How to Perform an Instrument Tie Surgeon's Knot

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There are two ways to tie suture knots and several types of suture knots. This instruction set focuses on how to perform a surgeon’s knot using an instrument tie. Instrument ties are ties for knots in sutures made with instruments and are typically used to close superficial lacerations (wound). This instruction set is intended for right handed users that are familiar with using a needle holder and know the proper way to load the needle holder with the needle. Novice users should consult the "Tips for Novice Users" section before beginning the procedure.

Part 1
Part 1 of 2:

Things to Be Aware Of

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  • How to hold a needle holder: Using the right hand, grasp the needle holder using the thumb and ring finger in the rings. The middle and little finger should rest on the outside of the ring that your ring finger is in. Extend the index finger and rest it on the hinge of the instrument.
  • How to close a needle holder: , squeeze your thumb and ring finger until a loud click is heard (first degree of tightness). There are a total of three degrees of tightness. With each click, the grasp of the jaws tighten.
  • How to open a needle holder: There are two ways to open the needle holder. Use the method that is most comfortable. Method 1: Use the middle of your thumb to push the ring away from your palm and use your middle, ring, and pinky finger to push the other ring towards your palm. Move the rings away from each other. Method 2: Place the left ring of the needle holder in palm. Hold down the left ring with your middle, ring, and little finger. Rest index finger of the shank of the needle holder. Use the palm area under your thumb to push the right ring away from your palm. Move the rings away from each other.
  • How to grasp the needle: Grasp the needle two thirds away from the tip of the needle and at the end of the jaws of the needle holder. The needle and needle holder should be perpendicular to each other. If repositioning is necessary use the forceps to hold the needle, not your hand. Be careful; the tip of the needle is sharp.
  • How to hold forceps: Hold the forceps with your thumb on one side and your index and middle finger on the other side.
Part 2
Part 2 of 2:

Tying the Surgeon's Knot

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  1. Hold the forceps with your left hand and lift the right skin edge.
  2. Hold the needle so that the tip of the needle is perpendicular to the skin. Penetrate the skin and turn wrist inward, following the curvature of the needle, to push the needle through the tissue until the tip of needle is seen in the middle of the wound. *CAUTION: Do not push the needle to close to the opening of the wound or too far away.
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  3. Release the needle and pick it up again at the tip of the needle. Pull until the entire needle is out on the right skin edge. [1]
  4. Use the forceps to hold the needle and then correctly reposition the needle in the needle holder. [2]
  5. Grasp the part of the left skin edge that is straight across the wound from where you first inserted the needle on the right side.
  6. Place the tip of the needle perpendicular to the inside of the wound. Penetrate the skin and turn the wrist inward, following the curvature of the needle, to push the needle through the tissue until the tip of needle is seen on the outer left side of the wound. *CAUTION: Do not push the needle to close to the opening of the wound or too far away.
  7. Release the needle and pick it up again at the tip of the needle. Pull until the entire needle is out on the left skin edge.
  8. Grasp the needle farthest away from the tip and release the needle from the needle holder *WARNING: Be careful; the tip of the needle is sharp.
  9. The suture thread pulled through is the long end of the suture thread which is now on the left side.
  10. The needle will not be used for the remainder of the procedure.
  11. [3] Do not make contact with the wound.
  12. Lift the part of the long strand, that is closer to the wound, up and over the instrument. [4] Loop the thread twice around the needle holder.
  13. Grab the short side of the thread as close to the end as possible. [5] More than one degree of tightness may be necessary, so that the suture material doesn't slip out of the jaws of the needle holder.
  14. When pulling the thread, cross your left hand over your right and pull so that the edges of the wound touch. Release the short end of the suture thread. Note that the short side of the thread is now on the left side and the long side of the thread is on the right side. *WARNING: Pulling too tight can cause tension in the skin or the suture could break. Not pulling tight enough will leave the wound open.
  15. Do not make contact with the wound.
  16. Lift the long strand up and over the instrument. [6] Loop the thread once around the needle holder.
  17. Grab the short side of the thread as close to the end as possible. More than one degree of tightness may be necessary, so that the suture material doesn't slip out of the jaws of the needle holder.
  18. When pulling the thread, cross your left hand over your right and pull so that the edges of the wound touch. Release the short end of the suture thread. Note that the short side of the thread is now on the right side and the long side of the thread is on the left side.
  19. Do not make contact with the wound. [7]
  20. Lift the long strand up and over the instrument. Loop the thread once around the needle holder.
  21. Grab the short side of the thread as close to the end as possible. More than one degree of tightness may be necessary, so that the suture material doesn't slip out of the jaws of the needle holder.
  22. When pulling the thread, cross your left hand over your right and pull so that the edges of the wound touch. Note that the short side of the thread is now on the left side and the long side of the thread is on the right side.
  23. Pick up both the long and short ends of the thread in one hand. Cut the threads evenly and close to the knot. *Caution: Be careful not to cut too close to the knot or it might come undone.
  24. Grasp the needle with the needle holder and drop it in the sharps container.
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      Tips

      • What if the suture is too tight? If the suture is too tight, cut the suture, take it out, and repeat the entire procedure. When making the knots, tighten until the two skin edges are touching.
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      • What if the suture is too loose? If the suture is too loose, cut the suture, take it out, and repeat the entire procedure. When making the knots, tighten until the two skin edges are touching.
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      • Is "silk, non-absorbable suture 2" the only material to be used for all suturing? The suture material and size of the needle is decided based on the location of the suture. Silk, non-absorbable suture 2-0 is used in this instruction set so that the needle and suture thread are clearly visible in pictures.
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      Warnings

      • The suture pad may slip during the procedure.The user my need to support it with the other hand.
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      • When clamping the needle with the needle holder, only clamp it to the first degree of tightness (until one click is heard). Any tighter will flatten the needle and may dent the jaws of the needle holder
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      • In this procedure, you will be working with sharps (needle). Avoid contact with the sharp end of the needle.
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      • Inexperienced users might feel discomfort while using the needle holder.
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      • Do not dispose of the needle in a regular trash can. Dispose in a sharps container.
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      Things You'll Need

      • Needle holder
      • Suture scissors
      • Forceps
      • Suture pad (the straight wound is used in this procedure)
      • Suture material (needle and thread): silk, non-absorbable suture 2-0
      • Access to a sharps container

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      References

      1. ↑ https://5minuteconsult.com/collectioncontent/30-156300/procedures/basic-instrument-suture-tie
      2. ↑ https://wcvm.usask.ca/vsac205/Lab2/how-to-tie-knots.php#InstrumentTies
      3. ↑ https://www.youtube.com/watch?v=eh74OqUwMz4
      4. ↑ https://www.youtube.com/watch?v=eh74OqUwMz4
      5. ↑ https://www.youtube.com/watch?v=eh74OqUwMz4
      6. ↑ https://www.youtube.com/watch?v=eh74OqUwMz4
      7. ↑ https://www.youtube.com/watch?v=eh74OqUwMz4

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