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Updated: Jul 9, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
New method for long-term monitoring of intragastric pH
Shouko Ono1, Mototsugu Kato, Yuji Ono
1Division of Endoscopy, Hokkaido University Hospital Nishi-5, Kita-14, Kita-ku, Sapporo 060-8648, Japan.
Aim:
Consecutive monitoring of intragastric pH using the Bravo capsule.
Methods:
We put threads through a Bravo capsule and then affixed it to the gastric wall by endoscopic hemoclipping in seven subjects. Study data were uploaded to a computer via Datalink every 48 h. In this way, repeated monitoring of intragastric pH was undertaken.
Results:
All subjects were able to monitor gastric pH over a 1-wk period, and five for > 2 wk. No complications were encountered during the monitoring. After pH monitoring, we safely retrieved the capsule endoscopically.
Conclusion:
Clipping a Bravo capsule onto the gastric wall enabled long-term intragastric pH monitoring. This is a methodological report of pH monitoring over a period of > 2 wk.
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