title: Do not withdraw stylets when advancing spinal needles.
authors.forename: Steven M
authors.initials: SM
authors.lastname: Dunn
mesh_terms: D000775:Anesthesia, Spinal / Q000295:instrumentation* / Q000379:methods*; D004868:Equipment Failure; D006801:Humans; D009339:Needles / Q000592:standards*