Aorta abdominalis covered stent

Abstract

The invention discloses an aorta abdominalis covered stent. The aorta abdominalis covered stent comprises a covered stent and a bare stent, wherein the covered stent is of a cylindrical structure, comprises a covered fluid passageway and is used for being matched with the inner wall of an aorta abdominalis and suitable for expanding the aorta abdominalis. The bare stent is in a wavy shape and connected with the top end of the covered stent, and comprises crest structures away from the covered stent and trough structures close to the covered stent, and a fluid passageway is formed between each crest and the corresponding trough. The aorta abdominalis covered stent further comprises upper anti-disengagement fixing structures arranged on the crest structures and lower anti-disengagement fixing structures arranged on the trough structures, wherein the upper anti-disengagement fixing structures are used for being fixed to the portions, above a renal artery, of the aorta abdominalis, the lower anti-disengagement fixing structures are used for being fixed to the portions, below the renal artery, of the aorta abdominalis, and therefore the whole aorta abdominalis covered stent can be fixed into the aorta abdominalis.

Description

technical field [0001] The invention relates to medical equipment, in particular to an abdominal aortic covered stent. Background technique [0002] Aortic aneurysm refers to local or diffuse abnormal expansion of the aortic wall, which causes symptoms due to compression of surrounding organs, and tumor-like rupture is its main risk. It often occurs in the ascending aorta, aortic arch, descending thoracic aorta, thoracoabdominal aorta, and abdominal aorta. The traditional surgical treatment method is thoracotomy and laparotomy for diseased aorta resection and artificial blood vessel replacement. The operation risk is high, and most of the lesions cannot be operated at all. disease. Since the 1990s, since the emergence of human abdominal aortic aneurysm endovascular exclusion, it has quickly become the first choice for the treatment of aortic aneurysms. [0003] Endovascular exclusion of aortic aneurysm is to perform CT angiography and other imaging examinations on patient...

AI Technical Summary

Problems solved by technology

Firstly, the stent device does not disclose that it can be used on the abdominal aorta. However, if the stent device is to be applied at the position of the abdominal aorta and renal artery, in order to make the stent expand as much as possible at the junction of the renal artery For the abdominal aorta, it is necessary to make the top edge of the graft connected with the stent as close as possible to the wall of the renal artery. In this prior art, only the pin at the crest is fixed on the wall of the abdominal aorta at the upper part of the renal artery. The pin in the middle will be located at the intersection of the renal artery and the abdominal aorta, and cannot be used for fixation, and the pin that cannot be used for fixation will actually hinder the circulation of blood, thereby slowing down the blood flow rate and reducing the The blood supply to the kidneys is blocked, which brings danger to the patient

Images