Transfemoral artery valve conveying system

Abstract

A disclosed transfemoral artery valve conveying system comprises an inner core tube assembly, an inner sheath tube assembly and an outer sheath tube assembly, and a far-section outer tube of the outer sheath tube assembly is provided with a plurality of first hollowed-out grooves and second hollowed-out grooves which are arranged in parallel at intervals in the radial direction; and the arrangement density of the first hollowed-out grooves and the second hollowed-out grooves is gradually increased in a segmented mode from the near end to the far end in the axial direction of the far-section outer tube. The first hollowed-out grooves and the second hollowed-out grooves are formed in the opposite positions of the side wall of the far-section outer tube, the arrangement density of the hollowed-out grooves is gradually increased, and the width of the hollowed-out grooves is reduced, so that the far-section outer tube is very easily bent from one side wall to the other side wall, a near-section outer tube of the outer sheath tube assembly is of a woven structure, the strength is high, the bending of the far-section outer tube is easy to control, and the bending angle is adjusted to be 90-180 degrees. Therefore, the conveying sheathing canal is very easy to bend over the aortic arch to reach the aortic valve.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a transfemoral valve delivery system. Background technique [0002] With the prolongation of human life span and entering an aging society, aortic valve disease has become one of the more common valve diseases. In western developed countries, the incidence of calcified aortic stenosis is second only to hypertension and coronary heart disease, and has become the primary cause of valve replacement in the elderly. Surgical aortic replacement has long been the mainstay of treatment for symptomatic aortic stenosis. However, due to the large trauma of traditional surgery, extracorporeal circulation is required, and the risk of surgery is high. A large number of patients give up surgical treatment due to fear of surgery due to advanced age, poor ventricular function, and serious complications. [0003] Transcatheter aortic valve replacement (TAVR) is a new type of ...

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