Dynamic annuloplasty ring sizer

摘要

A dynamic, adjustable annuloplasty ring sizer can include an adjustable ring replica, which can be adjusted through a range of sizes corresponding to available prosthetic annuloplasty repair ring sizes. Actuation of an adjustment trigger on a handle portion of the ring sizer can displace tension wires that extend through a malleable shaft and through a plurality of articulating segments that form the ring replica. Displacement of the tension wires causes flexion of the joints between adjacent articulating segments, thereby reducing the overall size of the ring replica. Releasing the tension wires can allow an elastic extension wire to act on the ring replica, enlarging the ring replica to its maximum, at-rest size. In this manner, the appropriate size of annuloplasty ring prosthesis can be determined with a single device, without requiring a plurality of static ring sizers that require individual insertion and placement for the conventional trial-and-error sizing methods.

主权项

1. A device for sizing a heart valve annulus, comprising:
a proximal handle having an actuator; a shaft coupled to and extending in a distal direction from the handle; an annuloplasty ring replica coupled to a distal end of the shaft configured to be adjusted to a plurality of different sizes, the annuloplasty ring replica being elongated and defining a shape of the annulus being sized and being biased to a maximum size; and at least one elongated member coupled to the actuator in the handle and extending along the shaft to the annuloplasty ring replica, the elongated member being configured, when actuated, to reduce the size of the annuloplasty ring replica to a plurality of different sizes smaller than the maximum size.