• Lars Hüter, Torsten Schreiber, Michael Gugel, and Konrad Schwarzkopf.
• Klinik für Anästhesiologie und Intensivtherapie, Friedrich-Schiller-Universität Jena, Germany. lars.hueter@med.uni-jena.de
• Anesth. Analg. 2007 Nov 1;105(5):1298-302, table of contents.

BackgroundMyoclonic movements are a common problem in unpremedicated patients during induction of anesthesia with etomidate.MethodsIn a double-blind fashion, 40 patients (ASA physical status III-IV) scheduled for elective cardioversion were randomly assigned to receive either 0.015 mg/kg midazolam or placebo 90 s before the injection of 0.3 mg/kg etomidate. Myoclonic movements and sedation were recorded on a scale between 0 and 3. Pulse oximetry, noninvasive arterial blood pressure, and heart rate were recorded during the study period.ResultsTwo patients (10%) in the midazolam group had myoclonic movements after the administration of etomidate, whereas 10 of the 20 patients (50%) receiving placebo experienced such movements (P = 0.006). No other differences were found between the groups; in particular, there was no difference in recovery 5 min after the administration of etomidate.ConclusionsIV midazolam 0.015 mg/kg administered 90 s before induction of anesthesia with etomidate is effective in reducing myoclonic movements and does not prolong recovery in unpremedicated patients after short procedures.

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