title: Why do pharmacologic test doses fail to identify the unintended intrathecal catheter in obstetrics?
authors.forename: Jill M
authors.initials: JM
authors.lastname: Mhyre
mesh_terms: D000773:Anesthesia, Obstetrical / Q000379:methods*; D000779:Anesthetics, Local / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008012:Lidocaine / Q000008:administration & dosage*; D011247:Pregnancy
chemical_list: D000779:Anesthetics, Local; D008012:Lidocaine