Patent ID: 8012157

Claim:
A medical device for determining a depth and a diameter of a medullary cavity of a bone comprising: an outer shaft having: a proximal end engaging an activation mechanism, a distal end having a first opening at an upper surface and a second opening at a lower surface, and a longitudinal axis between the proximal end and the distal end, wherein the longitudinal axis of the outer shaft includes a plurality of markers for determining the depth of the medullary cavity of the bone; an inner shaft having a proximal end engaging the activation mechanism, a distal end terminating in two sizing arms, and a longitudinal axis therebetween, wherein the two sizing arms are moveable through the first opening and the second opening of the distal end of the outer shaft from a retracted position in which the two sizing arms are located inside the outer shaft to an extended position in which the two sizing arms extend beyond the distal end of the outer shaft; and a diameter dimension readout reflecting a spaced apart distance between the two sizing arms when the two sizing arms are in the extended position for determining the diameter of the medullary cavity of the bone.