Device for treating regurgitation of tricuspid and implantation method therefor
A device for treating regurgitation of a tricuspid valve ( 4 ) is disclosed. The device comprises a tricuspid valve plug ( 21 ) capable of compressing and expanding and a tricuspid valve plug fixing device used for anchoring the tricuspid valve-in-plug ( 21 ) to an orifice of the tricuspid valve ( 4 ). The tricuspid valve plug ( 21 ) is provided with an inflow end ( 42, 52 ) and an opposite outflow end ( 47, 57 ), and a prosthetic valve ( 50, 70 ) capable of being opened and closed is disposed in the tricuspid valve plug ( 21 ). When the tricuspid valve ( 4 ) is dosed, the prosthetic valve ( 50, 70 ) is automatically closed, and when the tricuspid valve ( 4 ) is opened, the prosthetic valve ( 50, 70 ) is automatically opened.
1. A device for treating tricuspid regurgitation, comprising
a compressible and expandable plug with a prosthetic valve inside (valve-in-plug),
a fixation device for anchoring the valve-in-plug to block a native tricuspid valve leakage gap,
wherein the valve-in-plug has an inflow and opposite outflow end,
characterized in that,
the valve-in-plug fixation device comprises a hollow sleeve connected to the inflow end or proximal end of the valve-in-plug, and a guide wire passing through the prosthetic valve and the hollow sleeve;
a distal end of the guide wire is provided with an anchor;
and a proximal end of the guide wire and a proximal end of the hollow sleeve are used to position the valve-in-plug by adjusting the relative position by means of a control handle.
2. The device for treating tricuspid regurgitation according to claim 1 , wherein
the valve-in-plug that comprises a stent, a membrane and the prosthetic valve;
the stent has a shape of one or combination of a tube shape, a cone shape or a spherical shape, having a lattice structure, and is compressible and expandable;
the membrane covers at least a portion of an inner and/or outer surface of the stent;
the prosthetic valve is sewn within the stent.
3. The device for treating tricuspid regurgitation according to claim 2 , characterized in that,
the stent is a lattice structure with rhombic and/or hexagonal meshes, and densities of the rhombic and/or hexagonal lattice structures gradually decrease from a middle part to both ends;
prosthetic valve is sewn to the rhombic and/or hexagonal lattice in the middle part having a higher density than both ends;
the stent is made of a shape memory alloy material, including a Ni-Ti alloy.
4. The device for treating tricuspid regurgitation according to claim 2 , characterized in that,
the stent is formed by a laser cutting technique, integral 3D printing technique or by braiding.
5. The device for treating tricuspid regurgitation according to claim 2 , characterized in that,
the membrane is made of any one selected from the group consisting of polyethylene material, artificial blood vessel material, polyurethane material, porcine or bovine pericardium material; and
the prosthetic valve is made of porcine or bovine animal valves, biological tissue material, polymeric material, or a tissue engineered valve.
6. The device for treating tricuspid regurgitation according to claim 2 , characterized in that,
the stent is in a shape of a truncated cone tube and/or cone;
the stent has a total length of 20 - 80 mm and an inner diameter of 0-50 mm.
7. The device for treating tricuspid regurgitation according to claim 6 , characterized in that,
the anchor is configured to be fixed on a myocardium near an apex of a right ventricle;
the anchor is made of shape memory alloy, including a Ni-Ti alloy.
8. The device for treating tricuspid regurgitation according to claim 6 , characterized in that,
the hollow sleeve is passed through the valve-in-plug, forming a channel for sliding the guide wire through the valve-in-plug.
9. A method for implanting a device for treating tricuspid regurgitation, comprising the following steps:
providing a device for treating heart valve regurgitation according to claim 1 ;
(1) making an incision in subclavian vein or jugular vein, the guide wire with the anchor provided at the distal end is extended from the incision into to a right ventricle, and the anchor is fixed to a myocardium near an apex of the right ventricle;
(2) compressing the compressible and expandable valve-in-plug having the inflow end and outflow end into a retractable sheath/tube, and delivering catheter; and the valve-in-plug is delivered along the guide wire to a native tricuspid valve orifice, the valve-in-plug is then released and expanded automatically, the sheath/tube, or the like, delivery catheter is withdrawn;
(3) adjusting a position of the valve-in-plug at the native tricuspid valve orifice by sliding and changing a relative position of the proximal end the guide wire and the proximal end of the hollow sleeve; and contacting the guide wire with a distal end of the hollow sleeve;
(4) completing implantation of the device for treating tricuspid regurgitation by embedding the proximal end of the guide wire and the proximal end of the hollow sleeve inside the body.
10. A method of using the device for treating heart valve regurgitation according to claim 1 , consisting of
treating mitral regurgitation and/or tricuspid regurgitation.