The surgical outcome of degenerative lumbar spinal stenosis

A retrospective study was conducted to assess the surgical outcomes of degenerative lumbar spinal stenosis. Twenty-five patients treated with decompressive surgery in Hospital Kuala Lumpur between January 1992 and August 1996 were reviewed. There were seven males and eighteen females. The average age was 51 years old (range 33 to 64 years old). The diagnosis of degenerative spinal stenosis was made based on the clinical features and was confirmed by radiographic findings. Ninety two percent of the patients had moderate to severe symptoms preoperatively. The types of surgery consisted of laminectomy (n = 15), laminotomy (n = 10), and laminoplasty (n = 1). The surgical outcomes were assessed based on patients' own assessment of symptoms relieved and functional returned to daily activities at least six months after the surgery. The average follow-up period was fifteen months (range 6 months to 42 months). Of these twenty-five patients, 4 (16%) claimed to have excellent results, 11 (44%) had good results, 8 (32%) reported fair, and 2 (8%) judged their surgical treatment as poor with little or no use. There was no anaesthetic, cardiovascular, or thromboembolic complications seen in this study. Four patients had recurrent claudication, one demonstrated localised arachnoiditis, and two had lumbar instability which were not documented preoperatively. One patient had L4 nerve root avulsion with dura torn and another patient had superficial wound infection. We concluded in this study that decompressive surgery offers satisfactory results in patients with moderate to severe degenerative spinal stenosis in short term follow-up.