撑开复位固定系统的研制及其在治疗腰椎滑脱中的临床应用

Distraction Reduction Fixation System and Its Application in Spondylolisthesis

目的 设计研制撑开复位固定系统（distraction reduction fixation system,DRFS）及评估其治疗腰椎滑脱的临床效果。方法应用DRFS治疗腰椎滑脱35例，定期对患者随访，比较术前与术后滑脱比和椎间隙高度，并与其它治疗方法对比，评估其临床疗效。结果术前滑脱比为0.16 ±0.10，术后为0.09 ±0.07（P< 0.001)。其中17例（48.6％）患者滑脱达到完全复位。术前椎间隙高度为(8.16±2.23)mm,术后为(11.30±2.10)mm（P< 0.001)，固定节段内椎间隙高度增加37.3％。术后患者下腰疼痛及腰椎管狭窄的症状完全缓解率为91％。结论DRFS对Ⅱ°以内的腰椎滑脱复位良好，效果肯定，无矫正丢失及不良反应。与其它国内外同类内固定比较，其内置物少，功能较全，手术器械少，操作简单，是目前较为理想的内固定装置。

Objective To design and develop DRFS (distraction reduction fixation system) and to evaluate the results of DRFS in the treatment of spondylolisthesis. Methods 35 patients suffering from spondylolisthesis were treated with DRFS and followed up. The slip rate and height of intervertebral space after operation were compared with those before operation. Results The slip rate was 0.16±0.10 before operation, and decreased to 0.09±0.07 after operation.slip entire reposition was achieved in 17 cases(48.6％). The height of the intervertebral space was (8.16±2.23)mm before operation and (11.30±2.10)mm after operation. Conclusions DRFS achieved better results for spondylolisthesis less than Ⅱdegree and no other adverse effects were found. Compared with other foreign and domestic techniques, it requires lesser implants and operation gears and is easy to utilize in operation. It is proved to be an ideal internal fixation apparatus.