Apparatus and method for identification and measurement of intramedullary length

An intramedullary reaming instrument, the instrument comprising:

• an adapter interface adapted to receive a handle or couple to a power head;
• an elongate shaft coupled to a distal end of the adapter interface and extending along a longitudinal axis of the instrument;
• a reaming tip coupled to a distal end of the elongate shaft;
• and
• a removable intramedullary canal measurement device comprising:
• an elongate body extending from a first end to a second end along the longitudinal axis when attached to the instrument;
• an adapter clip extending from the first end configured to secure the measurement device to the adapter interface;
• and
• a plurality of measurement clips including at least three measurement clips distributed along the elongate body at predetermined distances from the reaming tip when the measurement device is secured to the instrument, each measurement clip of the plurality of measurement clips configured to engage a shaft of the instrument,
• wherein the adapter interface includes a locking collar disposed around a distal end of the adapter interface and configured to secure the adapter clip of the measurement device;
• and
• wherein the locking collar is a cylinder including an inner circumferential lip to receive a bias member configured to bias the locking collar into position over the adapter clip.