Twelve women in active, painful labor were treated with continuous subarachnoid analgesia via a 32 G catheter which was inserted 3ndash;5 cm in the vertebral theca through a 26 G spinal needle placed via a paramedian approach. After IV hydration 0.5 ml of 0.25percnt; (1.25 mg) isobaric bupivacaine was injected; 10ndash;15 min later, if analgesia was not satisfactory, another 0.5ndash;1.0 ml was given.
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