...The phenomenon in which gas (usually air) in the stomach refluxes out of the body through the mouth. When swallowing, a small amount of air enters the stomach, and when not in a recumbent position, it mainly accumulates in the fundus of the stomach (this is called a stomach bubble). Normally, intragastric pressure is about 10 mmHg higher than intraesophageal pressure, but because the lower esophageal sphincter contracts and tightly closes the esophageal outlet, reflux from the stomach to the esophagus does not occur. *Some terminology that refers to "stomach bubble" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…胃内の気体(通常は空気)が口腔を経て体外に逆流する現象。嚥下(えんげ)にともなって若干の空気が胃内に入り,臥位以外ではおもに胃底部に貯留する(これを胃泡stomach bubbleという)。ふつう胃内圧は食道内圧より約10mmHg高いが,下部食道括約筋が収縮して食道出口をしっかり閉じているので胃から食道への逆流はおこらない。… ※「stomach bubble」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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