At the end of anaesthesia after discontinuation of nitrous oxide and removal of endotracheal tube, 100% oxygen is administered to the patient to prevent –: (A) Diffusion Hypoxia, (B) Second gas effect, (C) Hyperoxia, (D) Bronchospasm
Answer is A. Diffusion hypoxia can be prevented by continuing 100% O2 inhalation for a few minutes after discontinuing N2O, instead of straight away switching over to air.