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Spine

CERVICAL SPINE INJURIES IN PATIENTS WITH ANKYLOSING SPONDYLITIS

British Association of Spinal Surgeons (BASS)



Abstract

Purpose

Patients with ankylosing spondylitis (AS) are vulnerable to cervical spine injury following relatively minor trauma. The authors present a retrospective review to determine the characteristics, treatment and outcome following cervical spine injury in these patients.

Methods

Retrospective analysis of case notes and images of patients with AS admitted to the Spinal Injury Unit over a 10-year period.

Results

Thirty-nine patients were identified. Records were available for 31 patients at the time of this analysis. The median age was 62 years (range 37-84). The male:female ratio was 7:1. Mechanisms of injury included falls (72%) and RTAs (7%), while 14% were unable to recall an injury. Alcohol was involved in 20% of the cases. Fracture through an ankylosed disc in the mid to low cervical spine was the commonest injury. Concomitant non-contiguous bony injury was seen in 2 patients. More than half (55%) were Grade E on ASIA impairment scale (AIS), while 14% were Grade A and 31% Grade D. Two patients required skull traction. Most patients were successfully treated by external immobilisation. Halo crown and jacket was the most common orthosis used. Twelve patients underwent surgical stabilisation. The mean duration of external immobilisation in the non-surgical group was 13 weeks (range 10-32), whereas following surgery it was 6 weeks (range 2-8). Adequate radiological evidence of fusion was seen in all 22 patients for whom this information was available at a median of 22 weeks (range 12-32). Patients with AIS Grade A and E were unchanged at discharge, while 4 patients in AIS Grade D improved to E.

Conclusion

External immobilisation with halo in an effective first-line therapy in achieving fusion and stability. Surgical stabilisation can be reserved as a second-line treatment.