Gustafsson P M, Tibbling L
Dept. of Paediatrics, Faculty of Health Sciences, University Hospital, Linköping, Sweden.
Scand J Gastroenterol. 1988 Jan;23(1):91-4. doi: 10.3109/00365528809093854.
Two-level pH recording in the oesophagus was performed for 24 h in 28 healthy schoolchildren between 9.3 and 17.3 years of age, to obtain reference values for reflux studies. The pH probes were placed 5 and 15 cm above the lower oesophageal sphincter by means of the manometric technique. A standardized acid-free diet was given on the day of recording. A drop in pH to 4.0 or below was regarded as reflux. The normal upper limit of total reflux time was 1.0% at the lower oesophageal level. Mean reflux time was about three times shorter at the upper level than at the lower, which indicates the importance of exact positioning of the pH probe.
对28名9.3至17.3岁的健康学童进行了为期24小时的食管两级pH值记录，以获取反流研究的参考值。通过测压技术将pH探头放置在食管下括约肌上方5厘米和15厘米处。记录当天给予标准化的无酸饮食。pH值降至4.0或更低被视为反流。食管下部水平的总反流时间正常上限为1.0%。上部水平的平均反流时间比下部大约短三倍，这表明pH探头准确定位的重要性。
