CERVICAL LAMINOPLASTY; OPEN DOOR CERVICAL LAMINOPLASTY FOR OSSIFICATION OF POSTERIOR LONGITUDINAL LIGAMENT; A TERTIARY CARE EXPERIENCE FROM KARACHI, PAKISTAN.
Background and Objectives: To analyze the functional outcome of open door laminoplasty (ODL) for the treatment of Cervical Ossified Posterior Longitudinal Ligament (OPLL). Study Design: Case series study. Setting: Civil Hospital Karachi. Period: 05 years, 2013 to 2017. Material & Methods: 18 patients (15 Male, 3 Female) underwent ODL for cervical OPLL, over a period of 5 years. Pre-operative & post-operative degree of myelopathy was assessed using Nurick grading score. Patients with Nurick grade > 2 were included in study. MRI compatible titanium micro plates & screws were used. Instability was assessed by X-ray Cervical Spine obtained 6 weeks post-operatively. Results: Mean age of presentation was 52 years. 2 to 3 levels were involved in most cases. Mean operative time was 2 hours 30 minutes. Following Nurick grading 94.4% (n=17) improved by grade 1 or more, while in only 5.6% (n=1) it remained same. No instability or kyphotic deformity was seen on follow up X-rays. Conclusion: ODL is a safe & effective procedure for the treatment of multiple level OPLL. It can avoid complications related to the anterior approach (like unintentional durotomy & spinal cord injury) and diminished the possibility of instability & kyphotic deformity associated with laminectomy alone.