A Multicenter Evaluation of Total Intravenous Anesthesia with Remifentanil and Propofol for Elective Inpatient Surgery


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Abstract

Remifentanil is a mu-opioid receptor agonist with a context sensitive half-time of 3 min and an elimination half-life -1 centered dot min-1) or large dose (1 micro gram centered dot kg-1 centered dot min-1). Propofol (0.5-1.0 mg/kg IV bolus and 75 micro gram centered dot kg-1 centered dot min-1 infusion) and vecuronium were also given. Remifentanil infusions were decreased by 50% after tracheal intubation. End points included responses (hypertension, tachycardia, and somatic responses) to tracheal intubation and surgery. More patients in the small-dose than in the large-dose group responded to tracheal intubation with hypertension and/or tachycardia (25% vs 6%; P = 0.003) but there were no other differences between groups in intraoperative responses. Recovery from anesthesia was within 3-7 min in both groups. The most frequent adverse events were hypotension (systolic blood pressure [BP] < 80 mm Hg or mean BP < 60 mm Hg) during anesthesia induction (10% small-dose versus 15% large-dose group; P = not significant [NS]) and hypotension (27% small-dose versus 30% large-dose group; P = NS), and bradycardia (7% small-dose versus 19% large-dose group; P = NS) during maintenance. In conclusion, when combined with propofol 75 micro gram centered dot kg-1 centered dot min-1, remifentanil 1 micro gram/kg IV as a bolus followed by an infusion of 1.0 micro gram centered dot kg-1 centered dot min-1 effectively controls responses to tracheal intubation. After tracheal intubation, remifentanil 0.25-4.0 micro gram centered dot kg-1 centered dot min-1 effectively controlled intraoperative responses while allowing for rapid emergence from anesthesia.(Anesth Analg 1996;83:279-85)

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