrane (4a) of the outer vascular membrane (4) and a front end part (5a) ofthe inner stent (5) are integrally designed; middle and far end blood vessel membranes (4b and 4c) of the outer vascular membrane (4) and a rear end part (5b) (5b) of the inner stent (5) are separately designed, the rear end part (5b) of the inner stent (5) is a bare stent, the rear end part (5b) of the inner stent (5) can be released backwards, and three branch blood vessels (6a, 6b and 6c) arearranged; and (2) a section of branch blood vessel (2) with the stent; the blood vessel combined kit can isolate aortic lesions involving an aortic arch and an ascending aorta, can reconstruct branchartery blood flow, can retain normal blood vessel forms to the maximum extent, is suitable for various branch-shaped blood vessels, is wide in application range, avoids customized stents, can be produced in batches, effectively reduces wounds and is easy and convenient to operate.

Description

technical field [0001] The invention relates to the field of implantable blood vessels, and relates to a three-branch covered stent-graft blood vessel assembly that can be used in the aortic arch. Background technique [0002] Thoracic aortic aneurysm and aortic dissection are serious lesions that seriously threaten the lives of the general public. Without active treatment, the natural disability rate and mortality 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, the use of aortic endovascular stent repair has good curative effect, less trauma and easy operation. However, aortic arch aneurysms and aortic dissection involving the innominate artery, left common carotid artery, and left subclavian artery ostium have always been difficult points in this treatment technique. In order to ensure the ...

AI Technical Summary

Problems solved by technology

But this method has the following disadvantages: 1, the support should be customized according to the patient's specific anatomical situation, and the cost is high and cannot be mass-produced; 2, the customized support takes a long time and cannot be used for emergency surgery patients; It is required that each side hole is accurately aligned with the affected branch artery, if there is any deviation, it may lead to blood flow disturbance in the branch artery and corresponding complications, which may be life-threatening in severe cases.

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

But compared with the present invention, there are following problems: 1. The stent of the main blood vessel is designed to be implanted in two stages before and after use. When the stent vessel in the front section is placed separately, the stent is prone to be stable because the vessel section supported by the stent is very short. Insufficient sex, there may be displacement, which will affect the opening of branches and affect the processing of subsequent branches

②The vascular membrane of the main vessel is designed to be separated from the front and rear sections. It is required that the vascular membrane part of the rear section must fully overlap with the front section when the stent vessel is implanted, but the risk of endoleak is still increased

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