British Journal of Anaesthesia, Vol 82, Issue 4 639-640, Copyright © 1999 by The Board of Management and Trustees of the British Journal of Anaesthesia
J. Lee, A. T. Lovell, M. G. Parry, H. R. Glaisyer and L. M. Bromley
In a double-blind, randomized, placebo-controlled study, 41 patients
received clonidine 3 micrograms kg-1 or placebo at induction of isoflurane
and nitrous oxide in oxygen anaesthesia. Metoprolol was also given to
achieve a systolic arterial pressure of 80 mm Hg. Requirements for
metoprolol were significantly less in the clonidine group (P < 0.00035),
with no significant difference in mean arterial pressures over time. It
would appear that clonidine is an i.v. hypotensive agent worthy of
consideration, but data during the recovery period are required to comment
further on the safety of this technique.
SHORT COMMUNICATIONS
I.v. clonidine: does it work as a hypotensive agent with inhalation anaesthesia?
Department of Anaesthesia, Royal National Throat Nose and Ear Hospital, Grays Inn Road, London WC1X 8DA, UK
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