title: An unexpected and preventable cause of failed epidural analgesia.
authors.forename: B J
authors.initials: BJ
authors.lastname: Prater
authors.forename: C
authors.initials: C
authors.lastname: Timberlake
mesh_terms: D015360:Analgesia, Epidural / Q000295:instrumentation*; D001064:Appendicitis / Q000601:surgery; D004868:Equipment Failure; D006801:Humans; D007813:Laparotomy / Q000379:methods; D008297:Male; D008875:Middle Aged