Devices, systems, and methods for adjustably tensioning an artificial chordae tendineae between a leaflet and a papillary muscle or heart wall
The present disclosure relates generally to the field of medical devices for delivering artificial chordae tendineae in a patient. A system for adjusting tension in an artificial chordae tendineae includes an artificial chordae tendineae coupleable between a clip and an anchor. The clip is engageable with a leaflet of a heart valve while the anchor is engageable with a papillary muscle or heart wall. The anchor includes a body portion, and a locking portion coupleable with the artificial chordae tendineae and configured to allow movement of the artificial chordae tendineae in a first direction while preventing movement of the artificial chordae tendineae in a second direction opposite the first direction. An actuator is coupled to the locking portion for selectively releasing the locking portion to enable selective movement of the artificial chordae tendineae in the second direction.
1. A system for adjusting tension in an artificial chordae tendineae, the system comprising:
an artificial chordae tendineae coupleable between a clip and an anchor;
the clip engageable with a leaflet of a heart valve; and
the anchor engageable with a papillary muscle or heart wall, the anchor including:
a body portion;
a locking portion engageable with the artificial chordae tendineae and configured to allow movement of the artificial chordae tendineae in a first direction while preventing movement of the artificial chordae tendineae in a second direction opposite the first direction; and
an actuator proximally movable to selectively release the locking portion to enable selective movement of the artificial chordae tendineae in the second direction.
2. The system of claim 1 , the anchor further comprising a housing, the body portion, the locking portion, and the actuator disposed in or on the housing.
3. The system of claim 2 , wherein the locking portion moves in the second direction to lock the artificial chordae tendineae with respect to the housing to prevent the artificial chordae tendineae from moving in the second direction when the artificial chordae tendineae applies a force to the locking portion in the second direction.
4. The system of claim 1 , wherein the actuator is a filament extending proximally to a user so that the user can activate the actuator to release the locking portion by pulling the actuator.
5. The system of claim 1 , wherein the locking portion comprises a ball or roller for pressing the artificial chordae tendineae between the ball or roller and a surface of the locking portion to prevent the artificial chordae tendineae from moving in the second direction.
6. The system of claim 5 , wherein the actuator is coupled to the ball or roller to move the ball or roller away from the artificial chordae tendineae to enable the artificial chordae tendineae to move in the second direction.
7. The system of claim 1 , wherein the locking portion comprises a spring element for coupling to the artificial chordae tendineae to prevent the artificial chordae tendineae from moving in the second direction.
8. The system of claim 1 , wherein the locking portion comprises a clamp for engaging the artificial chordae tendineae and the actuator is coupled to the clamp for disengaging the clamp from the artificial chordae tendineae.
9. A device for adjusting tension of an artificial chordae tendineae, the device comprising:
an anchor engageable with a papillary muscle or heart wall, the anchor including:
a body portion; and
a locking portion engageable with the artificial chordae tendineae and configured to allow movement of the artificial chordae tendineae in a first direction while preventing movement of the artificial chordae tendineae in a second direction opposite the first direction; and
an actuator configured for selectively moving a portion of the locking portion proximally to release the locking portion to enable selective movement of the artificial chordae tendineae in the second direction.
10. The device of claim 9 , wherein the actuator is a filament extending proximally to a user so that the user can activate the actuator to release the locking portion by pulling the actuator.
11. The device of claim 9 , wherein the locking portion locks to prevent the artificial chordae tendineae from moving in the second direction when the artificial chordae tendineae applies a force to the locking portion in the second direction.
12. The device of claim 9 , wherein the locking portion comprises a ball or roller for pressing the artificial chordae tendineae between the ball or roller and a surface of the locking portion to prevent the artificial chordae tendineae from moving in the second direction.
13. The device of claim 12 , wherein the actuator is coupled to the ball or roller to move the ball or roller away from the artificial chordae tendineae to enable the artificial chordae tendineae to move in the second direction.
14. The device of claim 9 , wherein the locking portion comprises a spring element for coupling to the artificial chordae tendineae to prevent the artificial chordae tendineae from moving in the second direction.
15. The device of claim 9 , wherein the locking portion comprises a clamp for engaging the artificial chordae tendineae and the actuator is coupled to the clamp for disengaging the clamp from the artificial chordae tendineae.