经皮激光颈椎间盘减压术对颈椎稳定性的影响

背景经皮激光椎间盘减压术是一项脊柱微创手术新技术,逐步在临床广泛应用.目的评价经皮激光椎间盘减压术对颈椎稳定性的影响.设计以患者为研究对象,前后对照观察研究.单位暨南大学附属第二医院深圳市人民医院脊柱外科.对象2001-10/2003-04暨南大学附属第二医院深圳市人民医院脊柱外科收治侧旁型颈椎间盘突出症患者28例,29个椎间盘,男17例,女11例.干预在X射线监视下,9号穿刺导针颈前穿刺,将400μm光导纤维导入病损椎间盘内,使用波长1060nm的NDYAG激光,输出功率15 W,对髓核进行汽化、减压,接受激光剂量为500～950 J.主要观察指标观察治疗前及术后6个月手术椎间盘相邻椎体前后横向位移及成角情况.结果过屈位、过伸位手术前后手术椎间盘相邻椎体的位移差异无显著性意义(t=0.8117～0.827 2,P＞0.05);其相邻椎体角度大小差异无显著性意义(t=0.768 7～0.827 1,P＞0.05).结论经皮激光椎间盘减压术治疗侧旁型颈椎间盘突出症,操作简易,损伤小,影响颈椎稳定性.

Percutaneous laser disc decompression for the stability of cervical vertebra

BACKGROUND: As a novel procedure in minimally invasive spine surgery (MISS), percutaneous laser disc decompression(PLDD) has been applied widely in the recent development in clinical practices.OBJECTIVE: This study was designed to evaluate the influences of PLDD on the stability in cervical spinal constructs.DESIGN: A before-after comparison trail based on patients.SETTING: The experiment was performed at the spine surgery department of a hospital affiliated to a university.PARTICIPANTS: Twenty-eight patients who were diagnosed as lateral cervical disc herniation at the Spine Surgery Department of Shenzhen People' s Hospital, Second Hospital Affiliated to Jinan University were involved from October 2001 to April 2003. Of all of the patients, 17 were male and 11 were female. They have 29 cervical disc protrusions altogether.INTERVENTIONS: Monitored by X-ray, a 400 μm fixed optical fiber was introduced into the injured intervertebral disc via a 9-gauge flexible trocar through an anterior cervical approach. An Nd-YAG laser system,with a 1 060 nm wavelength and an output power of 15W, was employed to ablate or decompress the inner disc tissue. The disc tissue was exposedto 500- 950 J laser powers.MAIN OUTCOME MMEASURES: Before and 6 months after the PLDD, the deviation of adjacent vertebra displacements was observed and changings of the wedge angles of the intervertebral discs were calculated respectively.RESULTS: The deviation of adjacent vertebra displacements showed no significant difference between before and after operation, when the patients were examined with a more flexed-position or a more extended-position(t=0.811 7-0.827 2, P＞ 0.05), and no significant changes in the wedge angles of the intervertebral discs could be observed either(t=0.768 7-0.827 1,P ＞ 0.05).CONCLUSION: Applying percutaneous laser disc decompression to lateral cervical disc herniation has many advantages, such as simplicity of operation, minimal invasion and having no impact on the stability in cervical spinal constructs.