title: Unexpected high spinal block in obstetrics.
authors.forename: M G
authors.initials: MG
authors.lastname: Richardson
authors.forename: R N
authors.initials: RN
authors.lastname: Wissler
mesh_terms: D000368:Aged; D016362:Analgesia, Obstetrical / Q000009:adverse effects*; D001099:Arachnoid / Q000293:injuries; D005260:Female; D006801:Humans; D007022:Hypotension / Q000209:etiology*; D011247:Pregnancy; D013355:Subdural Space