British Journal of Anaesthesia, Vol 76, Issue 5 611-615, Copyright © 1996 by The Board of Management and Trustees of the British Journal of Anaesthesia
D. W. Cooper, D. M. Ryall, F. E. McHardy, S. L. Lindsay and S. S. Eldabe
In this randomized, double-blind study of 60 patients, we have assessed the
analgesic efficacy of extradural bupivacaine and extradural fentanyl,
either alone or in combination, after Caesarean section. Patients received
0.1% bupivacaine (group B), fentanyl 4 micrograms ml- 1 (group F) or 0.05%
bupivacaine combined with fentanyl 2 micrograms ml- 1 (group BF) by
patient-controlled extradural analgesia (PCEA). Adding fentanyl to
bupivacaine reduced the dose of bupivacaine by up to 68%, improved
analgesia at rest and decreased PCEA use. Motor and sensory block were
decreased, but there was more pruritus. Overall patient satisfaction was
increased. Adding bupivacaine to fentanyl reduced the dose of fentanyl by
up to 57% without altering pain scores or PCEA use. Sensory block increased
but pruritus did not decrease. Bupivacaine 0.05% produced clinically
significant leg weakness in three patients. Overall patient satisfaction
was not altered. There was a significant additive analgesic effect between
0.05% bupivacaine and fentanyl but no clinical benefit was demonstrated
from using the combination compared with fentanyl alone for this group of
postoperative patients.
CLINICAL INVESTIGATIONS
Patient-controlled extradural analgesia with bupivacaine, fentanyl, or a mixture of both, after Caesarean section
Department of Anaesthetics, South Cleveland Hospital, Middlesbrough, Cleveland TS4 3BW
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