21 March 2019 What is oesophageal pH monitoring? Oesophageal pH monitoring is a test whereby oesophageal acidity is quantified and the time of testing and duration of exposure of the oesophagus to predetermined acidity levels is determined. The purpose of this test is to identify and clarify: Gastroesophageal reflux problems; Changes in the normal oesophagus cleaning mechanisms. How is oesophageal pH monitoring performed? Oesophageal pH monitoring takes place over 24 hours on an out-patient basis. A fine probe with a sensor connected to a portable device for determining and recording pH is introduced through the nostrils. The probe is placed next to the lower oesophageal sphincter . The probe and the recording device are carried around by the person undergoing the test for the duration of the test. A form is also provided to record the following during the monitoring period: Time of test; Description of normal daily activities (meals, rest, etc.); Perception of symptoms. During the 24-hour monitoring period, the person should carry out their normal daily activities , They do not need to remain in the hospital. At the end of this period, they will return to the hospital for the probe and the recording system to be removed. Oesophageal pH monitoring is not painful. When is oesophageal pH monitoring carried out? It is always for the doctor to decide whether there is a need for a particular test, depending on the individual characteristics of each person and their complaints or illness. As a rule, oesophageal pH monitoring may be indicated in cases of: Gastroesophageal reflux disease; Difficulty swallowing; Chest pain. It can also be used: To help plan a surgical intervention; To determine the effectiveness of previous surgical intervention. How long does oesophageal pH monitoring take? Oesophageal pH monitoring is performed over a period of 24 hours. What are the limitations of oesophageal pH monitoring? Oesophageal pH monitoring is a technique that can miss lesions and diagnoses , even when the examination is carried out correctly. Are there any side effects, risks or complications associated with oesophageal pH monitoring? Oesophageal pH monitoring has no side effects, risks or complications. During and after the test, a burning sensation or the feeling of a foreign body in the throat can be felt; these are not significant issues and quickly disappear. This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.
