Valve stent and interventional prosthetic heart valve

Abstract

The invention aims to provide a valve stent with small volume, good fatigability and strong anchoring force and an interventional prosthetic heart valve. The valve stent is characterized by comprisingan upper ring stent, a middle ring stent located at one side of the upper ring stent, and a lower ring stent located on one side, far away from the upper ring stent, of the middle ring stent, whereinthe upper ring support is provided with an upper ring, upper ring connecting rods and upper ring barbs, the upper ring connecting rods and the upper ring barbs are arranged on the extending direction, towards the middle ring stent, of the upper ring; the middle ring support is provided with a middle ring, middle ring connecting rods, a middle ring connecting holes, middle ring barbs and middle ring traction rings; the middle ring connecting holes are evenly distributed in the middle ring and inserted by the corresponding upper ring connecting rods, so that the middle ring stent is connected with the upper ring stent, the middle ring connecting rods are arranged on the extending direction, towards the lower ring stent, of the middle ring, and the middle ring barbs are arranged on the extending direction, towards the upper ring stent, of the middle ring; and the lower ring support is provided with a lower ring, lower ring connecting holes and lower ring traction rings.

Description

technical field [0001] The invention belongs to the field of medical equipment, and relates to a valve support and an interventional heart prosthesis valve. Background technique [0002] Cardiac prosthetic valves are artificially manufactured organs that can be implanted in the heart to replace the original heart valves and control the one-way flow of blood in each chamber of the heart. With the development of the national economy and the aggravation of population aging, in recent years, the incidence of valvular heart disease has gradually increased, and the incidence population is also gradually younger. For patients with severe valvular disease who are elderly, complicated with multiple organ diseases, have a history of thoracotomy, and poor heart function, interventional treatment of valvular heart disease has many advantages such as no need for thoracotomy, less trauma, less pain, and faster recovery. , has been favored by more and more patients. [0003] Prosthetic v...

AI Technical Summary

Problems solved by technology

[0004] An analysis of the traditional mitral / tricuspid prosthetic valve found that it has at least one of the following disadvantages: First, the "sharp corners" and "barbs" are easy to break, and the deformation direction of the "barbs" of traditional valves It is the same or opposite to the displacement direction of the valve stent, and the axial stress is also relatively large, so it is very prone to fracture; second, the anchoring is unstable at the initial postoperative stage, when the "barb" punctures the original leaflet annulus Finally, the human body will produce a phenomenon called "endothelialization": endothelial cells, etc. will gather near the wound, forming connective tissue to wrap the wound and "barbs", so that the "barbs" and the heart "integrate" to achieve Anchoring effect, but "endothelialization" usually takes about 3 months to complete, so in the early postoperative period, "endothelialization" has not been completed, the "barbs" are not stable enough, and the prosthetic valve is easy to loosen; third, the fatigue performance of the stent Poor; Fourth, LVOTO (left ventricular outflow track obstruction) occurs after mitral prosthetic valve intervention. The traditionally designed prosthetic valve has a large ventricular end, which will hinder the left ventricular contraction. Blood in the left ventricle is ejected from the aorta

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