Intravenous remifentanil versus epidural ropivacaine with sufentanil for labour analgesia: a retrospective study.

PLoS One · 2014 · PMC4227805 · PMID 25386749

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an increasing trendno p-value reported

Pain reduction was greater in the epidural group throughout the whole study period (0∼180 min) (P<0.0001), and pain scores in the remifentanil group showed an increasing trend one hour later.

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