HEART VALVE CLIP
A valve repair device, e.g., for treating mitral valve regurgitation, includes a tubular body defining a longitudinal axis, paddles supported by the tubular body and movable to change abduction of the paddles relative to the longitudinal axis, and retention members supported by the tubular body proximal the paddles and similarly movable to change abduction of the retention members relative to the longitudinal axis to facilitate capture of native valve leaflets between pairs of paddles and retention members. Movement of the paddles and/or retention members is provided by one or more control mechanisms including a collar a shaft extending within the tubular body. Each shaft is threadedly engaged to a respective collar and coupled to one or more of the movable elements such that, when the collar is rotated, the shaft translates to change abduction of the movable element relative to the longitudinal axis.
1 . A method of treating a valvular disorder comprising:
positioning a valve repair device across a valve annulus of a cardiac valve using a delivery system, the valve repair device including:
a tubular body defining a longitudinal axis and supporting a rotatable collar;
a paddle supported by the tubular body; and
a retention member supported by the tubular body proximal the paddle;
deploying the paddle on a ventricular side of a leaflet of the cardiac valve;
deploying the retention member on an atrial side of the leaflet to capture the leaflet between the paddle and the retention member, wherein deploying one of the paddle and the retention member comprises rotating the rotatable collar.
2 . The method of claim 1 , wherein the rotatable collar is threadably engaged with a shaft coupled to the one of the paddle and the retention member and rotating the rotatable collar linearly translates the shaft.
3 . The method of claim 1 , wherein deploying the paddle includes abducting the paddle relative to the longitudinal axis.
4 . The method of claim 1 , wherein deploying the retention member includes abducting the paddle relative to the longitudinal axis.
5 . The method of claim 1 , wherein:
the rotatable collar is a first rotatable collar,
rotating the first rotatable collar deploys the paddle,
the tubular body supports a second rotatable collar that is independently rotatable from the rotatable collar, and
deploying the retention member comprises rotating the second rotatable collar.
6 . The method of claim 5 , wherein the rotatable collar is concentric with the second rotatable collar.
7 . The method of claim 5 , wherein:
the first rotatable collar is threadably engaged with a first shaft coupled to the paddle,
rotating the first rotatable collar linearly translates the first shaft to deploy the paddle,
the second rotatable collar is threadably engaged with a second shaft coupled to the retention member, and
rotating the second rotatable collar linearly translates the second shaft to deploy the retention member.
8 . The method of claim 7 , wherein the first shaft is concentric with the second shaft.
9 . The method of claim 1 , wherein:
the paddle is a first paddle,
the retention member is a first retention member,
the valve repair device further includes each of a second paddle and a second retention member, and
the method further comprises:
deploying the second paddle on a ventricular side of a second leaflet of the cardiac valve, and
deploying the second retention member on an atrial side of the second leaflet, thereby capturing the second leaflet between the second paddle and the second retention member.
10 . The method of claim 9 , wherein rotating the rotatable collar simultaneously deploys the first paddle and the second paddle.
11 . The method of claim 9 , wherein:
the rotatable collar is a first rotatable collar,
rotating the first rotatable collar deploys the first paddle,
the tubular body supports a second rotatable collar that is independently rotatable from the first rotatable collar, and
deploying the second paddle comprises rotating the second rotatable collar.
12 . The method of claim 11 , wherein the first rotatable collar is concentric with the second rotatable collar.
13 . The method of claim 9 , wherein rotating the rotatable collar simultaneously deploys the first retention member and the second retention member.
14 . The method of claim 9 , wherein:
the rotatable collar is a first rotatable collar,
rotating the rotatable collar deploys the first retention member,
the tubular body supports a second rotatable collar independently rotatable from the first rotatable collar, and
deploying the second retention member comprises rotating the second rotatable collar.
15 . The method of claim 14 , wherein the first rotatable collar is concentric with the second rotatable collar.
16 . The method of claim 1 , wherein the retention member includes a distal face including a surface feature extending from the distal face and configured to engage the leaflet.
17 . The method of claim 1 , further comprising decoupling the valve repair device from the delivery system.
18 . The method of claim 17 , wherein, during delivery, the valve repair device is coupled to the delivery system by a tether and decoupling the valve repair device from the delivery system includes releasing the tether.
19 . The method of claim 1 further comprising navigating the delivery system along a transfemoral route to deliver the valve repair device to the cardiac valve.
20 . The method of claim 1 , wherein the delivery system includes a movable sheath and the method further comprises unsheathing the valve repair device prior to deploying the paddle.