中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (49): 7932-7937.doi: 10.3969/j.issn.2095-4344.2015.49.011

• 脑及脊髓损伤动物模型 Animal models of brain and spinal cord injuries • 上一篇    下一篇

电刺激脊髓损伤模型兔肛周皮肤调控神经源性膀胱内压

闫 鹏1,郑伟东1,谭云冰1,邓小明1,杨小玉2   

  1. 1吉林省人民医院脊柱外科,吉林省长春市 130000;2吉林大学第二医院骨科医院,吉林省长春市 130000  
  • 收稿日期:2015-09-05 出版日期:2015-11-30 发布日期:2015-11-30
  • 通讯作者: 通讯作者:杨小玉,博士,主任医师,吉林大学第二医院骨科医院,吉林省长春市 130000
  • 作者简介:闫鹏,男,1980年生,吉林省通化市人,汉族,2011年吉林大学毕业,博士,主治医师,主要从事脊髓损伤康复方面的研究。
  • 基金资助:

    吉林省科委国际合作项目资助(20100735),项目名称:《新型神经假体的研制及在脊髓损伤后膀胱功能重建中的应用》

Electrical stimulation of the perianal skin regulates neurogenic intravesical pressure in rabbit models of spinal cord injury

Yan Peng1, Zheng Wei-dong1, Tan Yun-bing1, Deng Xiao-ming1, Yang Xiao-yu2   

  1. 1Department of Spinal Surgery, Jilin Province People’s Hospital, Changchun 130000, Jilin Province, China; 2Bethune Second Hospital of Jilin University, Changchun 130000, Jilin Province, China
  • Received:2015-09-05 Online:2015-11-30 Published:2015-11-30
  • Contact: Yang Xiao-yu, M.D., Chief physician, Bethune Second Hospital of Jilin University, Changchun 130000, Jilin Province, China
  • About author:Yan Peng, M.D., Attending physician, Department of Spinal Surgery, Jilin Province People’s Hospital, Changchun 130000, Jilin Province, China
  • Supported by:

    a grant from Jilin Province Science and Technology Commission International Cooperation Projects of China, No. 20100735

摘要:

背景:以往研究表明通过不同频率电刺激阴部神经及其分支会抑制膀胱逼尿肌的过度活动,从而治疗神经源性膀胱,基于此,能否通过电刺激阴部神经分支来抑制逼尿肌过度活动呢?
目的:探讨电刺激脊髓损伤兔肛周皮肤调控神经源性膀胱内压可行性。
方法:选择成年雌性兔10只,在T9-T10水平横断脊髓,饲养4周后开始进行实验,电刺激采用一对钩状电极刺激肛门周围的皮肤,在膀胱内插入双腔球囊导管注入生理盐水,测量膀胱内压力。
结果与结论:当膀胱灌注量高于排尿容积阈值时,以低于10 Hz的频率电刺激肛周,会显著抑制膀胱逼尿肌过度活动;当膀胱灌注量低于排尿容积阈值时,刺激频率在20-50 Hz时,会引起膀胱收缩。最佳抑制刺激    (6 Hz)能显著增加膀胱容积(30±10)%,最佳的兴奋刺激(25 Hz)能引起大幅度(超过25 cm H2O即24.5 kPa)、长时间(20 s)的膀胱收缩。结果表明电刺激脊髓损伤兔肛周皮肤可以有效调控神经源性膀胱压力。
 

关键词: 实验动物模型, 脑及脊髓损伤动物模型, 电刺激, 脊髓损伤, 神经源性膀胱, 膀胱内压, 兔, 肛周皮肤

Abstract:

BACKGROUND: Previous studies have shown that different frequencies of electrical stimulation of pudendal nerve and its branches can inhibit detrusor overactivity, thereby treating neurogenic bladder. Based on this, is it possible to inhibit detrusor overactivity through electrical stimulation of pudendal nerve branches?
OBJECTIVE: To investigate the feasibility of electrical stimulation of the perianal skin regulating neurogenic intravesical pressure in rabbit models of spinal cord injury.
METHODS: Ten adult female rabbits were selected and subjected to spinal cord transection at T9-T10 level. After 4 weeks of feeding, the experiment began. The skin around the anus was stimulated using a pair of hook-shaped electrodes. A double-lumen balloon catheter was inserted into the bladder. Normal saline was infused into the double-lumen balloon catheter. Intravesical pressure was measured.
RESULTS AND CONCLUSION: When the perfusion volume of the bladder was higher than the threshold of voiding volume, detrusor overactivity was significantly inhibited after perianal electrical stimulations at frequencies below 10 Hz. When the perfusion volume of bladder was lower than the threshold of voiding volume, bladder 
contractions were induced by electrical stimulations at frequencies between 20 and 50 Hz. The optimal inhibitory stimulation (6 Hz) could significantly increase the bladder capacity of (30±10)%. The optimal excitatory stimulation (25 Hz) could induce large amplitude (greater than 25 cm H2O, i.e. 24.5 kPa), long duration (greater than 20 seconds) of bladder contractions. These results demonstrate that electrical stimulation of the perianal skin can effectively regulate neurogenic intravesical pressure in rabbit models of spinal cord injury. 
 

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