In this section
& Sedation Guideline
Nitrous oxide has been used for many years in obstetric care
during labour. It has both analgesia and amnestic properties. It
has a quick onset of action and fast offset which makes it ideal
for use in an emergency department. It has no sedative properties
and thus must be used on patients who are co-operative (i.e.
>4yrs of age).
It comes as a pre-mixed 50:50 combination of nitrous oxide and
oxygen on a demand triggered system, or as a continuous flow via a
mixer (maximum concentration is 70% NO:30% O2).