Reliability of 24-hour oesophageal pH monitoring under standardized conditions

Scandinavian Journal of Gastroenterology
T Franzén, L Tibbling Grahn

Abstract

Twenty-four-hour pH monitoring is an investigation technique that can give both false-positive and false-negative results, depending on patient factors such as diet and different activities. The aim was to study the reproducibility of 24-h oesophageal pH monitoring under as standardized conditions as possible in patients with symptoms of gastro-oesophageal reflux disease. Antimony pH electrodes were used in 22 adult patients who were investigated twice, 6 weeks apart, under identical conditions. They were hospitalized and were served a standardized diet which had been tested to contain no lower than pH 5.0. Neither coffee nor smoking was allowed. The patients had to refrain from proton-pump inhibitors for 10 days and H2 blockers for 2 days prior to the investigation. The paired t test was used. There was no significant difference in total reflux time, upright or supine reflux time, or longest reflux periods between the two test occasions. However, there were discordant results in six patients who had normal total reflux time on one test occasion but pathological results on the other. Since the biological variability of gastro-oesophageal reflux is not negligible from time to time, a normal 24-h oesophageal pH test should be ass...Continue Reading

Citations

Aug 21, 2008·Journal of Gastrointestinal Surgery : Official Journal of the Society for Surgery of the Alimentary Tract·Sarah K ThompsonPeter G Devitt
Feb 18, 2011·Digestive and Liver Disease : Official Journal of the Italian Society of Gastroenterology and the Italian Association for the Study of the Liver·Cynthia WeberP Marco Fisichella
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Sep 2, 2017·Diseases of the Esophagus : Official Journal of the International Society for Diseases of the Esophagus·G CapovillaM Costantini

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