-Standard rapid sequence induction with pre-oxygenation by 100 % OXYGEN FOR 3 MINUTES FOLLOWED BY 4-5 mg/kg thiopental and 100 mg succinylcholine,cricoid pressure was applied once necessary.After correct placement of tracheal tube was confirmed,anaesthesia was maintained with up to 1.5% isoflurane and oxygen,neuromuscular blockade was maintained with 0.4 mg/kg atracurium.