超短波及电刺激联合神经生长因子治疗大鼠坐骨神经损伤的疗效观察

目的 观察超短波及电刺激联合神经生长因子(NGF)治疗大鼠坐骨神经损伤的疗效.方法 共选取成年雌性Wistar大鼠60只,将其随机分为正常对照组、模型组、NGF组、物理因子组及联合治疗组.将模型组、NGF组、物理因子组及联合治疗组大鼠制成坐骨神经损伤模型.于术后次日开始,NGF组局部给予NGF注射治疗,物理因子组给予超短波及电刺激治疗,联合治疗组则在NGF注射基础上给予超短波及电刺激治疗.于术后次日及术后7,14,30 d时观察各组大鼠坐骨神经恢复情况,同时检测各组大鼠坐骨神经功能指数(SFI)及神经传导速度(NCV).结果 术后发现NGF组、物理因子组及联合治疗组坐骨神经SFI、NCV及神经再生情况均明显优于模型组,并且以联合治疗组的改善幅度尤为显著;在术后30 d时,该组大鼠SFI、NCV及受损神经轴突、髓鞘分布情况均与正常对照组一致,组间差异无统计学意义(P＞0.05);而NGF组、物理因子组上述指标改善均不及联合治疗组及正常对照组(P＜0.05).结论 在NGF注射基础上辅以超短波及电刺激治疗,能进一步促进大鼠坐骨神经损伤后的再生及功能恢复.

Abstract：

Objective To investigate the effects of ultrashortwave (USW) diathermy and electrical stimulation (ES) used in combination with nerve growth factor (NGF) in the treatment of experimental sciatic nerve injury.Methods Sixty adult Wistar rats were randomly divided into a normal control group, a model group, an NGF group,a physiotherapy group and a combined treatment group. A model of sciatic nerve injury was established in the latter four groups. Beginning on the 2nd day after the operation, no treatment was given in the model group, NGF was injected in the NGF group, diathermy and ES were administrated to rats in the physiotherapy group, and the combined treatment group was treated with USW diathermy, EW and NGF. Function, electrophysiology and morphology were evaluated at the 2nd, 7th, 14th and 30th days after the operation Results The average sciatic nerve function index (SFI), nerve conduction velocity (NCV) and nerve regeneration in the NGF, physiotherapy and combined treatment groups were significantly better than in the model group, with those in the combined treatment group improved to the greatest extent. At the 30th day there was no significant difference between the combined treatment group and the normal control group in terms of SFI, NCV, axon regeneration or myelin sheath thickness. The number of myelinated nerve fibers and the average axon diameter in the combined treatment group and normal control group were significantly higher than those in the model, NGF or physiotherapy group. Conclusions With NGF injection, additional application of USW diathermy and ES may significantly enhance the regeneration of the sciatic nerve and aid functional recovery after injury.

Synergistic effects of ultrashortwave electrical stimulation and nerve growth factor in treating sciatic nerve injury