Intravenous lidocaine does not affect the anesthetic depth during rapid sequence induction and intubation as assessed by Bispectral Index monitoring: A randomized double blind study

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Abstract

Introduction: We investigated the impact of intravenous lidocaine on anesthetic depth, as assessed by Bispectral Index score (BIS), and hemodynamic responses to rapid sequence induction/intubation. Material and methods: Eighty-four surgical patients with risk factors for regurgitation/ aspiration were randomized to receive either lidocaine 1.5 mg/kg or normal saline in a double-blind fashion. Propofol 2 mg/kg, lidocaine or normal saline, followed by rocuronium 1 mg/kg were administered intravenously and trachea was intubated under cricoid pressure application. The BIS scores were recorded before induction of anesthesia, immediately after, at 30 s and 1 min after rocuronium injection and every 30 s after intubation, for 10 min. Systolic/ diastolic blood pressure and heart rate were measured before induction, immediately after and at 1 min following rocuronium administration, and every minute for 10 min after intubation. Results: Data from 78 patients were analyzed. Demograpic characteristics did not differ between the study groups. A total of 24 BIS scores were recorded for each patient. No difference was found in BIS values between lidocaine and control groups at any time point (F = 2.936, p = 0.91). Also no difference was detected in heart rate, systolic and diastolic blood pressure at any time point of the study period between the two groups (F = 0.063, p = 0.80, F = 0.007, p = 0.93, F = 0.435, p = 0.51 respectively). No episodes of significant bradycardia occurred and none of the patients reported awareness/recall of the procedure. Conclusions: Lidocaine 1.5 mg/kg given intravenously during rapid sequence induction does not affect BIS values, or blunt the hemodymanic response to laryngoscopy and intubation. Copyright © 2013 Termedia & Banach.

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Staikou, C., Paraskeva, A., Karmaniolou, I., Vezakis, A., & Tsaroucha, A. (2013). Intravenous lidocaine does not affect the anesthetic depth during rapid sequence induction and intubation as assessed by Bispectral Index monitoring: A randomized double blind study. Archives of Medical Science, 9(4), 713–718. https://doi.org/10.5114/aoms.2013.36898

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