Magnesium alloy renal artery stent

Abstract

The invention discloses a magnesium alloy renal artery stent, which relates to the technical field of medical devices, comprising a first support ring frame and a second support ring frame, a support piece is embedded on an axial fixing bar, the first support ring frame and the second support ring The outer surfaces of the frame are all provided with protruding belts, and one side of the second supporting ring frame is fixedly connected with a flexible net. In the present invention, by setting the first support ring frame and the second support ring frame made of magnesium alloy, the renal artery stent can be degraded in the blood vessel, which can effectively reduce the possibility of occurrence of problems such as vascular intimal hyperplasia, restenosis, and late thrombus. By setting the flexible net, the junction of the renal artery and the aorta can be avoided to be narrowed again. The first support ring frame and the second support ring frame do not need to protrude into the aorta, thus not affecting the normal transport of blood by the aorta. The protruding belt plays a role of preventing the first supporting ring frame and the second supporting ring frame from shifting to a certain extent.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a magnesium alloy renal artery stent. Background technique [0002] The renal artery is divided into the left renal artery and the right renal artery, branched vertically from the abdominal aorta, 1-2cm below the superior mesenteric artery, and enters the left and right kidneys respectively through the renal hilum. With the advancement of aging in recent years, renal The incidence of arterial stenosis is increasing. Renal artery stenosis can cause secondary hypertension and ischemic nephropathy. It is also an important cause of renal failure in the elderly. When there is stenosis, there is a high initial and late restenosis rate. Renal artery intraluminal stent implantation overcomes this shortcoming and has a high success rate. At the same time, studies have shown that stenting has also achieved better results in the treatment of this disease. The long-term recanalizati...

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Problems solved by technology

[0002] The renal artery is divided into the left renal artery and the right renal artery, branched vertically from the abdominal aorta, 1-2cm below the superior mesenteric artery, and enters the left and right kidneys respectively through the renal hilum. With the advancement of aging in recent years, renal The incidence of arterial stenosis is increasing. Renal artery stenosis can cause secondary hypertension and ischemic nephropathy. It is also an important cause of renal failure in the elderly. When there is stenosis, there is a high initial and late restenosis rate. Renal artery intraluminal stent implantation overcomes this shortcoming and has a high success rate. At the same time, studies have shown that stenting has also achieved better results in the treatment of this disease. The long-term recanalization rate of renal artery stent implantation has become an important alternative to surgical renal artery reconstruction due to its safety and few complications. The development of renal artery stent in China is still immature, and only a few manufacturers can produce it , more imitation of similar foreign products, clinical use is still dominated by imported foreign products, and peripheral vascular stents are often used instead, stents specifically targeting the renal artery are rare in the market, because renal artery lesions are often located at the opening of the renal artery After the stent is implanted, there must be 1-2mm protruding to the aorta to prevent the narrowing of the junction of the renal artery and the aorta, which obviously affects the hemodynamic shape of the aorta, especially after bilateral stent implantation is required. even more

[0003] A combined renal artery stent disclosed in Chinese patent application publication CN107647938A, although the formation of segmented stent combination is adopted, a certain number of segmented stents can be selected according to the location and range of the lesion to form a renal artery stent of appropriate length, but The renal artery stent still needs to protrude to the inside of the aorta to prevent the narrowing of the bifurcation of the blood vessel. Therefore, the problem that the renal artery stent affects the hemodynamic shape of the aorta is not solved, and the renal artery stent is prone to deviation in the renal artery. The phenomenon of shifting cannot guarantee the stability of the position after installation. In addition, the renal artery stent cannot be degraded and cannot reduce intimal hyperplasia.

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