Read N W
Scand J Gastroenterol Suppl. 1984;96:77-85.
Studies on the relevance of scintigraphy and breath hydrogen analysis to the measurement of small bowel transit time are outlined. The main dietary factor influencing small bowel transit time appears to be the level of unabsorbable carbohydrate. The rates of gastric emptying and small bowel transit seem to be largely independent of one another. A weak correlation exists between the time for 50% of a meal to enter the caecum and the contraction frequency of the upper jejunum. Unabsorbed food in the ileum may increase the period over which material remains in the small intestine. Absorption cannot be predicted from a knowledge of transit kinetics alone. Diarrhoea may arise if rapid small bowel transit causes unduly rapid entry of fluid into the colon. In the irritable bowel syndrome, accelerated small bowel transit occurs in patients with diarrhoea.
本文概述了闪烁扫描法和呼气氢分析与小肠转运时间测量相关性的研究。影响小肠转运时间的主要饮食因素似乎是不可吸收碳水化合物的水平。胃排空率和小肠转运率似乎在很大程度上相互独立。一餐中50%进入盲肠的时间与空肠上段的收缩频率之间存在微弱的相关性。回肠中未吸收的食物可能会延长物质在小肠内停留的时间。仅根据转运动力学知识无法预测吸收情况。如果小肠快速转运导致液体过度快速进入结肠，可能会引发腹泻。在肠易激综合征中，腹泻患者会出现小肠转运加速的情况。
