人体消化道黏液流变学性能的研究

Study on Viscosity Property of Gastrointestinal Mucus

为探讨人体消化道黏液流变学特性 ,采用 L ow- Shear30同心圆筒黏度计对 5 0例正常人体消化道黏液进行了流变学性能测试 ,获得了正常人体消化道黏液的流变学模型 ;实验结果表明 ,低剪切速率下大肠黏液的表观黏度大于小肠黏液及胃液 ,但消化道黏液的表观黏度均随剪切速率的增大而迅速下降 ,表现为剪切稀化性假塑性非牛顿流体 ;当剪切速率增大到一定程度后消化道黏液的表观黏度趋近一常数 。

To probe further into the viscosity of gastrointestinal mucus, the samples of gastrointestinal mucus were taken from fifty normal people and were tested with Low-Shear 30 viscometer, and then the viscosity model was obtained.The results indicated that the apparent viscosity of large intestine mucus is greater than that of small intestine and stomach. The gastrointestinal mucus is a kind of non-Newtonian fluid when its apparent viscosity rapidly decreases with the increase of shear rate. When the shear rate increase well enough, the apparent viscosity of gastrointestinal mucus becomes a constant,and the gastrointestinal mucus appears to be a Newtonian fluid.