What is Manometry & pH Tests?
The esophagus is a muscular tube that connects your throat to your stomach. With each swallow it contracts and pushes food downward. A valve at the lower end stays closed except when you swallow, belch, or vomit. Manometry measures the pressures and pattern of those muscle contractions.
Why testing is performed
Abnormal contractions or a weak lower esophageal sphincter can cause pain, heartburn, or difficulty swallowing. Manometry diagnoses these motility conditions. pH studies measure acid exposure over 24–48 hours.
How to prepare
Do not eat or drink for six hours before the test. Many medications affect esophageal pressure—review every medicine with your clinician; some may be paused temporarily.
What to expect
Numbing cream is applied inside the nostril. A thin, lubricated tube is advanced through the nose into the stomach while you sip water. Pressures are recorded as the tube is withdrawn, usually over about 30 minutes. Mild sore throat or stuffy nose typically improves within hours. Resume meals and medicines unless instructed otherwise.
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