• Br J Anaesth · Apr 1998

    Randomized Controlled Trial Multicenter Study Clinical Trial

    Remifentanil in combination with propofol for spontaneous ventilation anaesthesia.

    • J E Peacock, J B Luntley, B O'Connor, C S Reilly, T W Ogg, B J Watson, and S Shaikh.
    • Department of Surgical and Anaesthetic Sciences, Royal Hallamshire Hospital, Sheffield.
    • Br J Anaesth. 1998 Apr 1;80(4):509-11.

    AbstractWe have investigated the effect of four doses of remifentanil on the incidence of respiratory depression and somatic response at incision. Remifentanil was administered as a loading dose of 0.125, 0.25, 0.375 or 0.5 microgram kg-1 and at a maintenance infusion rate of 0.025, 0.05, 0.075 or 0.1 microgram kg-1 min-1, respectively, with an infusion of propofol 6 mg kg-1 h-1. Responses occurred in 88% of patients with remifentanil 0.025 microgram kg-1 min-1 compared with 30-40% in the other groups. Respiratory depression after incision increased from 6% with remifentanil 0.025 microgram kg-1 min-1 to 73% with 0.1 microgram kg-1 min-1. Increases in propofol infusion rate to 7.2-8.4 mg kg-1 h-1 produced adequate maintenance of anaesthesia. Reductions in remifentanil doses to 0.025-0.05 microgram kg-1 min-1 resulted in adequate respiration at the end of surgery in 88% of patients. Maintenance infusions of the two drugs for spontaneous ventilation are likely to be in these ranges. However, the ideal loading doses and infusion rates for induction remain to be established.

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