Methods, devices, and systems for percutaneously anchoring annuloplasty rings
Apparatus, systems, and methods are provided for percutaneous transcatheter delivery and fixation of annuloplasty rings to heart valves. An annuloplasty ring includes an outer tube, an inner body member, and an anchor deployment system. The outer tube includes a plurality of windows and has an axis along its length. The internal body member includes a plurality of anchors formed perpendicular to the axis. The anchor deployment system selectively rotates the internal body member with respect to the axis of the outer tube. The rotation deploys the plurality of anchors through the plurality of windows.
1. An annuloplasty device for transcatheter heart valve repair, the annuloplasty device comprising:
a tubular body member comprising shape memory material, the tubular body member including a plurality of anchors cut therein, each of the plurality of anchors cut along a circumference of the tubular body member such that, in an introduction configuration, the anchors are in a radial plane of the tubular body member and are concentric with the tubular body member, the plurality of anchors heat treated to a deployed configuration that extends away from the radial plane of the tubular body member;
a retaining ribbon to hold the plurality of anchors in the introduction configuration and to selectively release the plurality of anchors to the deployed configuration; and
one or more retainer features extending from an outer surface of the tubular body member, the one or more retainer features to hold the retaining ribbon against the outer surface of tubular body member and the plurality of anchors in introduction configuration, and the one or more retainer features allowing the retaining ribbon to slide along the surface of the tubular body member to selectively release one or more of the plurality of anchors,
wherein the tubular body member is configured to change from an elongate insertion geometry to an annular operable geometry, the annuloplasty device configured to pass through a catheter and into a heart chamber in the elongate insertion geometry and to be anchored to a heart valve annulus in the annular operable geometry.
2. The annuloplasty device of claim 1 , wherein the plurality anchors in the deployed configuration are curved in an opposite direction from that of the radial plane of the tubular body member such that a transition from the introduction configuration to the deployed configuration increases a force of a superelastic property of the shape memory material to drive the plurality of anchors into tissue of a heart valve annulus.