• B Walder, A Borgeat, P M Suter, and J A Romand.
• Surgical Intensive Care Division, Department APSIC, University Hospitals of Geneva, Switzerland.
• Anaesth Intensive Care. 2002 Apr 1;30(2):171-8.

AbstractThe aim was to compare the efficacy and side-effects of propofol combined with a constant, low dose of midazolam versus propofol alone for sedation. In a prospective, randomized and double-blinded study, 60 male patients scheduled for elective coronary bypass grafting were enrolled. Postoperatively, patients were stratified to receive either a continuous intravenous infusion of midazolam 1 mg/h or placebo. Target Ramsay sedation score was 3 to 5 corresponding to conscious sedation. An intention-to-treat design for propofol was performed to reach target sedation. Efficacy of sedation was statistically significantly higher in the group midazolam + intention-to-treat with propofol compared with the group placebo + intention-to-treat with propofol (91% vs 79%; P=0.0005). Nine of 27 patients in the midazolam group (33.4%) and nine of 26 patients in the placebo group (34.6%) needed no supplementary propofol. Weaning time from mechanical ventilation was longer in the midazolam group whether or not they required supplemental propofol when compared with placebo group (all: 432 +/- 218 min vs 319 +/- 223 min; P=0.04; supplementary propofol: 424 +/- 234 min vs 265 +/- 175 min; P=0.03). The cumulative number of patients remaining intubated was significantly higher in the group midazolam + propofol compared with the group placebo + propofol (P=0.03). In conclusion, target sedation is reached slightly more often by the co-administration of propofol and a low dose of midazolam, but weaning time from mechanical ventilation is prolonged by the co-administration of propofol and a low dose of midazolam.

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