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胃排空的生理学涉及到诸如营养素和药物的吸收、胃返流、呼吸道误吸等现象以及溃疡的发病机理。应用放射性同位素方法测定胃排空速度,可进一步了解有关疾病及治疗对胃排空的影响。胃排空生理液体的排空较固体为快,而固体要保留到大部分液体排空后才与剩余的液体一起排出。进入胃底的液体能触发由迷走神经传递的接纳性舒张。因此,胃底对液体的排空速度起了关键性作用,而固体食物的排空速度则有赖于胃窦的动力作用。当固体食物到达远侧胃部,在酸性消化液中,首先被研磨成2mm或更小的
Physiology of gastric emptying involves such things as absorption of nutrients and drugs, reflux of the stomach, aspiration of the respiratory tract, and the pathogenesis of ulcers. The use of radioisotope determination of gastric emptying speed, can be further understanding of the disease and treatment of gastric emptying. Emptying the Stomach Emptying Physiological fluid is faster than solid, and the solids are retained until most of the fluid is emptied before being discharged with the remaining fluid. Liquid entering the fundus triggers an accommodative diastolic transfer of the vagus nerve. Therefore, the gastric fundus on the liquid emptying rate played a key role, while the solid food evacuation rate depends on the antrum of the dynamic effect. When solid food reaches the distal stomach, it is first ground to 2 mm or less in acidic digestive juice