Instrumental Knot ( surgeon’s traditional knot) :
1. Place instrument over the inner surface of extended white strand.
2. Encircle instrument with white strand.
3. Grasp blue strand with instrument.
4. Pull both threads in opposite directions so that white strand pulls away and instrument pulls towards operator.
5. Place instrument again over the inner surface of extended white strand.
6. Encircle instrument with white strand.
7. Grasp blue strand with instrument.
8. Pass blue strand through the loop formed by white strand.
9. Pull blue strand away and white strand towards operator. A square knot should be obtained.