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Haemodynamics during inhalation of a 50% nitrous‐oxide‐in‐oxygen mixture with and without hypovolaemia

Background: Inhalation of a gas mixture containing 50% nitrous oxide in oxygen (N2O/O2) is widely used for pain relief in emergency situations, which may also be associated with blood loss. The aim of this study was to evaluate the haemodynamic effects of this gas mixture in normo‐ and hypovolaemic subjects.