title: Identifying survivors with traumatic craniocervical dissociation: a retrospective study.
abstract: BACKGROUND
  Traumatic craniocervical dissociation (CCD), which includes atlanto-occipital dissociation and vertical distraction between C1-C2, is often an immediately fatal injury that has increasingly been associated with survival to the hospital. Our aim was to identify survivors of CCD based on clinical presentation.
  
  
  METHODS
  We retrospectively reviewed the Harborview Medical Center Trauma Registry and the King County Medical Examiners database from 2001 to 2006. Patients>or=12 y old were identified by ICD-9 code, radiographic diagnosis on lateral cervical spine films, and CT. We examined age, gender, mechanism of injury, presentation and prehospital and hospital interventions, and radiographic findings to distinguish survivors and non-survivors.
  
  
  RESULTS
  Of 69 patients with CCD, 47 were diagnosed post mortem, 22 were diagnosed in hospital, and seven survived to discharge. When comparing survivors and non-survivors, age, gender, and injury severity score were not significant. Survivors had significantly higher GCS, and were more likely to be normotensive; none had cervical cord injury; 80% of non-survivors had a basion-dental interval (BDI) of >or=16mm.
  
  
  CONCLUSIONS
  Trauma patients diagnosed with CCD in the ED, with cervical cord injury, requiring CPR, and with GCS of 3 will not survive their injury. Wider BDI is associated with mortality.
authors.affiliation: Department of Surgery, Brigham and Women's Medical Center, Harvard University, Boston, Massachusetts 02115, USA. zcooper@partners.org
authors.forename: Zara
authors.initials: Z
authors.lastname: Cooper
authors.forename: Joel A
authors.initials: JA
authors.lastname: Gross
authors.forename: J Matthew
authors.initials: JM
authors.lastname: Lacey
authors.forename: Neal
authors.initials: N
authors.lastname: Traven
authors.forename: Sohail K
authors.initials: SK
authors.lastname: Mirza
authors.forename: Saman
authors.initials: S
authors.lastname: Arbabi
mesh_terms: D000328:Adult; D001268:Atlanto-Axial Joint / Q000293:injuries*; D001269:Atlanto-Occipital Joint / Q000293:injuries*; D005260:Female; D015600:Glasgow Coma Scale; D006801:Humans; D004204:Joint Dislocations / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D017741:Survivors / Q000706:statistics & numerical data*; D020196:Trauma, Nervous System / Q000401:mortality*; D014861:Washington / Q000453:epidemiology; D055815:Young Adult