Perivalvular leakage-proof transcatheter valve system and implanting method

Abstract

The invention provides a transcatheter valve system. The transcatheter valve system includes a valve portion and a perivalvular leakage-proof portion independent of the valve portion. The valve portion includes a valve frame, valve leaflets, sealing skirts and sutures for suturing the valve leaflets, the valve frame and the sealing skirts together. The perivalvular leakage-proof portion is independent of the valve portion and includes a fixing portion and a sealing portion; the fixing portion is used for anchoring the perivalvular leakage-proof portion on a corresponding position of lesion in the valve; and the sealing portion is used for filling a gap due to the fact that the valve cannot be attached on a wall well after being implanted. In operation, the perivalvular leakage-proof portion is implanted in a human body, and then the valve portion is implanted in the human body; on a good-adherent part, the implanted valve can compact the sealing portion of the perivalvular leakage-proof portion; on a poor-adherent part, the sealing portion is not fully compressed, and can fill the corresponding gap. The transcatheter valve system can effectively reduce the conveying diameter, can effectively select different perivalvular leakage-proof portion designs according to the lesion characteristics of different implanting points, and can greatly lower the occurrence rate of perivalvular leakage after the transcatheter valve is implanted.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a transcatheter valve system. Background technique [0002] Because transcatheter valves do not require thoracotomy like surgery, they have the advantages of less trauma and faster recovery. In recent years, as a new technology, they have been favored by doctors. Transcatheter valves are mainly delivered through a delivery system. Before implantation, the valve needs to be installed on the delivery system. During the implantation process, the valve needs to be delivered to the lesion site through the delivery system. [0003] Although transcatheter valves have achieved rapid development, especially in the last decade. However, there are still problems such as high vascular complications during implantation and high incidence of paravalvular leakage after implantation, especially for patients with severe calcification, the incidence of paravalvular leakage is ...

AI Technical Summary

Problems solved by technology

However, for the Direcflow valve, its in vivo injection molding method can effectively and fully fill the gap caused by poor valve apposition. However, due to the in vivo injection molding, the overall valve support strength is low, and there are problems in the opening and closing of the valve leaflets. The market feedback of this valve is not good; other designs, because of the addition of more materials, make the delivery diameter of the whole system after the valve is pressed too high, which affects the use in small-diameter blood vessels, and it is easy to increase the cost of the valve implantation process. Vascular complications, at the same time, because of the increased material, it also affects the operation of valve recovery and release. Therefore, in order to balance the impact of various aspects, the sealing material that can be increased is preferred, which can reduce the incidence of paravalvular leakage to a certain extent, but still There will be a greater incidence of paravalvular leak

[0005] In addition, relevant studies have shown that for patients with calcification, paravalvular leakage at the leaflet coaptation site is relatively easy to occur. The current structure design, if the designed anti-paravalvular leakage sealing structure can completely cover the valve leaflet coaptation area, it is relatively Difficult; if complete coverage is required, the design of the sealing group must be high enough, and if the sealing skirt is too high, improper operation will easily lead to blockage of the coronary artery

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