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The optimum time interval for 10 ml boluses of bupivacaine 0.0625% + fentanyl 2 μg.ml−1 as part of a programmed intermittent epidural bolus regimen has been found to be 40 min. This regimen was shown to be effective without the use of supplementary patient‐controlled epidural analgesia boluses in 90% of women during the first stage of labour, although with a rate of sensory block to ice above T6 in...
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