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  • Title: Intraocular pressure changes during rapid sequence induction and intubation: a comparison of rocuronium, atracurium, and succinylcholine.
    Author: Vinik HR.
    Journal: J Clin Anesth; 1999 Mar; 11(2):95-100. PubMed ID: 10386278.
    Abstract:
    STUDY OBJECTIVE: To compare changes in intraocular pressure (IOP) during rapid sequence induction and intubation following rocuronium, succinylcholine, and atracurium. DESIGN: Open-label, prospective, randomized study. SETTING: Operating room at the Eye Foundation Hospital (University of Alabama at Birmingham) PATIENTS: 45 ASA physical status I, II, and III patients, aged 18 to 65 years, scheduled for elective eye surgery with general anesthesia. INTERVENTIONS: Anesthesia was rapidly induced in unpremedicated patients with a fixed combination of midazolam 0.025 mg/kg, alfentanil 0.025 mg/kg, and propofol 1.5 mg/kg. Intubation was performed, as clinically indicated, approximately 60 seconds following administration of rocuronium 0.6 mg/kg, atracurium 0.5 mg/kg, or succinylcholine 1 to 1.5 mg/kg. MEASUREMENTS AND MAIN RESULTS: Intraocular pressure was measured before induction of anesthesia (baseline), following anesthesia induction and administration of muscle relaxant (before intubation), and after intubation. The percent change in IOP from baseline was significantly decreased in the rocuronium group compared with the succinylcholine group (p = 0.046) before intubation. This trend continued after intubation, but the difference was no longer significant (p = 0.070). Intubation scores for rocuronium and succinylcholine groups were similar, and both scores were superior to that for the atracurium group (p = 0.002). CONCLUSION: Intraocular pressure can be controlled during emergency induction of anesthesia and intubation with adequate depth of anesthesia and muscle relaxation. Rocuronium, succinylcholine, and atracurium all provided sufficient muscle relaxation to achieve successful intubation and no increase in IOP. However, rocuronium 0.6 mg/kg provided significantly better intubating conditions compared with atracurium, and it resulted in a significantly greater decrease in IOP compared with baseline than succinylcholine.
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