title: The occurrence of unblocked segments during continous lumbar epidural analgesia for pain relief in labour.
mesh_terms: D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D002045:Bupivacaine; D004837:Epinephrine; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae; D011247:Pregnancy; D012189:Retrospective Studies
chemical_list: D002045:Bupivacaine; D004837:Epinephrine