title: Unexpected loss of resistance.
authors.forename: D
authors.initials: D
authors.lastname: Mackie
authors.forename: J
authors.initials: J
authors.lastname: Cranfield
authors.forename: K
authors.initials: K
authors.lastname: Boddu
mesh_terms: D000767:Anesthesia, Epidural / Q000295:instrumentation*; D004868:Equipment Failure; D005260:Female; D006801:Humans; D008297:Male; D009339:Needles