n.括約肌
Some surgeries and drugs could lead to the sphincter of Oddi dysfunction. 某些外科手術或藥物會引起奧狄氏括約肌機能障礙。
If the sphincter does not work properly, stomach acid flows into the oesophagus. 如果括約肌不及時工作，胃酸就會進入食管。
