Improved aortic arch stent graft blood vessel

Abstract

An improved aortic arch stent graft blood vessel includes an aortic stent blood vessel and three branch arterial stent blood vessels, wherein the aortic stent blood vessel is in a pre-curved shape andcomprises a heart-proximal-end segment, a recessed portion and a heart-distal-end segment. The recessed portion comprises a first step and a second step. The heart-proximal-end segment has an opening1 on the upper middle portion of its right sidewall. An opening 2 is disposed on the right side of the first step. An opening 3 is disposed on the upper middle portion of the left sidewall of the heart-distal-end segment. Inner chimney brackets 1, 2, and 3 are fixed to the openings 1, 2 and 3 respectively. The three branch arterial stent blood vessels are disposed in the three inner chimney brackets respectively. The improved aortic arch stent graft blood vessel can prevent the mutual interference between the two inner chimney brackets at the heart-proximal end when compressed, so that the aortic stent blood vessel is easy to be compressed and placed into a small-diameter delivery system, and a guide wire and a catheter are likely to select respective inner chimney brackets.

Description

technical field [0001] The invention relates to the field of implantable blood vessels, and more specifically refers to an improved aortic arch covered stent-type blood vessel. Background technique [0002] The Chinese invention patent with the authorized notification number CN 102973303B is an aortic arch stent-graft type vessel invented by the applicant, which includes an aortic stent vessel and three branch arterial stent vessels. A section of depression is set on the aortic stent vessel. The concave portion includes a left side wall close to the proximal end, a right side wall away from the proximal end, and a bottom wall connecting the left and right side walls. The left side wall of the concave portion has two openings, and the right side wall has one or Two openings, each opening is fixed with a section of inner chimney bracket with a diameter equivalent to the opening, the inner chimney bracket extends along the side wall of the aortic stent in the direction away fro...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an improved aortic arch stent-graft type blood vessel to solve the problem that in the existing aortic arch stent-graft type blood vessel, two inner chimney stents arranged side by side interfere with each other in the radial direction when compressed, which affects the entire aortic stent-graft blood vessel. Compression, and the two inner chimney stents overlap each other in the radial direction, which brings difficulties to the delivery and release of branch arterial stents.

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