Implant for treatment of a heart valve, in particular a mitral valve, material including such an implant, and material for insertion thereof
This implant ( 1 ) is formed by a helically wound wire ( 2 ). According to the invention, it has dimensions such that it is able to be screwed into the wall of the annulus ( 103 ) and/or into the cardiac wall ( 101 ) adjoining this annulus ( 103 ) such that a portion of said annulus ( 103 ) and/or of said wall ( 101 ) is located in the perimeter of the implant ( 1 ); and it comprises at least one first coil able, during said screwing of the implant ( 1 ), to insert itself into said wall while having a first dimension and at least one second coil having a second dimension, or adopting this second dimension after implantation, said second dimension being smaller than the first dimension such that the implant ( 1 ), once inserted, enables contraction of said wall portion located in the perimeter of this implant ( 1 ).
1. Implant for treating a heart valve, in particular a mitral valve of a heart, the implant comprising:
a helically wound wire capable of insertion into a wall of an annulus and/or a cardiac wall adjoining the annulus, the helically wound wire further comprising:
a conical portion comprising at least one complete coil, each complete coil being one 360 degree revolution of the wound wire, each complete coil of the conical portion having a continuously decreasing diameter from a pointed end for insertion to a non-pointed end of the conical portion, the conical portion capable of insertion into the wall such that a portion of the wall is located within the respective diameter of at least one complete coil and contracted during insertion of the conical portion; and
a cylindrical portion attached to the non-pointed end of the conical portion, the cylindrical portion terminating at a terminal non-pointed end opposite the pointed end of the conical portion such that the helically wound wire extends between and terminates at the pointed end of the conical portion and the terminal non-pointed end of the cylindrical portion, the cylindrical portion further maintaining contraction of the portion of the wall located within the diameter of the cylindrical portion during implantation of the cylindrical portion.
2. Implant according to claim 1 , characterized in that the conical portion is located, in the direction of screwing of the implant, in front of the cylindrical portion.
3. Implant according to claim 1 , characterized in that the wire constituting the implant is in a shape memory material, defining, in a first state, complete coils having a first diameter and, in a second state, complete coils having a second diameter.
4. Implant according to claim 1 , characterized in that the wire has a same structure along its entire length.
5. Implant according to claim 1 , characterized in that the wire comprises the conical portion constructed from a first material and the cylindrical portion constructed from a second material different from the first material.
6. Implant according to claim 1 , characterized in that the wire comprises the conical and cylindrical portions having different structures, for example solid, resistant portions and portions having a thinner cross-section able to break in case of exertion on the implant of stresses directed radially outwardly.
7. Implant according to claim 1 , characterized in that the implant further comprises radiopaque markers enabling visualization of portions of the implant through the body of the patient, in particular markers capable of visualizing an angular orientation of the implant when the implant comprises non-circular coils.
8. Implant according to claim 1 , characterized in that the implant further comprises means ensuring anchoring of the implant in the tissue with regard to screwing or unscrewing.
9. Implant according to claim 1 , characterized in that the cylindrical portion comprises coils of a consistent diameter.
10. Implant according to claim 1 , characterized in that the conical portion comprises at least two complete coils of continuously decreasing diameter from the pointed end.
11. Implant for treating a heart valve, in particular a mitral valve of a heart, made up of a helically wound wire, characterized in that:
it has dimensions such that it can be screwed into a wall of an annulus and/or into cardiac wall adjoining the annulus so that a portion of the annulus and/or of the wall is located in a perimeter of the implant; and
the implant comprises a plurality of complete coils, each complete coil being one 360 degree revolution of the wound wire, the plurality of complete coils including a first complete coil constructed from a first material and terminating at a pointed end for insertion, the first complete coil able, upon screwing of the implant, to insert itself into the wall and having a first continuously decreasing diameter from the pointed end, wherein the plurality of complete coils includes a second complete coil constructed from a second material different from the first material and terminating at a non-pointed end opposite the pointed end such that the implant extends between and terminates at the pointed end and the non-pointed end of the implant, the second complete coil having a second diameter;
after implantation, the second diameter being smaller than the first decreasing diameter such that the implant, once inserted, allows contraction of the wall portion located in the perimeter of the implant.