Split type precisely-anchorable transcatheter valve-in-ring system

A split type precisely-anchorable transcatheter valve-in-ring system, characterized in that,

• the system comprises a split transcatheter valve-in-ring anchoring stent and a transcatheter artificial biological valve-in-ring,
• wherein a shape and structure of the transcatheter valve-in-ring anchoring stent are matched with a real structure of a natural annuloplasty ring of a patient, and supravalvular and subvalvular tissues after three-dimensional reconstruction based on imaging data of a failed valve after implantation of an artificial annuloplasty ring;
• the transcatheter valve-in-ring anchoring stent has a compressed state in which is it disposed in a catheter, a first anchoring state in which it is released via the catheter, and a second anchoring state in which it is combined with the transcatheter artificial biological valve-in-ring,
• in the first anchoring state, the transcatheter valve-in-ring anchoring stent is processed and shaped into a conical funnel shape with a large atrial surface and a small ventricular surface according to type, shape and size of the artificial annuloplasty ring previously implanted and the imaging data by three-dimensional reconstruction, the transcatheter valve-in-ring anchoring stent is input via the catheter and released, its deformation and reshaping allow it to adapt to a personalized alignment, bonding and docking with the supravalvular and subvalvular tissues of the failed valve so as to reshape a circular structure;
• in the second anchoring state, in the transcatheter valve-in-ring anchoring stent of the first anchoring state, the transcatheter artificial biological valve-in-ring is delivered via the catheter and is released by balloon expansion, and is combined with the transcatheter valve-in-ring anchoring stent, so that the transcatheter valve-in-ring anchoring stent is expanded together with the transcatheter artificial biological valve-in-ring from an original conical funnel shape to a cylindrical shape, and a centripetal return clip generated by a secondary deformation is tightly combined with the transcatheter artificial biological valve-in-ring to complete anchoring with a mitral valve site or a tricuspid valve site and subvalvular tissues;
• the transcatheter valve-in-ring anchoring stent is an umbrella tubular stent structure, comprising an atrial surface, a ventricular surface, and an anchoring stent connecting part therebetween, wherein the atrial surface is an umbrella shape corresponding to a real atrial surface's shape which is formed by the three-dimensional reconstruction of the imaging data, that is a first lattice portion;
• the ventricular surface is a plurality of positioning hook loops precisely aligned with leaflets' junction positions;
• the anchoring stent connecting part is a funnel shape with a round opening and has a second lattice portion, the anchoring stent connecting part is configured to undergo deformation and expansion to transform from the funnel shape in the first anchoring state to the cylindrical shape in the second anchoring state.