Surgical knots and knot tying

Question 1

Square knot

Answer 1

2 simple throws; most common knot in surgery.

Question 2

Surgeon’s knot

Answer 2

surgeon’s throw + simple throw; higher knot friction = greater knot security BUT it is bulky.

Question 3

Slip knot

Answer 3

applying uneven tension to both strands or pulling up when tightening; used for deep cavities or tight spaces.

Question 4

Main knot tying principles

Answer 4

1. Always apply even tension to both strands except slip knot.
2. Always secure with additional 2 simple throws min.
3. Avoid excessive tightening.

Question 5

Hand ties

Answer 5

used in confined spaces BUT uses more suture material than instrument ties.

Question 6

Instrument ties

Answer 6

use needle holders to create and tighten knot.