title: Nitrous oxide/oxygen analgesia in emergency care.
abstract: A method of analgesia relatively new to North American emergency care involves the use of a homogeneous gas composed of 50% nitrous oxide and 50% oxygen (Entonox). The gas is administered by the patient, who holds the Entonox apparatus mask to his face and triggers gas flow by exerting negative inspiratory pressure (-1 cm. H(2)O). Worthwhile analgesia (i.e. marked or partial pain relief) was achieved in 95% of 110 emergency department patients experiencing significant pain from various sources.
authors.forename: K D
authors.initials: KD
authors.lastname: McKinnon
authors.forename: D
authors.initials: D
authors.lastname: Culver
authors.forename: J M
authors.initials: JM
authors.lastname: Prno