British Journal of Anaesthesia, Vol 84, Issue 1 100-102, Copyright © 2000 by Oxford University Press
AP Hall, JP Thompson, NA Leslie, AJ Fox, N Kumar and DJ Rowbotham
We have compared three bolus and infusion regimens of remifentanil on the
cardiovascular response to laryngoscopy and orotracheal intubation in three
groups of 20 ASA I-II female patients, in a randomized, double- blind
study. Patients in group 1 received glycopyrolate 200 micrograms i.v.
followed by a bolus dose of remifentanil 1 microgram kg-1 over 30 s and an
infusion of remifentanil at a rate of 0.5 microgram kg-1 min- 1. The other
patients received remifentanil 0.5 microgram kg-1 over 30 s and an infusion
of 0.25 microgram kg-1 min-1 with (group 2) or without (group 3)
pretreatment with glycopyrrolate 200 micrograms. All patients then received
a sleep dose of propofol, rocuronium 0.6 mg kg-1 and 1% isoflurane with 67%
nitrous oxide in oxygen. Laryngoscopy and tracheal intubation were
performed 3 min later. Heart rate and arterial pressure were recorded at
1-min intervals from before induction of anaesthesia until 5 min after
intubation. Baseline heart rate was similar in all groups, but decreased in
group 3 (no glycopyrrolate) after induction and remained significantly
lower after intubation compared with the other groups (P < 0.05). Heart
rate and arterial pressure increased slightly after intubation in each
group but there were no significant differences in mean arterial pressure
between groups at any time. The incidence of bradycardia (one patient in
group 2) and hypotension (two patients in groups 1 and 2 and three patients
in group 3) was low.
ARTICLES
Comparison of different doses of remifentanil on the cardiovascular response to laryngoscopy and tracheal intubation
University Department of Anaesthesia and Pain Management, Leicester Royal Infirmary, UK.
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