Systems and methods for performing spine surgery
A mechanical rod bender is provided for correcting a curvature or deformity in a patient's spine based on the digitized locations of implanted screws and tracking the placement of the rod as it is placed in a minimally invasive fashion. The mechanical rod bender includes a fixed die and a movable die, the movable die having multiple rod contact channels to accommodate spinal rods of different sizes.
1. A device for effecting at least one bend in a spinal rod, comprising:
a fixed die having a first spinal rod contacting surface;
a moving die having a first rod channel including a second spinal rod contacting surface and a second rod channel including a third spinal rod contacting surface, the first rod channel sized to accommodate a portion of a first spinal rod having a first diameter, the second rod channel sized to accommodate a portion of a second spinal rod having a second diameter that is different than the first diameter, the moving die spaced apart from the fixed die to receive the first spinal rod or the second spinal rod between the fixed die and moving die;
an actuation switch coupled to the moving die, wherein the actuation switch comprises a first button and a second button, wherein the first button and the second button are positioned on opposite sides of the moveable die along an axis, wherein depression of the first button or the second button enables a translation of the moving die along the axis between (i) a first position in which the second spinal rod contacting surface is in alignment with the first spinal rod contacting surface and (ii) a second position in which the third spinal rod contact surface is in alignment with the first spinal rod contacting surface;
an elongated base member supporting the fixed die;
a housing member supporting the moving die and pivotably engaged to the elongated base member; and
an elongated pivot member pivotably engaged to the elongated base member and releasably engageable to the housing member to pivot the moving die relative to the fixed die to impart a bend to the spinal rod upon pivoting of the moving die.
2. The device of claim 1 , further including an angle gauge positioned on the housing member, the housing member configured for initially supporting the elongated pivot member relative to the elongated base member in one of a plurality of pre-determined angular positions, wherein the one of the plurality of pre-determined angular positions is determined according to the angle gauge.
3. The device of claim 2 , wherein the angle gauge includes a plurality of ratchet teeth.
4. The device of claim 3 , wherein the elongated pivot member is releasably engageable to the housing member by interacting with the ratchet teeth of the angle gauge.
5. The device of claim 1 , further comprising a clamp member mounted to the elongated base member and configured to engage the spinal rod with the rod in position between the fixed and moving dies.
6. The device of claim 5 , wherein the clamp member is translatable along at least a portion of the length of the elongated base.
7. The device of claim 5 , wherein the clamp member includes a knob configured to rotate the clamp about a longitudinal axis of the spinal rod to a pre-determined angular orientation.