title: The use of dynamic CT surview for cervical spine clearance in comatose trauma patients: a pilot prospective study.
abstract: BACKGROUND
  Bedside flexion and extension fluoroscopy was proposed for detecting occult ligamentous instability in comatose trauma patients. Nevertheless, a recent study showed that the C7-T1 motion segment is rarely visualised by this technique. We propose a new method for clearing the cervical spine in comatose patients.
  
  
  METHODS
  We conducted a prospective clinical pilot study on 31 consecutive comatose trauma patients to evaluate a new dynamic imaging technique for cervical spine clearance in comatose trauma patients. All patients were examined by a fine-cut helical CT scan of the entire cervical spine (C-spine) and by four-stage flexion-extension examination using the surview function of the CT scanner. The mean range of motion between extension and full flexion, the lowest visualised vertebrae, complications, positive findings, and the time from arrival to clearance was recorded.
  
  
  RESULTS
  The mean range of motion of the subaxial cervical spine was 39 degrees . The C7-T1 segment was fully visualised at the CT surview in 15 patients. The C6-C7 segment was visualised in all patients. No complication directly related to the study protocol was observed. C-spine clearance was completed in less than 6h from arrival in 26 patients.
  
  
  CONCLUSIONS
  The CT surview allows better visualisation of the C6-C7 and cervicothoracic junctions during flexion and extension. A short series of CT cuts can be used when visualisation is inadequate. Further studies are needed to assess the risks and benefits of the suggested protocol.
authors.affiliation: Spine Unit, Assaf Harofeh Medical Center, Zerifin 70300, Israel. fredricag@asaf.health.gov.il
authors.forename: Yoram
authors.initials: Y
authors.lastname: Anekstein
authors.forename: Igor
authors.initials: I
authors.lastname: Jeroukhimov
authors.forename: Yaron
authors.initials: Y
authors.lastname: Bar-Ziv
authors.forename: Ehud
authors.initials: E
authors.lastname: Shalmon
authors.forename: Nir
authors.initials: N
authors.lastname: Cohen
authors.forename: Yigal
authors.initials: Y
authors.lastname: Mirovsky
authors.forename: Youssef
authors.initials: Y
authors.lastname: Masharawi
mesh_terms: D000328:Adult; D001930:Brain Injuries; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging* / Q000293:injuries* / Q000503:physiopathology; D003128:Coma / Q000000981:diagnostic imaging; D005260:Female; D015600:Glasgow Coma Scale; D019416:Head Movements; D006801:Humans; D008297:Male; D009104:Multiple Trauma / Q000000981:diagnostic imaging / Q000503:physiopathology; D010865:Pilot Projects; D011446:Prospective Studies; D016059:Range of Motion, Articular; D014057:Tomography, X-Ray Computed