当科における頚部脊柱管拡大術の術後成績

Abstract

Since 1984, cervical spinal canal enlargement has been performed in 33 patients with cervical myelopathy (21 with cervical ossification of the posterior longitudinal ligament and 12 with cervical spondylosis). In expansive open-door laminoplasty, the average age at surgery was 57.5 years and the average follow-up period was 4 years and 5 months. In double door laminoplasty, the average age at surgery was 65.3 years and the average follow-up period was 1 year and 2 months. Clinical results were evaluated using JOA score for cervical myelopathy and recovery rates using Hirabayashi's method. In expansive open-door laminoplasty the preoperative average score was 8.7 points, and this improved to 12.2 points postoperatively. The average recovery rate was 42.2%, In double door laminoplasty the average preoperarve score was 8.1 increasing to 11.6 postoperatively The average recovery rate was 39.3%. Radiologically, cervical alignment showed a tendency to be straight, and postoperative cervical antero-posterior movement decreased. Cervical laminoplasty is a useful procedure for treatment of cervical myelopathy.