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Knot Tying

Tie secure surgical knots with controlled tension and clean instrument handling.

This skill is coming soon.

Its trainer scene is not available yet (JIGSAWS). Try Needle Passing or Peg Transfer to use the trainer.

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What you'll practice

  1. 1LoopWrap the suture around the needle driver to form the first throw.
  2. 2GraspWith the wrapped instrument, grasp the short free end of the suture.
  3. 3CinchDraw the first throw down flat with even tension from both hands.
  4. 4ReverseWrap the opposite way to lay the second throw against the first.
  5. 5SquareSeat the second throw square so the knot locks and does not slip.
  6. 6CompleteKnot tied square and secure with controlled tension.

How it will be scored

  • Bimanual coordination
  • Pinch stability
  • Grip timing
  • Movement smoothness
  • Path similarity
  • Correction efficiency

Highlighted areas carry extra weight in this skill's score.

Coaching focus

  • Throw tension symmetry
  • Square knot seating
  • Bimanual wrap coordination

Expert motion derived from JIGSAWS (Knot_Tying_E003, expert, GRS 22) for academic, non-commercial use. Gao et al. 2014, The JHU-ISI Gesture and Skill Assessment Working Set (JIGSAWS).