British Journal of Anaesthesia, Vol 75, Issue 1 19-22, Copyright © 1995 by The Board of Management and Trustees of the British Journal of Anaesthesia
G. Sudarshan, B. L. Browne, JNS. Matthews and I. D. Conacher
This double-blind, placebo-controlled study investigated the efficacy of
intermittent doses of intrathecal fentanyl in 30 patients undergoing
thoracotomy. They were allocated randomly to three groups, two of which had
microspinal catheters inserted into the lumbar subarachnoid space at the
end of surgery; the third group acted as a control. Intrathecal fentanyl or
0.9% saline was administered through the catheters and all patients
received morphine using a patient-controlled analgesia (PCA) system. Pain
scores, morphine consumption and peak expiratory flow rates (PEFR) were
recorded on an hourly basis. Intrathecal fentanyl resulted in a faster
onset of analgesia (mean visual analogue scale (VAS) score at 1 h = 0.9
compared with 6.3 (95% confidence intervals for the difference -6.8, -4.0)
for the other groups; P < 0.001) and significantly lower pain scores at
rest, on cough and on movement. PEFR values were consistently higher in the
intrathecal fentanyl group. There were no cases of early or delayed
respiratory depression.
CLINICAL INVESTIGATIONS
Intrathecal fentanyl for post-thoracotomy pain
Department of Cardiothoracic Anaesthesia, Freeman Hospital, High Heaton, Newcastle upon Tyne NE7 7DN
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