Tissue shaping device
An anchor anchors a therapeutic device having an elongated body within a body lumen. The anchor includes a fixation member carried on the device which is adjustable from a first configuration that permits placement of the device in the body lumen to a second configuration that anchors the device within the body lumen. The anchor further includes a lock that locks the fixation member in the second configuration. The fixation member may be locked in any one of a plurality of intermediate points between the first configuration and a maximum second configuration.
1. A mitral valve therapy device configured for deployment within a coronary sinus, the therapy device comprising an expandable distal anchor, a proximal anchor, and an elongate body extending therebetween, the elongate body defining a longitudinal axis of the therapy device, the expandable distal anchor comprising:
a flexible elongate member and a securing member for securing a first and second end of the flexible elongate member therein at a distal end of the securing member, the securing member generally aligned with the elongate body along the longitudinal axis, a first segment of the flexible elongate member extending from a distal end of the distal anchor to a proximal end of the distal anchor to engage the elongate body proximal the distal end of the elongate body, and a second segment of the flexible elongate member extending from where the first segment engages the elongate body to the distal end of the distal anchor, the first segment crossing the second segment at a location between the distal and proximal ends of the distal anchor, the distal anchor further having a collapsed configuration for delivery into the coronary sinus within a catheter and an expanded configuration for anchoring the distal anchor in the coronary sinus, the location being positioned radially outward from the securing member when the distal anchor is in the expanded configuration.
2. The mitral valve therapy device of claim 1 , wherein the flexible elongate member is a wire.
3. The mitral valve therapy device of claim 1 , further comprising a lock to secure the distal anchor in an anchored configuration.
4. The mitral valve therapy device of claim 3 , wherein the anchored configuration is substantially the same as the expanded configuration.
5. The mitral valve therapy device of claim 1 , wherein engagement of the first and second segments of the flexible elongate member to the elongate body comprises a loop in the flexible elongate member around the elongate body.
6. The mitral valve therapy device of claim 5 , further comprising a lock element proximate the distal end of the elongate body and proximal end of the expandable distal anchor, wherein the lock element is configured such that the loop can be moved from a first side of the lock element to a second side of the lock element to lock the distal anchor in an anchored configuration.
7. The mitral valve therapy device of claim 6 , wherein the first side of the lock element is proximal to the lock element and the second side of the lock element is distal to the lock element.
8. The mitral valve therapy device of claim 1 , wherein the location is at a first axial position along the longitudinal axis relative to the securing member when the distal anchor is in the collapsed configuration, and the location is at a second axial position when the distal anchor is in an anchored configuration.
9. The mitral valve therapy device of claim 8 , wherein the location of the first axial position is proximal of the location of the second axial position.
10. The mitral valve therapy device of claim 1 , wherein proximal portions of the first and second segments of the flexible elongate member are configured such that, upon receiving a distally directed force from the catheter during therapy device delivery, the proximal portions will collapse radially inwardly toward the securing member, facilitating recapture of the distal anchor of the therapy device within the catheter.