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[Decompression and nonfusion dynamic stable system for spinal stenosis with degenerative lumbar scoliosis].

OBJECTIVE
To analyze the clinical effects of decompression and non-fusion dynamic stable system in treating spinal stenosis with a mild to moderate degree of degenerative lumbar scoliosis(DLS).


METHODS
The clinical data of 48 patients with spinal stenosis and DLS underwent sugical treatment of decompression and non-fusion dynesys system were retrospectively analyzed. There were 17 males and 31 females, aged from 54 to 78 years old with an average of(64.3±5.7)years. The lumbar lordosis, lumbar scoliosis and range of motion were observed by image, the states of back pain and leg pain were evaluated by visual analogue scale(VAS), the clinical functions were assessed by Oswestry Disability Index(ODI).


RESULTS
A total of 68 segments in 48 patients were treated by decompression and nonfusion stable system. All patients were followed up more than 2 years, follow-up time in range was 24 to 74 months with an average of (31.4±10.4) months. Operation time was 100 to 220 (183.1±31.8) min, intraoperative bleeding was 100 to 500 (222.0±115.3) ml, hospital day was 4 to 9 (6.5±1.9) d. Postoperative lumbar scoliosis was obviously improved (P<0.05), lumbar lordosis and range of motion was not effected. At final follow-up, VAS of back pain and leg pain were 3.5±2.4 and 4.2±4.3, ODI was(36.5±5.8)%, had obviously improved than preoperation.


CONCLUSIONS
Using nonfusion stable system after decompressive surgery resulted in a safe and effective procedure for elderly patients with lumbar stenosis of a mild to moderate scoliosis (scoliosis angle <30°).