Ultrasonic localization of the lumbar epidural space.
D000328:Adult; D000767:Anesthesia, Epidural / Q000379:methods*; D001827:Body Height; D001830:Body Surface Area; D001835:Body Weight; D004824:Epidural Space; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D014465:Ultrasonics