The Surgeon’s Knot is created by making two throws rather than a single throw over the loop. The second loop has only one throw, which is placed in a square-knot fashion, leaving the free ends in the same plane as the first loop.
How to Tie a Surgeon’s Knot
First Half of the Knot:
Begin by tying a knot in the same way you tie your shoelaces as follows:
Take the left thread or bundle over the right thread bundle twice. Pull snug.
Second half of the knot:
Take the right thread or bundle over the left or complete a bow tie.