Test-dose in extradural analgesia.
D000698:Analgesia / Q000379:methods*; D000700:Analgesics / Q000008:administration & dosage; D000767:Anesthesia, Epidural / Q000379:methods*; D000773:Anesthesia, Obstetrical / Q000379:methods; D006801:Humans
D000700:Analgesics