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Surgical Slip Tie

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Tying the Surgical Slip Tie ()
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Tying the Surgical Slip Tie

With the short end away from you. Hook your index finger between the ends. Grip the end with your thumb and push it through. Slide the knot down against the vessel. Next, hook your thumb between the ends. Grip the end with your finger, push it through, Slide the knot down. Pull on the short end to invert the knot.

Surgical Slip Tie

Uses: The Surgical Slip Tie provides a method of pushing half hitches down into a wound. In practice the knot is often pushed down using a finger.

Techniques: There are many variations. The animation shows two alternating half hitches being slid down one at a time and then inverted to tie a Square (Reef) Knot. This is not entirely trustworthy; it is too easy to continue the inversion beyond the Square Knot to finish with two half hitches around the other end.

The Half Hitches may be slid down separately or slid down together. Quite commonly two identical Half Hitches are slid down, which if manipulated would tie a Granny. However, the two Half Hitches are usually tightened in place and then followed by alternating Half Knots to add a Square Knot for security. Ashley provides this wonderful account (ABOK # 462, p 75):

  • Dr. C. W. Mayo, of the Mayo Clinic, Rochester, Minnesota, has written me that he uses the accompanying knot in tying a cystic duct, and also on all large blood vessels when ligature is necessary. Two identical HALF KNOTS are first tied, forming a GRANNY KNOT. This admits of a slight adjustment after the knot has been tied. When the tension has been adjusted, a third and opposite HALF KNOT is added, which locks the whole knot. The second and third HALF KNOTS, if considered as a unit, form a SQUARE KNOT.

Learning and Teaching: Most right-handed students will prefer the Normal view and left-handed students the Mirror view. An Instructor sitting opposite a student may find it helpful to use the Inverted or Rotated views.

Disclaimer: Any activity that involves ropes is potentially hazardous. Lives may be at risk - possibly your own. Considerable attention and effort have been made to ensure that these descriptions are accurate. However, many critical factors cannot be controlled, including: the choice of materials; the age, size, and condition of ropes; and the accuracy with which these descriptions have been followed. No responsibility is accepted for incidents arising from the use of this material.

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May 21, 2017
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