Transforaminal Selective Nerve Root Blocks for Treating Single Lumbosacral Radiculopathy: The Short-term Outcome and Efficiency / 대한정형외과학회잡지

ABSTRACT

PURPOSE: We wanted to determine the clinic usefulness of selective nerve root block for treating lumbosacral radiculopathy that's due to a herniated nucleus pulposus (HNP) or foraminal stenosis (FS) by analyzing the short-term results after the selective nerve root block (SNRB) procedure. MATERIALS AND METHODS: Sixty-five patients were investigated in our research. Sixty-five patients were divided into two groups thirty-seven patients of group one were the HNP patients and twenty-eight patients of group two were the FS patients. The effect of SNRB treatment was assessed by the degree of radiating pain in lower legs with using the visual analogue scale (VAS) and patients' subjective satisfaction. The average overall follow-up period was eleven months that of the first group was 13.5 months and that of the group was 7.6 months. RESULTS: For the 65 patients, the average VAS was 7.8 before a SNRB procedure and this decreased to 2.9 and 3.4 after one to three SNRB procedures, respectively. For group one, the VAS was 7.4 before the procedure and it decreased to 3.3 at one month and 3.7 at three months after the procedure. For group two, the VAS was 8.3 before the SNRB procedure and this favorably changed to 2.3 at one month and 3.0 at three months after the procedure. An operation was carried out due to no response for 8 patients (12%) and due to aggravation for 4 patients (6%) after the SNRB procedures. Three patients (8%) of group one and two patients (11%) of group two obtained pain relief at one month and aggravation at three months, respectively. On comparing the two groups, a better treatment effect was observed for the FS group after one month (p=0.002) and three months (p=0.01). Complications related to the SNRB procedure haaves not been observed in both groups. CONCLUSION: The SNRB procedure is a very effective and safe procedure, after the appearance of symptoms, as a non-operative treatment for single lumbosacral radiculopathy due to a herniated nucleus pulposus or foraminal stenosis. This treatment appears to be more effective for the FS group than for the HNP group and it should be considered before carrying out an operative treatment.