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Updated: Jun 13, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Radiographic demonstration of a wireless capsule pH monitor in the esophagus
1Department of Radiology, St. Vincent's Hospital and Medical Center, New York, NY 10011, USA. bjxraydoc@verizon.net
Abstract:
Monitoring of esophageal pH is a major component of the evaluation of gastroesophageal reflux disease. A recent innovation has led to the replacement of the intraluminal probe by a wireless capsule. This capsule is attached to the esophageal wall and transmits the appropriate data to a patient-worn receiver. After a short period of time the capsule detaches itself from the wall and is eliminated. We recently encountered a patient in which the capsule did not detach in a timely manner. It was imaged during a preoperative esophagogram.
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