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首页> 中文期刊> 《当代医学科学(英文)》 >Experimental Study of Excitability and Autorhthmicity in Urinary Bladder Detrusor of Diabetes Rats

Experimental Study of Excitability and Autorhthmicity in Urinary Bladder Detrusor of Diabetes Rats

         
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The changes in excitability and autorhthmicity of bladder detrusor in experimental non-insulin dependent diabetes mellitus (NIDDM) rats were observed. Sixty-nine NIDDM rats as NIDDM group and 69 normal rats as control group were enrolled into this experimental study. At 6th, 10th, 14th, 18th, 22nd and 26th week after the rats were injected last time, the changes in the excitability and autorhthmicity of detrusor strips in vitro were observed. The results showed that the threshold of the tension which made the detrusor strips contract was significantly higher in NIDDM group (0.716±0.325 g) than in control group (0.323±0.177 g)(F=59.63, P<0.001). At different stages, the threshold of the tension resulting the contract of the detrusor strips in NIDDM group was also higher than in control group. At 18th week after STZ injection, the frequency of spontaneous contract of the detrusor strips in NIDDM was significantly higher than in control group (P<0.05), whereas at 22nd week, that in NIDDM group was significantly lower than in control group (P<0.05). It was concluded that the decreased excitability of the bladder detrusor was the earliest and most obvious changes in bladder function in diabetes rats and the autorhthmicity had also changed at the early stage of diabetic bladder.

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