title: Pneumocephalus and headache after epidural analgesia: should we really still be using air?
authors: Olubukola O
authors: OO
authors: Nafiu
authors: Alexandra S
authors: AS
authors: Bullough
mesh_terms: D015360:Analgesia, Epidural / Q000009:adverse effects*; D016362:Analgesia, Obstetrical / Q000009:adverse effects*; D004388:Dura Mater / Q000293:injuries*; D005260:Female; D006261:Headache / Q000209:etiology*; D006801:Humans; D011007:Pneumocephalus / Q000209:etiology*; D011247:Pregnancy