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Gastroesophageal Reflux
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First introduced over 40 years ago, the 24-hour catheter-based pH studies have previously been found to be the gold standard in the diagnosis of gastro-oesophageal reflux disease (GORD). In 2003, the Bravo has revolutionised the study of GORD, allowing patients an improved comfort and ability to perform activities of daily living.
The backflow of gastric acid (acid exposure) in the oesophagus is monitored by a tiny pH sensor located in a capsule which is pinned temporarily to the wall of the oesophagus at the time of endoscopy. Normal measurements for acid exposure are established for 48-hour studies. However, the investigators' studies have shown that extending the duration of recording to 96 hours further improved the diagnostic yield for GORD in patients with negative 24-hour catheter-based tests
The 96-hour recording is the current standard of care, despite the lack of normal ranges for this duration of the recording. The basis for the diagnosis of GORD in 96-hours studies is based on the 48-hours normal controls. The objective of this study is to determine the normal values for oesophageal acid exposure using the wireless pH recording apparatus over 96 hours in asymptomatic healthy subjects with unrestricted activity and diet.
Start dates may differ between countries and research sites. The research team are responsible for keeping the information up-to-date.
The recruitment start and end dates are as follows:
You can take part if:
You may not be able to take part if:
This is in the inclusion criteria above
Below are the locations for where you can take part in the trial. Please note that not all sites may be open.
The study is sponsored by Guy's and St Thomas' NHS Foundation Trust
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