Abstract
Background
It is a challenge to reduce and immobilize the broken “bamboo spine”, especially for the upper cervical spine, in patients with ankylosing spondylitis (AS) before and during posterior surgery.
Methods
We retrospectively analyzed the case histories, operations, neurologic outcomes, follow-up data, and imaging records of 17 patients with AS and upper cervical spine fracture-dislocation who underwent surgical treatment in three clinical spine center from 2010 to 2019. A halo vest was used to reduce and immobilize fractured spinal column ends. The neurological injury was evaluated using the American Spinal Injury Association (ASIA) impairment scale score and Japanese Orthopaedic Association (JOA) score before and after operation. Complications and time of bone fusion were recorded.
Results
Fourteen patients achieved closed anatomical reduction after halo vest application. No displacement in fracture ends and loss of reduction occurred after prone position. No patient presented with secondary neurological deterioration. All patients was performed posterior surgery. The surgery improved the ASIA grade in all patients (P < 0.001). The mean JOA score also increased significantly at last follow-up compared to preoperation (14.5 ± 2.3 vs. 9.2 ± 2.4, P < 0.01). No severe complication and death occurred. All patients reached solid bony fusion at 12-month follow-up.
Conclusions
Use of a halo vest before and during the operation is safe and effective in patients with AS who develop upper cervical spine fracture-dislocation. This technique makes positioning, awake nasoendotracheal intubation, nursing, and the operation more convenient. It can also provide satisfactory reduction and rigid immobilization and prevent secondary neurologic deterioration. .
Upper Cervical Spine Fracture-Dislocation in Patients With Ankylosing Spondylitis: Application of Halo Vest Before and During Posterior Surgery