Orthopedic clamp and extension rod

A method of extending a pre-existing spinal implant construct including an elongated rod attached to a portion of the spine, the method comprising:

• providing an extension clamp including a monolithic yoke having a first end and a second end, the first end comprising first and second rod engaging portions and a channel between the first and second rod engaging portions, the second end being spaced apart from the first end, and an extension rod extending from the second end of the yoke;
• positioning the extension rod substantially parallel to the elongated rod;
• connecting the extension clamp to the elongated rod by engaging the first and second rod engaging portions of the yoke with the elongated rod and securing first and second set screws extending through the first and second rod engaging portions, respectively, to the elongated rod;
• and
• attaching a fastener to another portion of the spine by positioning the fastener within the channel of the yoke between the first and second rod engaging portions.