title: [Analysis and strategy on the early complications of lumbar disc herniation with Coflex system].
abstract: OBJECTIVE
  To explore the short-term effectiveness and the cause of the early complications of lumbar disc herniation with Coflex system in order to provide evidence for the prevention.
  
  
  METHODS
  From November 2007 to August 2008, 37 patients (20 males and 17 females) were treated with Coflex system. The age was from 33 to 70 years with an average of 52 years and the history was from 6 to 50 months with an average of 16.5 years. Complications were observed and the short-term effectiveness was evaluated by scores of JOA and ODI before and after operation.
  
  
  RESULTS
  All patients were followed up from 1 to 2 years with an average 20 months. The JOA score increased from 9.09 +/- 1.10 preoperatively to 25.40 +/- 1.20 in the last follow-up. ODI decreased from 24.70 +/- 4.80 preoperatively to 4.80 +/- 1.00 in the last follow-up. The VAS score decreased from 7.86 +/- 0.80 preoperatively to 3.20 +/- 0.50 in the last follow-up. The symptoms remarkably improved. Complications occurred in 4 pa-tients (10.8%), among them, persistent low back pain was in 1 case and conservative treatment did not work; opposite lower limb pain was in 1 case at the 3rd week after operation and symptomatic treatment was effective; displacement of Coflex was in 1 case and Coflex breakage happened in 1 case at the 6th month after operation, but both did not have related clinical symptom.
  
  
  CONCLUSIONS
  Coflex can obtain good clinical outcomes in treating lumbar disc herniation, but it has special complications. The indications and manipulations should be chosen properly.
authors: Department of Orthopaedics, People's Hospital of Shangyu City, Shangyu 312000, Zhejiang, China. xuding831129@126.com
authors: Ding
authors: D
authors: Xu
authors: Hua-Zi
authors: HZ
authors: Xu
authors: Li-Jun
authors: LJ
authors: Wu
authors: Lie-Feng
authors: LF
authors: Ji
authors: Yong-Long
authors: YL
authors: Chi