Transverse helical cardiac anchor for minimally invasive heart valve repair
Disclosed herein are various embodiments of cardiac anchors configured to be inserted into a heart wall of a patient to anchor a suture as an artificial chordae under an appropriate tension for proper valve function. Such cardiac anchors are particularly suitable for use in intravascular, transcatheter procedures.
1. A cardiac anchor configured to be implanted into a heart wall of a heart of a patient to anchor a suture configured to extend from a valve leaflet of the heart as an artificial chordae, the anchor comprising:
an anchor body including an actuation head at a proximal end of the anchor body configured to be engaged by an actuation tool to enact rotation of the anchor body;
a coil extending around at least a portion of the anchor body and distally of the anchor body, the coil having a distal tip configured to be transversely driven into and along the heart wall;
a flexible shaft extending from the anchor body distally through a longitudinal axis of the coil such that the flexible shaft extends distally beyond the coil; and
a blunt tip at a distal end of the flexible shaft, wherein the blunt tip and flexible shaft are configured such that the flexible shaft bends against the heart wall when the blunt tip is forced against the heart wall to stabilize a position of the coil with the longitudinal axis of the coil in a position generally parallel relative to the heart wall.
2. The cardiac anchor of claim 1 , wherein the blunt tip is configured to contact the heart wall without penetrating tissue of the heart wall.
3. The cardiac anchor of claim 1 , wherein the flexible shaft limits an insertion depth of the coil into the heart wall.
4. The cardiac anchor of claim 3 , wherein the flexible shaft defines a maximum insertion depth of the coil into the heart wall.
5. The cardiac anchor of claim 1 , wherein the flexible shaft is configured as a coil.
6. The cardiac anchor of claim 1 , wherein the blunt tip is configured as a spherical ball.
7. The cardiac anchor of claim 1 , wherein the coil defines a threaded exterior on the anchor body.
8. The cardiac anchor of claim 1 , wherein the coil defines a series of coil turns configured such that only a portion of each coil turn is embedded in the heart wall.
9. The cardiac anchor of claim 1 , further comprising a suture lock configured to lock the suture with respect to the anchor body.
10. A cardiac anchor configured to be implanted into a heart wall of a heart of a patient to anchor a suture configured to extend from a valve leaflet of the heart as an artificial chordae, the anchor comprising:
an anchor body including an actuation head at a proximal end of the anchor body configured to be engaged by an actuation tool to enact rotation of the anchor body;
a coil extending around at least a portion of the anchor body and distally of the anchor body, the coil having a distal tip configured to be transversely driven into and along the heart wall; and
means for orienting the coil transversely to the heart wall such that rotation of the coil causes the coil to become embedded transversely along the heart wall, wherein the means for orienting the coil bends against the heart wall to stabilize a position of the coil with the longitudinal axis of the coil in a position generally parallel relative to the heart wall.
11. The cardiac anchor of claim 10 , wherein the coil is configured to be stabilized in a position generally parallel to the heart wall.
12. The cardiac anchor of claim 10 , wherein the means for orienting the coil transversely to the heart wall is configured to contact the heart wall without penetrating tissue of the heart wall.
13. The cardiac anchor of claim 10 , wherein the means for orienting the coil transversely to the heart wall limits an insertion depth of the coil into the heart wall.
14. The cardiac anchor of claim 13 , wherein the means for orienting the coil transversely to the heart wall defines a maximum insertion depth of the coil into the heart wall.
15. The cardiac anchor of claim 10 , further comprising means for inserting the cardiac anchor intravascularly into the heart.
16. The cardiac anchor of claim 10 , further comprising means for locking the suture with respect to the anchor body.
17. A cardiac anchor configured to be implanted into a heart wall of a heart of a patient to anchor a suture configured to extend from a valve leaflet of the heart as an artificial chordae, the anchor comprising:
an anchor body including an actuation head at a proximal end of the anchor body configured to be engaged by an actuation tool to enact rotation of the anchor body;
a coil extending around at least a portion of the anchor body and distally of the anchor body, the coil having a distal tip configured to be transversely driven into and along the heart wall;
a flexible shaft extending from the anchor body distally through the coil such that the flexible shaft extends distally beyond the coil; and
a blunt tip at a distal end of the flexible shaft, wherein the coil defines a series of coil turns configured such that only a portion of each coil turn is embedded in the heart wall, the flexible shaft is configured to bend against the heart wall when the blunt tip is forced against the heart wall to stabilize a position of the coil with the longitudinal axis of the coil in a position generally parallel relative to the heart wall.
18. The cardiac anchor of claim 17 , wherein the blunt tip is configured to contact the heart wall without penetrating tissue of the heart wall.
19. The cardiac anchor of claim 17 , wherein the flexible shaft limits an insertion depth of the coil into the heart wall.
20. The cardiac anchor of claim 17 , wherein the flexible shaft is configured as a coil.
21. The cardiac anchor of claim 17 , wherein the blunt tip is configured as a spherical ball.
22. The cardiac anchor of claim 17 , wherein the coil defines a threaded exterior on the anchor body.
23. The cardiac anchor of claim 17 , further comprising a suture lock configured to lock the suture with respect to the anchor body.