摘要
为探讨逼尿肌不稳定(DI)的产生机制 ,利用能量化调节肌张力和长度的体外肌条试验装置 ,对膀胱出口梗阻 (BOO)和骶髓上脊髓横断 (SCI)后DI进行分组对照研究和药理学研究。结果发现 ,①逼尿肌在适当的张力负荷下均可出现自发性兴奋和收缩 ;②DI逼尿肌在较小的张力负荷下即出现兴奋和收缩 ;在同等张力下DI逼尿肌自发兴奋频率明显高于正常逼尿肌 ;③M受体拮抗剂、ATP和VIP对正常逼尿肌以及DI逼尿肌的自发兴奋均无明显的抑制作用 ;④M受体兴奋剂能显著增加逼尿肌的自发兴奋和收缩频率。提示逼尿肌自身兴奋性增加在DI的发生中有着重要作用 ,这种自发兴奋性并不依赖于M受体。
To investigate the mechanism of detrusor instability, using an apparatus to measure energy regulated tonicity and length of muscle strip in vitro , detrusor instability in bladder outlet obstruction (BOO) and spinal cord injuries (SCI) after pharmacological intervention was studied. The detrusor of both groups contracted under definite tension. Contraction of DI strips occurred under lower tension and under same tension the frequency of contraction was higher in DI detrusor than the normal one. There were no obvious changes when the detrusor strips were treated with M receptor antagonists, ATP or VIP. Muscarinic receptor agonist could increase the excitability of detrusor. The increase of detrusor excitability plays a major role in the occurrence of DI. The excitability is independent on neurogenic factors.
出处
《解放军医学杂志》
CAS
CSCD
北大核心
2003年第2期131-133,共3页
Medical Journal of Chinese People's Liberation Army
基金
国家自然科学基金资助课题 (编号 39970 739)
关键词
逼尿肌不稳定
膀胱出口梗阻
膀胱
神经原性
detrusor instability
bladder outlet obstruction
bladder, neurogenic
