24-hour pH impedance monitoring
Also called pH study, Reflux monitoring
24-hour pH impedance monitoring measures how often acid and non-acid fluid flows back into the food pipe over a full day. A thin catheter records reflux while you eat and move normally. It confirms GERD when symptoms are unclear or medicines have not worked, and guides further treatment.
At a glance
- Duration
- 24 hours, at home
- Medicines
- Some acid medicines are stopped beforehand, as advised
What it involves
The test is especially useful for atypical reflux symptoms such as chronic cough, throat clearing or hoarseness, and before any anti-reflux procedure.
When it is recommended
- Reflux symptoms not responding to medicine
- Chronic cough or throat symptoms suspected to be reflux
- Assessment before anti-reflux surgery or procedures
Questions patients ask
Can I eat normally during the test?
Yes. You are asked to eat, work and sleep as usual, and to note meals and symptoms, so the test reflects a normal day.
Related care
Ask about 24-hour pH impedance monitoring
Book a consultation to find out whether this procedure is right for you.