Aorta covered stent

Abstract

The invention discloses an aorta covered stent. The aorta covered stent comprises a membrane and multiple circles of metal stents for supporting the membrane. The metal stents are sequentially arranged in the axial direction of the membrane. Each metal stent can elastically deform in the radial direction of the membrane. The preset radial supporting force of the metal stents at the two ends of the membrane is smaller than that of the metal stents in the middle of the membrane. According to the aorta covered stent, as the strong preset radial supporting force of the metal stents in the middle acts on the vascular wall, and the covered stent acquires the sufficient supporting effect in the middle, so that the covered stent resists stent displacement without depending on the radial acting force of the metal stents at the two ends, the erosion and damage to the vascular wall from the two ends of the covered stent can be reduced, and symptoms of dissection patients at the near end and the far end of the covered stent can be remarkably reduced through the weak radial supporting force of the metal stents at the two ends.

Description

Technical field [0001] The invention relates to the technical field of medical devices, in particular to an aortic stent graft. Background technique [0002] The aortic blood flow is fast and the pressure is high. The blood flow is more likely to cause trauma to the blood vessel or enlarge the blood vessel trauma. Hypertension, connective tissue disease, and chest trauma may all cause aortic dissection. Aortic dissection refers to the passage of blood through the aortic intima tear into the aortic wall and cause separation of the normal arterial wall. It is one of the most common aortic diseases. Aortic dissection is the result of the interaction between abnormal media structure of the aorta and abnormal hemodynamics. When the structure of the aorta is abnormal, the aorta is prone to split. Aortic dissection is a dangerous and acute disease. Even if prompt and active treatment is given, it can still cause rapid death. If the aortic dissection is completely torn, there will be ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an aortic stent graft to solve the problem of injury or damage to blood vessels at both ends of the stent graft and complications at the distal or proximal ends of the stent

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