Thirty patients with prolonged or persistent retention of the placenta were randomized to either paracervical block or intravenous cocktail of pethidine and diazepam. When paracervical block worked, the analgesia produced was better than that usually achieved with intravenous cocktail of pethidine and diazepam. From a cost-benefit point of view paracervical block is preferable to intravenous cocktail. No significant side-effects occurred during the trial.
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