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  • Title: Pretreatment with dexmedetomidine or thiopental decreases myoclonus after etomidate: a randomized, double-blind controlled trial.
    Author: Mizrak A, Koruk S, Bilgi M, Kocamer B, Erkutlu I, Ganidagli S, Oner U.
    Journal: J Surg Res; 2010 Mar; 159(1):e11-6. PubMed ID: 20018300.
    Abstract:
    BACKGROUND: Myoclonic movements are common problems during induction of anesthesia with etomidate. The aim of this study was to compare the effect of pretreatment with dexmedetomidine (0.5 microg/kg) and thiopental (1 mg/kg) on the incidence of etomidate-induced myoclonus and postoperative pain. MATERIALS AND METHODS: A prospective double-blind study was conducted at a university hospital. Ninety patients (ASA physical status I-II) were randomly assigned to one of three groups: patients were pretreated with either dexmedetomidine (0.5 microg/kg), thiopental (1 mg/kg), or saline before induction of anesthesia with etomidate. One minute after the injection of study drugs, etomidate, 0.3 mg/kg was given. Myoclonus was assessed on a scale of 0 to 3. Recovery time, postoperative pain score, and hemodynamic variables were recorded during the intraoperative and postoperative period. Headache, nausea, vomiting, and coughing were noted during the study. RESULTS: The incidence and the intensity of myoclonus was significantly lower in the dexmedetomidine and thiopental groups (34%, 36%) than in the control group (64%) (P<0.05). The postoperative pain score at 30 min in the thiopental group was significantly higher than in the dexmedetomidine and control groups (63%) (P<0.05). CONCLUSIONS: We concluded that pretreatment with dexmedetomidine or thiopental is effective in reducing the incidence and severity of etomidate-induced myoclonic muscle movements and pretreatment with thiopental increases the postoperative pain.
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