Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (9): 1575-1578.doi: 10.3969/j.issn.1673-8225.2011.09.014

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Coflex interspinous process dynamic internal fixation for the treatment of middle-aged lumbar rotation instability: Short-term lumbar stability evaluation

Guan Hua-qing, Yang Hui-lin, Xu Yao-zeng, Yang Tong-qi   

  1. Department of Orthopedics, First Hospital of Soochow University, Suzhou  215006, Jiangsu Province, China
  • Received:2010-09-16 Revised:2010-11-20 Online:2011-02-26 Published:2011-02-26
  • Contact: Yang Hui-lin, Doctor, Chief physician, Professor, Doctoral supervisor, Department of Orthopedics, First Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
  • About author:Guan Hua-qing☆, Studying for doctorate, Attending physician, Department of Orthopedics, First Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China ghq96205@163.com

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Abstract:

BACKGROUND: Coflex interspinous dynamic internal fixation is mainly applied for degenerative lumbar spinal stenosis patients. It remains unclear whether the indication of Coflex can be enlarged.
OBJECTIVE: To evaluate the early clinical results of Coflex interspinous dynamic internal fixation for middle-aged lumbar rotation instability.
METHODS: A total of 11 middle-aged patients with lumbar rotation instability were treated with Coflex interspinous dynamic internal fixation. The operation levels were all at L4-5 segments. The Japanese Orthopaedic Association (JOA) questionnaires were assessed before and after operation. The radiological measurement included segmental intervertebral angles including neutral angle, flexion angle, extension angle and the range of motion (ROM) of L4-5 segments. The operating time and the blood loss during operation were also observed.
RESULTS AND CONCLUSION: All the patients were followed up for 6 months. The average operating time was 72.6 minutes, and blood loss during operation was 85.7 mL. Compared with pre-operation, the JOA score of 6 months after operation were raised from 14.45±2.42 to 21.00±2.24 (P < 0.05), and the ROM of L4-5 segment decreased from (13.18±2.04)° to (8.09±0.94)° (P < 0.05). Coflex device shows a good early result for the treatment of middle-aged lumbar rotation instability and improved intervertebral rotation instability, but the long-term outcomes and complications need further evaluation.

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