title: Identification of the epidural space: loss of resistance to air or saline?
authors.forename: D B
authors.initials: DB
authors.lastname: Scott
mesh_terms: D000368:Aged; D000388:Air; D000776:Anesthesiology / Q000379:methods*; D004824:Epidural Space / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D007268:Injections, Epidural; D012965:Sodium Chloride / Q000008:administration & dosage*
chemical_list: D012965:Sodium Chloride