ABSTRACT
One hundred thirty-five patients undergone microdiscectomy of lumbar disc disease were analysed with soft-ware program which designed for effective analysis for spinal in-patients since February, 1990. Owing to that program, all the patients could be easily analyzed and get a regular follow-up. The surgical result was evaluated by our own score rating system which consists of 4 items:1) Frequency of medication, 2) Degree of social activity, 3) Post-operative symptom compared to pre-operative state and 4) Patient's satisfaction with the operation. According to that system, 21 patients(15.6%) were estimated with failure following microdiscectomy. Among them 6 patients of psychosocial problem, 4 patients of technical errors and 2 patients of recurrence were an important causes of failure. For the purpose of effective surgery for lumbar disc surgery, a careful analysis of the cases of surgical failure should be attempted and also a regular follow-up can be importment factor for more accurate estimation of surgical result.