Epidural anesthetic dose responses in patients 20 to 80 years old.
D000328:Adult; D000368:Aged; D000375:Aging; D000767:Anesthesia, Epidural; D002045:Bupivacaine / Q000008:administration & dosage; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008875:Middle Aged
D002045:Bupivacaine