JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

Effect of remifentanil on the haemodynamic response to orotracheal intubation

J P Thompson, A P Hall, J Russell, B Cagney, D J Rowbotham
British Journal of Anaesthesia 1998, 80 (4): 467-9
9640152
We have examined the effect of remifentanil on the haemodynamic response to orotracheal intubation in a randomized, double-blind study. We studied 40 patients allocated to one of four groups of 10 each, to receive the following immediately before induction of anaesthesia: remifentanil 1 microgram kg-1 bolus over 30 s, followed by an infusion of 0.5 microgram kg-1 min-1; saline placebo only; glycopyrrolate 200 micrograms and remifentanil 1 microgram kg-1 bolus over 30 s, followed by an infusion of 0.5 microgram kg-1 min-1; or glycopyrrolate 200 micrograms only. Anaesthesia was induced with propofol, vecuronium and 1% isoflurane with 66% nitrous oxide in oxygen. The trachea was intubated under direct laryngoscopy 3 min after induction of anaesthesia. Arterial pressure and heart rate were measured non-invasively, immediately before induction of anaesthesia and then at 1-min intervals. Remifentanil was found to effectively attenuate the pressor response to intubation (P < 0.05 for the increase in mean arterial pressure; P < 0.01 for the increase in heart rate). In the absence of a concurrent vagolytic agent, remifentanil was associated with bradycardia or hypotension, or both, in five of 10 patients, compared with one patient who received remifentanil and glycopyrrolate.

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