Implantable device for treating mitral valve regurgitation
An implantable device for treating mitral valve regurgitation, the device being configured to expand from a compressed state into an expanded state. The device comprises a stent element consisting of (i) an atrial anchoring stent-portion, and (ii) a valve-carrying stent-portion being fixedly connected with one another, and a valve-element. The atrial anchoring stent-portion has a balloon-like shape and the valve-carrying stent-portion has a cylindrical shape, such, that the valve-carrying stent-portion is positioned intra-annular without contacting the annulus of a native mitral valve.
1. Implantable device for treating mitral valve regurgitation, the device being configured to expand from a compressed state into an expanded state, and comprising:
a stent element comprising
an atrial anchoring stent-portion, and
a valve-carrying stent-portion,
the atrial anchoring stent-portion being fixedly connected with the valve-carrying stent-portion,
wherein the atrial anchoring portion, in the expanded state of the device, has a balloon-like shape and is so dimensioned as to have a diameter which is larger than a diameter of an annulus of a native mitral valve present between an atrium and a ventricle of a heart to be treated, and is so dimensioned and configured to anchor the device via radial force in an atrium of a heart to be treated when the device is in the expanded state,
wherein the valve-carrying stent-portion, in the expanded state of the device, has a substantially cylindrical shape with a diameter (d 3 ) which, in the expanded state, is so dimensioned as to be smaller than a diameter of an annulus of a native mitral valve of a heart to be treated, such that there is no contact between the annulus of the native mitral valve and the valve-carrying stent-portion; and
a valve element comprising a skirt-portion and a valve-portion, the skirt-portion being externally mounted to the valve-carrying stent-portion, and the valve-portion being internally mounted to the valve-carrying stent-portion.
2. The device of claim 1 , wherein, when implanted, the valve-element is so dimensioned and configured such that the native mitral valve's function is supported without replacing or impairing the native mitral valve's function.
3. The device of claim 1 , wherein the atrial anchoring stent-portion and the valve-carrying stent-portion are integrally formed.
4. The device of claim 1 , wherein the atrial anchoring stent-portion is configured to be anchorable in an atrium of a heart.
5. The device of claim 1 , wherein the skirt-portion and the valve-portion of the valve element are made of a same material.
6. The device of claim 5 , wherein the skirt-portion and the valve-portion of the valve element are made of pericardium.
7. The device of claim 1 , wherein the valve element is a bi- or tri-leaflet valve.
8. The device of claim 1 , wherein the stent-element is made of a shape-memory material.
9. The device of claim 8 , wherein the stent-element is a laser-cut stent-element and/or composed of wires.
10. The device of claim 8 , wherein the atrial anchoring stent-portion and/or the valve-carrying stent-portion is made from braided or otherwise intersected wires.
11. The device of claim 8 , wherein the atrial anchoring stent-portion and/or the valve-carrying stent-portion is made from wire-loops.
12. The device of claim 8 , wherein the stent-element is made of ninitol.
13. The device of claim 1 , wherein the substantially cylindrical shape of the valve-carrying stent-portion, in the expanded state of the device, has a substantially continuous diameter (d 3 ) along its cylindrical length (l).
14. Method for treating mitral valve regurgitation, the method comprising the step of deploying the device as claimed in claim 1 in a heart of a patient in need of being treated.