title: Identification of the epidural space: air or saline?
authors.forename: Scott A
authors.initials: SA
authors.lastname: Lang
mesh_terms: D000328:Adult; D015360:Analgesia, Epidural / Q000009:adverse effects / Q000379:methods*; D004824:Epidural Space / Q000033:anatomy & histology*; D006801:Humans