The Effect of Propofol and Remifentanil Sequence on ED50 and ED95 of Rocuronium in Rapid Sequence Induction Anesthesia

Propofol will be used in either two arms. The injection sequence will be changed. In propofol arm of the study, general anesthesia will be started with 2 mg/kg propofol administered within 15 seconds. And, then remifentanil will be given. In remifentanil arm of the study, 2 mg/kg propofol will be applied within 15 seconds following remifentanil injection.

Remifentanil will be used in either two arms. The injection sequence will be changed. In remifentanil arm, general anesthesia will be started with 2 μg/kg remifentanil administered within 30 seconds. And then propofol will be given. In propofol arm of the study the same dose will be applied within 30 seconds following propofol administration.

Rocuronium will be used for either two study arms. Rocuronium will be given in a 0.8 mg/kg dosage in the first study subject. And then, if the intubation condition is acceptable, the dose of the rocuronium will be decreased by 0.1 mg/kg for the next patient. Otherwise, if the intubation condition is not acceptable, the rocuronium dosage will be increased by 0.1 mg/kg for the next patient. This will be continue for ten crossover points (the point that turn from unsuccessful intubation to successful intubation).