• J Clin Anesth · Feb 1995

    Randomized Controlled Trial Comparative Study Clinical Trial

    Pharmacodynamics of rocuronium with and without prior administration of succinylcholine.

    • M Y Dubois, D E Lea, B Kataria, P L Gadde, D Q Tran, and T Shearrow.
    • Department of Anesthesia, Georgetown University Medical Center, Washington, D.C., USA.
    • J Clin Anesth. 1995 Feb 1; 7 (1): 44-8.

    Study ObjectivesTo compare succinylcholine (S) and rocuronium (R) used for endotracheal intubation, and to assess the possible action of S on subsequently administered R.DesignDouble-blind, randomized, phase III study.SettingUniversity Medical Center.Patients24 ASA physical status I and II patients, ages 28 to 65, undergoing general anesthesia for abdominal procedures.InterventionDouble-blind administration of R 600 mcg/kg (Group A) or S 1 mg/kg was achieved with open label R 150 mcg/kg. Standardized general anesthetic technique with sodium thiopental, fentanyl, and nitrous oxide in oxygen was administered.Measurements And Main ResultsNeuromuscular junction was tested by ulnar nerve stimulation and mechanomyograph. Intubation was attempted at 80% first twitch depression of train-of-four. Heart rate and blood pressure were recorded throughout. Onset times were 74 +/- 37 seconds for S and 130 +/- 46 seconds for R. Intubation times were 76 +/- 29 seconds for S and 85 +/- 23 seconds for R (no significant difference). Good to excellent intubation conditions were achieved in both groups. S given prior to R decreased onset time and increased duration of R, when compared with R given alone. No drug related cardiovascular events were noted.ConclusionRapid intubation conditions can be obtained after both S and R. Given its overall safety profile, R can be used when S is contraindicated, or in healthy patients with no apparent difficult airway, when procedures are expected to last more than 25 minutes.

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