건강 성인에서 Dual Probe 를 이용한 24시간 보행성 식도pH 검사

Background/Aims: Ambulatory 24-hr esophageal pH monitoring is considered the gold standard for diagnosing gastroesophageal reflux disease (GERD). The aims of this study were to define normal value of proximal and distal esophageal pH monitoring in healthy Koreans and to determine pH criteria that optimally defines acid reflux in the proximal esophagus. Methods: Twenty-five healthy subjects underwent 24 hr ambulatory esophageal dual probe pH monitoring. The pH values of the proximal and distal esophagus were measured and ΔpH in the proximal esophagus was calculated. ΔpH was then used to determine the likelihood of a true reflux event. Results: In the proximal esophagus, the mean total fraction time at pH