Fraser R, Schwizer W, Borovicka J, Asal K, Fried M
Department of Medicine, Royal Adelaide Hospital, Adelaide, South Australia.
Dig Dis Sci. 1994 Dec;39(12 Suppl):20S-23S. doi: 10.1007/BF02300363.
The motor mechanisms associated with gastric emptying of nutrient liquids are unclear. Gastric emptying and motility were determined in seven healthy volunteers using an MRI technique following ingestion of 500 ml of (1) 10% and (2) 25% dextrose labeled with 1 mM Gd-DOTA. Emptying was determined with transaxial scans and motility during fast coronal scans 1.2 sec apart. Emptying was slower after ingestion of 25% dextrose. Following both meals, proximal gastric diameter remained relatively constant, while antral contractile frequency and depth varied markedly. These variations were greater after 10% dextrose. These studies suggest that antral motility changes contribute to slowing of gastric emptying by nutrient meals.
与营养液胃排空相关的运动机制尚不清楚。在七名健康志愿者摄入500毫升分别用1毫摩尔钆喷酸葡胺标记的（1）10%和（2）25%葡萄糖后，采用磁共振成像（MRI）技术测定胃排空和动力。通过轴向扫描确定排空情况，在间隔1.2秒的快速冠状扫描期间测定动力。摄入25%葡萄糖后排空较慢。两餐之后，胃近端直径保持相对恒定，而胃窦收缩频率和深度变化显著。摄入10%葡萄糖后这些变化更大。这些研究表明，胃窦动力变化导致营养性食物的胃排空减慢。
