High-Resolution Manometry (HRM)

High-resolution manometry is a sophisticated diagnostic procedure that provides detailed measurements of the pressure and coordinated movement of muscles throughout your oesophagus (food pipe) during swallowing. This advanced test uses a thin, flexible catheter equipped with multiple pressure sensors that is gently passed through your nose and positioned in the oesophagus.

During the procedure, you'll be asked to swallow small amounts of water whilst the catheter records precise pressure readings from various points along the oesophagus. The test creates a comprehensive "pressure map" that shows how effectively your oesophageal muscles contract and relax in sequence to move food and liquids from your mouth to your stomach.

This detailed analysis helps gastroenterologists identify various swallowing disorders, including achalasia (where the lower oesophageal sphincter fails to relax properly), oesophageal spasms, weak muscle contractions, or abnormal muscle coordination. The test is particularly valuable for patients experiencing difficulty swallowing, chest pain unrelated to heart problems, chronic heartburn, or regurgitation symptoms that haven't responded to standard treatments.

The procedure typically takes 30minutes and, whilst mildly uncomfortable, is generally well-tolerated and provides crucial information for determining the most appropriate treatment approach for your specific condition.

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What to Expect

During HRM, our trained specialists will guide you through each step to ensure your comfort. Here's what you can expect:

• A thin, soft catheter will be passed through your nose into your oesophagus. This catheter contains pressure sensors that measure esophageal muscle contractions when you swallow.
• Once the tube is in place, you will be asked to swallow small sips of water.
• The data obtained will then be transmitted to a computer for interpretation
• The test usually takes about 30 minutes.
• It is not painful, but you may feel some pressure, gagging, or watery eyes.

Pre-Procedure Instructions

To ensure accurate test results and your comfort during the procedure, please follow these preparation guidelines:

• Fasting: Do not eat or drink for 6 hours before your test.
• Medications: Most medicines can be continued. Your medication list will be reviewed and any medications that need to be discontinued will be discussed with you before the test.
• Clothing: No special clothing requirements.

Your doctor will advise if there are additional preparations required.

Post-Procedure Instructions

After the catheter is removed, most patients experience minimal discomfort and can resume normal activities immediately. Here's what to expect:

• You may have a mild sore throat, stuffy nose, or runny nose for a few hours.
• Eat and drink normally once the tube is removed.
• You may return to your usual activities right away.
• Seek medical help if: you develop persistent nosebleed, chest pain, difficulty breathing, or fever.

Frequently Asked Questions (FAQ)

How long does it take to get the manometry results?

Results from your manometry test are typically available within 1-2 weeks after the procedure. Your doctor will review the detailed pressure measurements and muscle coordination patterns recorded during the test, then schedule a follow-up appointment to discuss the findings and recommend appropriate treatment options based on your specific results.

Will the procedure hurt?

No, but it may feel a little uncomfortable.

Will I need to be sedated?

No, you will be awake. A numbing gel or spray may be used.

Can I go home after the procedure?

Yes, immediately after the test.

Estimated Costs

Indicated charges are estimates of the full price, and subsidies will depend on the individual. The information presented is accurate as of September 2025.

• Singaporeans (Private rates): $744.60 (before GST)
• Permanent residents and non-residents (Private rates): $967.98 (before GST)

If you have questions, please contact your doctor or the Gastrointestinal Function Unit (GIFU) before your test.