Page 47 - Arthroscopic Knot Tying: An Instruction Manual

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Roeder Knot

The Roeder knot (27 ) is a sliding knot that is a variation of the Duncan loop. It was originally used in
tonsillectomy surgery and described in the German literature by Röder in 1918 (30 ). There have been
several modifications of the knot that have been described since the initial description of the knot.
Modifications of the Roeder knot are currently used in both laparoscopic and arthroscopic surgery
(23 ,27 ,32 ,33 ).

Roeder Knot (Fig. 24)

FIGURE 24. A-G. Roeder knot.

 The post limb should be one half the length of the loop limb.
 Throw the first loop around the post limb and then hold the loop and post together with the thumb
and index finger of the non-dominant hand (Fig. 24A ).
 Throw a second loop around both the post and loop limbs (Fig. 24B ).
 Throw a third loop around only the post limb and between the post and loop (Fig. 24C ).
 Pass the tail of the loop between the second and third turns and in between the loop limb and the
post limb (Fig. 24D ).
 Tension the knot by gently pulling on both the post and the loop limbs simultaneously (Fig. 24E ).
 While pulling on the post limb, push the knot into the joint with the knot pusher on the post strand
(Fig. 24F ).
 Lock the knot with a series of three alternating half hitches with post switching (Fig. 24G ).
o Throw an underhand loop on the original post. Tension with the knot pusher.
o Switch posts.
o Throw an overhand loop over the new post. Tension with the knot pusher.
o Switch posts.
o Throw an underhand loop on the original post again. Tension with the knot pusher.

The Roeder knot was shown to be inferior to the Duncan loop and the Snyder knot in load to clinical
failure trials but a statistical significance was not found (26 ).