A new type of vascular assembly with branched stent-graft in the aortic arch

Abstract

The invention discloses a novel stent-graft-type blood vessel assembly with branches in the aortic arch. It includes four artificial blood vessel components: ① A part of the artificial aortic vessel (1) with a stent, wherein the proximal part (6) of the artificial aortic vessel (1) has a stent in the blood vessel, and the distal part of the artificial aortic vessel (1) The end part (7) is a simple vascular membrane, and the proximal section (7a) of the simple vascular membrane part (7) is used to anastomose three branch vessels; ② a small branch vessel (2); ③ a branch vessel with a stent (3) ;④ A section of partly covered stent vessel (4), wherein the proximal part (4a) of the partly covered stent vessel (4) is a bare stent, and the distal part (4b) of the partly covered stent vessel (4) It is a covered stent vessel. The use of this vascular component can isolate aortic lesions involving the aortic arch and ascending aorta, and at the same time can rebuild the blood flow of branch arteries, and can preserve the normal vascular shape to the greatest extent. It is suitable for various branched vessels, including large branch variations. The blood vessel has a wide range of applications, avoids custom-made stents, can be mass-produced, effectively reduces trauma, and is easy 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

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