Novel double-layer occluder

Abstract

The invention discloses a novel double-layer occluder which includes an occluder body. A fixer is arranged at the upper end of the occluder body, and a connector is arranged at the lower end of the occluder body. The occluder body is connected to an external conveying steel cable through the connector, the occluder body includes an outer layer and an inner layer which are composed of metal wires,one of the ends of the metal wires of the inner layer and the outer layer are respectively fixed to the fixer, and the other of the ends of the metal wires of the inner layer and the outer layer are respectively fixed to the connector. The novel double-layer occluder has the advantages of good stability, high anatomical adaptability, not prone to hemolysis, and low valve influence, and the closureof paravalvular leak, patent ductus arteriosus and ventricular septal defect by a transcatheter intervention method is completed; the radial support force is high; the instrument structure is compact, red blood cells are not prone to passing, and occluder-related hemolysis is not prone to causing; after the instrument is deformed and fixed, residual parts on and below the paravalvular leak are few, the device is not close to an artificial valve, and the opening and closing of the artificial valve are not prone to influencing; and the damage to an approach blood vessel is small, and blood vessel complications are fewer.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a novel double-layer occluder used for transcatheter occlusion of paravalvular leakage, patent ductus arteriosus and ventricular septal defect. Background technique [0002] Paravalvular leakage refers to leakage around the artificial valve after heart valve replacement, causing valve regurgitation. The main clinical manifestations are hemolytic anemia, cardiac insufficiency and infective endocarditis related to the degree of leakage and regurgitation. Wait. According to the statistics of the United States, about 2%-17% of patients after heart valve replacement have different degrees of paravalvular leakage. Among them, mitral valve leakage (7%-17%) is the most common, followed by aortic valve leakage (2%-10%), tricuspid valve and pulmonary valve leakage occur less frequently. However, previous observational studies have shown that mitral valve leaks are m...

AI Technical Summary

Problems solved by technology

Due to the large pressure gradient between the two ends of the shunt through the patent ductus arteriosus and ventricular septal defect, there is a risk of hemolysis after the previous patent ductus arteriosus and ventricular septal defect occluder occluder. Such as long-tube arterial duct) occluder fixation is very difficult, there is no suitable occluder for long-tube arterial ductus

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