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Rocuronium (ROC) in a dose of 1 mg/kg has been advocated for rapid-sequence intubation, but the optimal dose for achieving intubation in one minute has not been verified in a comparative analysis. These investigators randomized 80 nonobese, healthy, elective anesthesia patients without anticipated difficult airways to receive 0, 0.4, 0.8, or 1.2 mg/kg of IV ROC after induction of anesthesia with midazolam, fentanyl, and propofol. One of the three investigators, all of whom were blind to the ROC dose, initiated intubation 40 seconds after ROC administration and graded intubating conditions according to predefined criteria as perfect, acceptable, or unacceptable. Failed intubation was defined as inability to intubate within 70 seconds after t…