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118 Krišjāņa Valdemāra Street, Riga, LV-1013

24-hour pH monitoring of the stomach and esophagus (measurement of stomach acidity and acid reflux)

A 24-hour pH monitoring test of the esophagus and/or stomach is a procedure used to determine how much stomach acid enters the esophagus or stomach over a 24-hour period.

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How to prepare

A 24-hour pH monitoring of the esophagus and/or stomach is a test used to determine how much stomach acid enters the esophagus or stomach over a 24-hour period.

The test is performed using a special probe that is inserted into the esophagus through the mouth during the procedure. A single-use pH-measuring capsule is attached to the esophageal mucosa and remains in the esophagus for at least 24 hours. Typically, the capsule detaches spontaneously from the esophageal wall within a few days after the test and is excreted naturally from the body in the stool. Most patients do not notice the capsule being excreted. In addition, the patient is given a small data-recording device to wear on their body.

During the test, the patient goes about their daily routine—eating, sleeping, and moving—while the device records episodes of acid reflux. This test is used to confirm a diagnosis of gastroesophageal reflux disease (GERD), determine its severity, and evaluate the effectiveness of treatment.

After the data recording device is returned to the clinic, a gastroenterologist evaluates the test results and prepares a report. A mild sensation of throat irritation may occur after the test.

The cost of the examination includes the pH monitoring test, upper endoscopy, and sedation.

How should I prepare for the exam?

Four weeks before the test:

  • Do not take antibiotics.

Two weeks before the test:

  • Do not take probiotics, magnesium, or omeprazole.
  • Do not take laxatives, stool softeners, or stool bulking agents. You should also avoid any tests that require bowel preparation, such as a colonoscopy or barium enema.

Two to three days before the test:

  • It is recommended to consume only the following foods and beverages: white bread, white rice, white potatoes, baked or grilled chicken or fish, water, and black coffee or tea without flavoring.
  • Do not eat or drink anything else—this may lead to inaccurate test results.
  • In particular, avoid beans, pasta, fiber-rich grains, and foods high in fiber.

The day before the test:

  • Have an early dinner (at least 14 hours before the test) consisting of rice and grilled or baked chicken or fish.
  • You should fast for 12 hours before the breath test begins. This means you must not eat or drink anything other than water.
  • You may continue taking your usual prescription medications with water. Please bring a list of all your prescription medications with you.

On the day of the test:

  • You must not eat or drink anything in the morning.
  • You may take your medications with a small amount of water. If you have diabetes that requires insulin or diabetes pills, ask your doctor if you should adjust your morning dose.
  • Brush your teeth before the test.
  • Before or during the test, do not eat, drink, chew gum or tobacco, smoke cigarettes, or use breath fresheners or candy.

Why choose us

We offer comprehensive digestive health care in one place and in a peaceful environment—from diagnosis to treatment and prevention.

The Best Experts in Digestive Health

We specialize specifically in the care of gastroenterology patients, combining our expertise in the stomach, liver, pancreas, intestines, and the microbiome.

Everything you need for gut health, all in one place

We provide a full range of diagnostic and treatment services under one roof—everything you need for your digestive health is available in one place.

A multidisciplinary team of specialists

We have gastroenterologists, hepatologists, endocrinologists, psychologists, nutritionists, neurologists, and other specialists who work together to provide a holistic approach to health.

A personalized approach for each patient

We will develop a personalized treatment plan that includes both medication and dietary and lifestyle changes.

We use state-of-the-art technology

You will receive accurate diagnosis and treatment based on the latest international guidelines and research, using state-of-the-art technology.

A calming and pleasant environment

The clinic offers a comfortable, peaceful, and welcoming environment that helps ease any anxiety you may feel before your examination. The thoughtfully designed interior, the professional attitude of our staff, and our compassionate communication will help you feel safe and supported.

Frequently asked questions

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How should I prepare for an endoscopy?

How should I prepare for a colonoscopy?

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