中国神经再生研究(英文版) ›› 2014, Vol. 9 ›› Issue (2): 179-189.doi: 10.4103/1673-5374.125346

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

微球囊压迫治疗三叉神经痛的最佳压迫时间

  

  • 收稿日期:2013-09-01 出版日期:2014-01-10 发布日期:2014-01-10

The optimal distance between two electrode tips during recording of compound nerve action  potentials in the rat median nerve

Yongping Li1, 2, Jie Lao1, Xin Zhao1, Dong Tian1, Yi Zhu1, Xiaochun Wei2   

  1. 1 Department of Hand Surgery of HuaShan Hospital, Fudan University; Key Laboratory of Hand Reconstruction, Ministry of Healthy; Shanghai Key Laboratory of Peripheral Nerve and Microsurgery,  Shanghai, China
    2 Department of Orthopedics, the Second Hospital of Shanxi Medical University, Taiyuan, Shanxi Province, China
  • Received:2013-09-01 Online:2014-01-10 Published:2014-01-10
  • Contact: Jie Lao, Ph.D., Department of Hand Surgery, HuaShan Hospital, No. 12 WuLuMuQi Zhong Road, Shanghai 200040, China, laojie666@163.com.
  • Supported by:

    This study was supported by grants from Hand Function Research Center in Fudan University, China and the Project 211 in China, No. 211XKZ. 

摘要:

经皮穿刺微球囊压迫治疗顽固性三叉神经痛的止痛机制尚未完全明了,操作时的各种参数如压迫时间、压力、球囊形状等目前仍无统一标准。我们以家兔为实验对象,建立经皮穿刺球囊压迫三叉神经节的动物模型,压力为1005±150mmHg,压迫时间为2,5 min。压迫后1,7,14d,电镜下观察发现压迫2,5 min的三叉神经根均表现为大的有髓神经纤维的脱髓鞘改变,主要为髓鞘肿胀和消化腔形成,以压迫5 min组更严重。图像分析仪测量结果显示压迫后的三叉神经节细胞直径无明显改变。提示压迫2 min即可使疼痛传导受到抑制,但对于三叉神经痛复发的患者应给予长时间的压迫。免疫组化染色结果显示压迫后7 d,三叉神经节细胞胞体与轴突内血管内皮生长因子表达均明显增高,但压迫2 min与5 min组差异无显著性意义。说明经皮穿刺球囊压迫三叉神经节后高表达的血管内皮生长因子可能对损伤后神经修复有促进作用。

关键词: 神经再生, 周围神经损伤, 三叉神经痛, 经皮穿刺微球囊压迫术, 三叉神经节细胞, 脱髓鞘, 轴突, 血管内皮生长因子

Abstract:

The distance between the two electrode tips can greatly influence the parameters used for recording compound nerve action potentials. To investigate the optimal parameters for these recordings in the rat median nerve, we dissociated the nerve using different methods and compound nerve action potentials were orthodromically or antidromically recorded with different electrode spacings. Compound nerve action potentials could be consistently recorded using a method in which the middle part of the median nerve was intact, with both ends dissociated from the surrounding fascia and a ground wire inserted into the muscle close to the intact part. When the distance between two stimulating electrode tips was increased, the threshold and supramaximal stimulating intensity of compound nerve action potentials were gradually decreased, but the amplitude was not changed significantly. When the distance between two recording electrode tips was increased, the amplitude was gradually increased, but the threshold and supramaximal stimulating intensity exhibited no significant change. Different distances between recording and stimulating sites did not produce significant effects on the aforementioned parameters. A distance of 5 mm between  recording and stimulating electrodes and a distance of 10 mm between recording and stimulating sites were found to be optimal for compound nerve action potential recording in the rat median nerve. In addition, the orthodromic compound action potential, with a biphasic waveform that was more stable and displayed less interference (however also required a higher threshold and higher supramaximal stimulus), was found to be superior to the antidromic compound action potential.

Key words: nerve regeneration, peripheral nerve injury, compound nerve action potential, median nerve, electrodes, amplitude, supramaximal stimulus intensity, recording electrode, the Project 211 in China, neural regeneration