Magnesium alloy renal artery stent

Abstract

The present invention discloses a magnesium alloy renal artery stent and relates to the technical field of medical devices. The magnesium alloy renal artery stent comprises a first support ring frameand a second support ring frame, support sheets are embedded in axial fixing strips, convex belts are arranged on outer surfaces of the first support ring frame and the second support ring frame, anda flexible net is fixedly connected to one side of the second support ring frame. The first support ring frame and the second support ring frame made of magnesium alloy are arranged, the renal arteryintravascular stent can be degraded in blood vessels and can effectively reduce possibility of problems of endangium hyperplasia, restenosis, late thrombus, etc., the flexible net is arranged to avoidrestenosis of a joint of the renal artery blood vessels and major artery blood vessels, the first supporting ring frame and the second supporting ring frame do not need to extend into the major artery blood vessels, therefore normal blood transportation of the major artery blood vessels is not affected, and the convex belts are arranged to play an effect of preventing the first supporting ring frame and the second supporting ring frame from deviating to a certain degree.

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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