Patent ID: 7270666

Claim:
A method of forming a transverse bone hole to intersect a main graft tunnel for inserting a transverse fixation member to secure a graft in the tunnel, the method comprising: forming a graft tunnel in the bone; mounting a transverse tunnel drill guide by placing a first leg of the drill guide inside the graft tunnel and positioning a second leg outside of the bone, the second leg having a transverse drill sleeve directed transverse to the graft tunnel; mounting a cannula on the drill sleeve in sliding relationship; guiding a drill bit with the drill sleeve to form a transverse bone hole intersecting the graft tunnel; and advancing the cannula into engagement with the transverse bone hole to maintain access to the transverse bone hole upon removal of the drill guide, wherein the cannula includes an expandable portion having a first collapsed diameter and a second expanded diameter larger than the collapsed diameter, the method further comprising: expanding the cannula to the second expanded diameter by sliding the cannula onto the drill sleeve; and withdrawing the drill bit from the drill sleeve while simultaneously sliding the cannula along the drill sleeve and into the transverse bone hole so that the expanding portion collapses to the first collapsed diameter and engages the transverse bone hole.