Balloon expansion type interventional valve stent with folding wingspan skirt

Abstract

The balloon dilatation type interventional valve stent comprises a stent body, a valve leaflet and the wingspan skirt, the wingspan skirt is arranged on the outer side of an outflow channel, a traction suture is connected to the wingspan skirt, one side of the traction suture is connected with the wingspan skirt, and the other side of the traction suture is connected with a skirt on the side of an inflow channel. The traction sutures connected to the interiors of the skirt edges on the inflow channel side are gradually tensioned in the circumferential direction under the action of balloon expansionary force, so that the traction sutures in the wingspan skirt edges are tensioned, the wingspan skirt edges are folded in the axis direction of the stent body, and parts protruding outwards in the radial direction of the stent body are formed. Therefore, the perivalvular leakage is covered or blocked. The structure of the outflow channel is fully utilized, on the premise that the diameter of a conveying system is not increased, an available wingspan skirt structure is added, and the blocking effect of perivalvular leakage is greatly improved. In addition, due to the fact that flexible non-metal materials are used, damage to the heart cannot be increased by an additional structure.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a balloon-expandable interventional valve stent with a foldable wingspan skirt, which can be applied to the position and damage of aortic valve, pulmonary valve, mitral valve and tricuspid valve. Biological valve valve middle valve and other scenes. Background technique [0002] Paravalvular leak (PVL), the formation of a leak between the prosthetic valve and surrounding tissue, is a serious complication common to all heart valve procedures. Especially in the current increasingly mainstream transcatheter valve therapy, the incidence is extremely high. Several studies have shown that postoperative paravalvular leakage is directly related to the degree of recovery, reoperation rate, rehospitalization rate, and early, mid- and long-term mortality. Results from a multi-international meta-study showed that only 6-59% of patients did not develop paravalvular leaks after transcatheter a...

AI Technical Summary

Problems solved by technology

However, there are still problems in the existing valve structure. Since the size of the valve delivery system cannot be too large, the skirt cannot be thickene...

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