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Effect of Pulsed Radiofrequency on Rat Sciatic Nerve Chronic Constriction Injury： A Preliminary Study
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Effect of Pulsed Radiofrequency on Rat Sciatic Nerve Chronic Constriction Injury： A Preliminary Study
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Journal Article
Effect of Pulsed Radiofrequency on Rat Sciatic Nerve Chronic Constriction Injury： A Preliminary Study
2015
Overview
Background：Pulsed radiofrequency （PRF） application to the dorsal root ganglia can reduce neuropathic pain （NP） in animal models,but the effect of PRF on damaged peripheral nerves has not been examined.We investigated the effect of PRF to the rat sciatic nerve （SN） on pain-related behavior and SN ultrastructure following chronic constriction injury （CCI）.Methods：The analgesic effect was measured by hindpaw mechanical withdrawal threshold （MWT） and thermal withdrawal latency （TWL）.Twenty rats with NP induced by ligating the common SN were then randomly divided into a PRF treatment group and a sham group.The contralateral SN served as a control.The MWT and TWL were determined again 2,4,6,8,10,12,and 14 days after the PRF or sham treatment.On day 14,ipsilateral and contralateral common SNs were excised and examined by electron microscopy.Results：Ipsilateral MWT was significantly reduced and TWL significantly shorter compared to the contralateral side 14 days after CCI （both P =0.000）.In the PRF group,MWT was significantly higher and TWL significantly longer 14 days after the PRF treatment compared to before PRF treatment （both P =0.000）,while no such difference was observed in the sham group （P ＞ 0.05）.Electron microscopy revealed extensive demyelination and collagen fiber formation in the ipsilateral SN of sham-treated rats but sparse demyelination and some nerve fiber regrowth in the PRF treatment group.Conclusions：Hyperalgesia is relieved,and ultrastructural damage ameliorated after direct PRF treatment to the SN in the CCI rat model of NP.
Publisher
Medknow Publications Pvt Ltd,Medknow Publications and Media Pvt. Ltd,Lippincott Williams & Wilkins Ovid Technologies,Department of Anesthesiology, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China%Department of Anesthesiology and Pain Management, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China%Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China,Medknow Publications & Media Pvt Ltd,Wolters Kluwer
Subject
/ Animals
/ Electric stimulation therapy
/ Male
/ Original
/ Peripheral Nerve Injuries - therapy
/ Peripheral nervous system diseases
/ PRF
/ Pulsed Radiofrequency Treatment
/ Rats
/ Rodents
/ Sciatic Neuropathy - therapy
/ Studies
/ 坐骨神经
/ 大鼠模型
/ 射频
/ 微结构损伤
/ 慢性
/ 治疗作用
/ 脉冲
