Tying the tracheal tube

After intubation it is critical to securely fasten the tracheal tube so it does not dislodge during transfer. Dedicated devices are available for this although mostly cloth tape is used.
Different knots have been compared although not found be significantly different in terms of security1. One favoured knot, which is easy to learn and to teach, is the lark’s head (also called cow’s hitch)2.
The tape is folded in half so there is a loop at one end and two free ends at the other. The loop is wrapped around the tube and the two free ends are fed through the loop, and then taped around the patient’s head. It has been suggested that this results in the tape gripping the tube over the widest possible area, thereby reducing the potential for slippage and displacement.

larks head knot
larks head knot

1.The insecure airway: a comparison of knots and commercial devices for securing endotracheal tubes
BMC Emerg Med. 2006 May 24;6:7 Open Access
2. A knotty problem resolved
Anaesthesia. 2007 Jun;62(6):637

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