Purpose The shortest time to tracheal intubation, the best intubating conditions, and the shortest duration of muscle paralysis are achieved with succinylcholine. During a lidocaine-remifentanil-propofol induction of anesthesia, we compared intubating conditions 90 s after administering low-dose rocuronium (0.3 mg Á kg -1 ) with intubating conditions 60 s after administering succinylcholine 1.5 mg Á kg -1 . Methods The randomized double-blind study included 184 healthy adult patients scheduled for elective surgery. Anesthesia was induced in all patients with lidocaine 1.5 mg Á kg -1 , remifentanil 2 lg Á kg -1 , and propofol 2 mg Á kg -1 administered over 30 s. In one group, rocuronium 0.3 mg Á kg -1 was administered before the induction sequence, and in the other group, succinylcholine 1.5 mg Á kg -1 was administered after the induction sequence. Laryngoscopy was attempted 90 s after rocuronium administration and 60 s after succinylcholine administration. Intubating conditions were assessed as excellent, good, or poor on the basis of ease of laryngoscopy, position of the vocal cords, and reaction to insertion of the tracheal tube and cuff inflation. Results There were 92 patients per group. In the rocuronium group, intubating conditions were excellent in 83 patients (90%), good in 8 (9%), and poor in 1 (1%), not significantly different from the intubating conditions in the succinylcholine group, which were excellent in 88 patients (96%), good in 3 (3%), and poor in 1 (1%) (P = 0.3). Conclusion During a lidocaine-remifentanil-propofol induction of anesthesia, rocuronium 0.3 mg Á kg -1 administered before the induction sequence provides intubating conditions comparable to those achieved with succinylcholine 1.5 mg Á kg -1 administered after the induction sequence.
RésuméObjectif La succinylcholine permet de re´aliser l'intubation trache´ale dans les plus courts de´lais, avec les meilleures conditions d'intubation et la dure´e la plus courte de paralysie musculaire. Au cours d'une induction de l'anesthe´sie avec lidocaı¨ne-re´mifentanil-propofol, nous avons compare´les conditions d'intubation 90 sec apre`s avoir administre´du rocuronium a`faible dose (0,3 mgÁkg -1 ) aux conditions d'intubation 60 sec apre`s avoir administre´de la succinylcholine a`1,5 mgÁkg -1 . Méthode Au total, 184 patients adultes sains devant subir une chirurgie non urgente ont pris part a`cette e´tude randomise´e en double aveugle. L'anesthe´sie a e´te´induite chez tous les patients avec de la lidocaı¨ne (1,5 mgÁkg -1 ), du re´mifentanil (2 lgÁkg -1 ) et du propofol (2 mgÁkg -1 ) administre´s sur une pe´riode de 30 sec. Dans un groupe, du rocuronium (0,3 mgÁkg -1 ) a éte´administre´avant la