Stent artificial blood vessel

Abstract

The invention provides a stent artificial blood vessel which comprises a stent and a first covering film. The first covering film covers the periphery of the stent, the first covering film is provided with fixed sections and an expansion section, the two ends of the expansion section in the axial direction are connected with the fixed sections respectively, the fixed sections are fixedly connected with the stent, and at least one part of the expansion section in the circumferential direction is not fixed to the stent; wherein the area of the part, not in fixed relation with the stent, of the expansion section is larger than the area of the stent corresponding to the part, so that the stent artificial blood vessel can be at least partially separated from the stent through the expansion section, and an expansion cavity is formed by the first covering film. Through the design, according to the stent artificial blood vessel, through the design of the expansion section, the first covering film can make more sufficient contact with the blood vessel wall through the expansion cavity, and the gap between the artificial blood vessel and the blood vessel wall is completely sealed. Particularly, the aortic aneurysm isolation device is suitable for achieving aortic aneurysm isolation within the limit tumor neck length, and the phenomenon of internal leakage is avoided.

Description

technical field [0001] The invention relates to the technical field of artificial blood vessels, in particular to a stent artificial blood vessel. Background technique [0002] In the application of the existing artificial blood vessel technology, the intraluminal support type artificial blood vessel has been used as a means of repairing aortic aneurysm or aortic dissection, for example, treating infrarenal abdominal aortic aneurysm. For abdominal aortic aneurysms adjacent to renal artery lesions, the preferred repair plan is to isolate the abdominal aortic aneurysm while maintaining unobstructed renal artery blood flow. In addition to the surgical method of surgical repair of the lesion, the existing interventional treatment plan is to isolate the tumor by bridging the normal aorta at both ends of the tumor (that is, the "neck") to bridge the intraluminal supporting artificial blood vessel. While maintaining aortic blood flow. However, when the length of the "neck" is not...

AI Technical Summary

Problems solved by technology

Because the stent is used for positioning in the blood vessel cavity, corresponding support rigidity is required, so the contact between the stent and the vessel wall is insufficient point contact, so that the artificial blood vessel fixed on the stent cannot fully contact with the vessel wall, and cannot be completely Closes the gap between the artificial blood vessel and the vessel wall

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