title: [Clinical research of delayed hyperextension injury concomitance spinal cord injury of cervical spine].
abstract: OBJECTIVE
  To discuss Clinic feature and turnover of delayed hyperextension injury concomitance spinal cord injury of cervical spine.
  
  
  METHODS
  The clinic data of 30 patients delayed hyperextension injury of cervical spine were reviewed and analyzed. Course of disease was from 3 months to 8 years. Thirty patients were divided into three groups according to course of disease. The first group, 3 - 6 months, 17 cases; the second group, 6 - 12 months, 8 cases; the third group, 12 months-8 years, 5 cases. Neurological function improvement rates were evaluated according to the JOA scores at preoperative, 3 months and 1 year post operation, and complications were observed in three groups. Twenty-six cases were treated with anterior decompression, bone graft and plate fixation. Four cases were treated with posterior decompression, bone graft and plate fixation.
  
  
  RESULTS
  The patient number of the three group exist with statistical significance. Thirty patients were followed up for 18 - 39 months, 23 months on average. Neurological function recovery rates were 23.8% in the first group, 53.9% in the second group and 54.3% in the third group at 1 year post operation. JOA scores of the first group and the second group with statistical significance at 3 months and 1 year post operation. JOA scores of the first group and the third group with statistical significance at 3 months and 1 year post operation. JOA scores of the second group and the third group without statistical significance at 3 months and 1 year post operation.
  
  
  CONCLUSIONS
  Incidence of hyperextension injury associated with spinal cord injury of cervical spine would degrade along with course of disease prolong. If delayed spinal cord injury occurred earlier, the patient's condition was severer and badly improvement rate.
authors.affiliation: Department of Orthopaedics, Changzheng Hospital, the Second Military Medical University, Shanghai, China. kanghuicss@163.com
authors.forename: Hui
authors.initials: H
authors.lastname: Kang
authors.forename: Lian-shun
authors.initials: LS
authors.lastname: Jia
authors.forename: Xu-hui
authors.initials: XH
authors.lastname: Zhou
authors.forename: Xiao-min
authors.initials: XM
authors.lastname: Gu
authors.forename: Guo-dong
authors.initials: GD
authors.lastname: Shi
authors.forename: Jia-hu
authors.initials: JH
authors.lastname: Fang
mesh_terms: D000328:Adult; D000368:Aged; D016025:Bone Transplantation; D002574:Cervical Vertebrae / Q000293:injuries* / Q000601:surgery; D019299:Decompression, Surgical; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D013119:Spinal Cord Injuries / Q000209:etiology / Q000473:pathology / Q000601:surgery*; D014911:Whiplash Injuries / Q000150:complications / Q000473:pathology / Q000601:surgery*