title: An unusual source of air during regional anaesthesia.
authors.forename: H
authors.initials: H
authors.lastname: Rose
authors.forename: I
authors.initials: I
authors.lastname: Ahmed
mesh_terms: D000388:Air; D001917:Brachial Plexus / Q000000981:diagnostic imaging; D004868:Equipment Failure; D006801:Humans; D009339:Needles; D009407:Nerve Block / Q000295:instrumentation*; D018084:Ultrasonography, Interventional