What Is Esophageal pH Monitoring?
Esophageal pH monitoring in Delhi works by placing a thin catheter with a pH sensor through the nose into the lower esophagus, just above the junction with the stomach. The catheter connects to a small portable recorder that you carry for 24 hours. Unlike a single endoscopy, which only captures a moment-in-time view of the esophagus, this test continuously tracks acid exposure across a full day and night — including during meals, activity, and sleep — giving a much more complete picture of reflux patterns than a snapshot examination can.
When Is 24-Hour pH Metry Recommended?
Your gastroenterologist may recommend this GERD diagnosis test in Delhi in several situations:
Persistent Heartburn
For heartburn or chest discomfort that continues despite treatment with acid-reducing medications.
Normal Endoscopy with Reflux Symptoms
When endoscopy appears normal but GERD is still strongly suspected and needs confirmation.
Chronic Cough Acid Reflux Test in Delhi
To determine whether long-term cough, hoarseness, or throat irritation is related to acid reflux.
Non-Cardiac Chest Pain
For chest pain after heart-related causes have been ruled out and reflux is suspected.
GERD Test Before Surgery in Delhi
To confirm the diagnosis of GERD before planning anti-reflux procedures or surgery.
How the pH Metry Procedure Works
The pH metry procedure in Delhi is a simple outpatient test performed without sedation. This 24-hour acid reflux monitoring in Delhi continuously measures acid exposure in the lower esophagus while you go about your normal daily routine, helping your gastroenterologist accurately diagnose GERD and correlate reflux episodes with your symptoms:
- A thin, flexible catheter with a pH sensor is gently passed through the nose into the lower esophagus
- The catheter is connected to a small portable recorder that you carry throughout the day
- You continue your normal activities, including eating, working, and sleeping
- You record meal times, symptoms, and periods of lying down using the recorder
- The recorded information helps match symptoms with acid reflux episodes
- After 24 hours, the catheter is removed and the collected data is analyzed by your gastroenterologist
Preparing for the Test
Proper preparation helps ensure accurate results. Your gastroenterologist will provide specific instructions based on your condition and current medications before the procedure:
- Fast for several hours before the catheter is inserted, as instructed by your doctor
- You may be asked to stop acid-reducing medications such as proton pump inhibitors (PPIs) about a week before the test if untreated reflux is being assessed
- Continue your normal daily routine during the 24-hour recording period to obtain accurate results
- Inform your doctor about all current medications, allergies, or any nasal and sinus conditions before the procedure
- Wear comfortable clothing, as you will carry a small portable recording device throughout the test
- Carefully record your meals, symptoms, and sleeping times to help correlate reflux episodes with your daily activities
Understanding Your Results
After the 24-hour monitoring period, the recorded data is carefully analyzed to determine how often acid reflux occurred, how long each episode lasted, and whether the reflux episodes matched the symptoms you recorded:
- Measures the frequency and duration of acid reflux episodes
- Matches reflux events with your recorded symptoms
- Confirms whether GERD is responsible for your symptoms
- Helps determine the severity of acid reflux disease
- Guides decisions on medications, lifestyle changes, or anti-reflux procedures
- Identifies when symptoms may be caused by conditions other than acid reflux
24-Hour pH Metry in South Delhi
For residents of South Delhi, having 24-hour pH metry in South Delhi available close to home matters, since the test involves an initial catheter placement visit followed by a return visit 24 hours later to remove the catheter and review the recorded data. A clinic that isn't a long drive away makes both visits considerably easier to manage, especially while carrying the portable recorder through a full day of normal activity.
Delhi Gastro Care is based at Fortis Escorts Liver and Digestive Disease Institute, Okhla Road, and is accessible to patients across South Delhi neighbourhoods such as Okhla, Kalkaji, Nehru Place, Greater Kailash, Sarita Vihar, Jasola, and New Friends Colony.
pH Metry vs. Endoscopy vs. Esophageal Manometry
These three tests are often confused, since all three examine the esophagus but answer different questions.
| Feature | 24-Hour pH Metry | Upper GI Endoscopy | Esophageal Manometry |
|---|---|---|---|
| What it measures | Acid exposure over 24 hours | Visual appearance of the lining | Muscle contraction & swallowing function |
| Duration | 24 hours (worn continuously) | 15–30 minutes | 20–30 minutes |
| Sedation | Not required | Mild sedation | Not required |
| Best for | Confirming GERD, symptom correlation | Detecting visible damage, ulcers, Barrett's | Diagnosing swallowing or motility disorders |
Choosing a pH Metry Specialist in Delhi
Because the diagnostic value of this test depends heavily on correct catheter placement and careful correlation of the data with your actual symptoms, choosing a pH metry specialist in Delhi with specific experience in interpreting 24-hour reflux data — not just performing the procedure — makes a real difference to the accuracy of your diagnosis. The best doctor for pH metry in Delhi will review your recorded symptom diary alongside the acid-exposure data, rather than relying on the numbers alone.
A few things worth checking before your first visit:
- Verified medical qualification and registration in gastroenterology
- Experience interpreting pH metry results alongside symptom diaries, not just raw acid-exposure percentages
- Access to complementary diagnostics such as endoscopy and esophageal manometry under one team
- A clear explanation of what the results do and don't confirm
- Transparent guidance on medication changes needed before the test
At Delhi Gastro Care, Dr. (Brig) Pankaj Puri — Director of Gastroenterology & Hepatology at Fortis Escorts Liver and Digestive Diseases Institute, Okhla — offers comprehensive evaluation and management of GERD and other esophageal disorders using advanced diagnostic technologies including 24-hour pH metry, endoscopy, and esophageal manometry, alongside evidence-based, personalized treatment plans.
Frequently Asked Questions
Find answers to common questions about 24-hour esophageal pH monitoring, including the procedure, preparation, medications, and differences from endoscopy.
24-hour pH metry is a diagnostic test that continuously measures acid levels in the esophagus over a 24-hour period using a thin, flexible catheter. It helps confirm whether symptoms are caused by acid reflux and determines the severity of GERD.
The catheter placement may cause mild, temporary discomfort in the nose or throat, but the procedure does not require sedation. Most patients tolerate the test well and continue their normal daily activities without difficulty.
You will usually be asked to fast for several hours before the procedure. Depending on your condition, your doctor may also advise stopping acid-reducing medications for about a week before the test to obtain accurate results.
Yes. You are encouraged to eat, work, walk, and sleep as you normally would while wearing the portable recorder. Recording your meals, symptoms, and activities helps your doctor accurately match acid reflux episodes with your symptoms.
Endoscopy provides a visual look at the esophageal lining at a single point in time, while pH metry continuously measures acid exposure over 24 hours. The two tests answer different questions and are often used together for a complete evaluation.
It depends on why the test is being done. If your doctor is checking whether reflux is fully controlled on medication, you may continue it; if untreated reflux needs to be confirmed, you may be asked to stop PPIs about a week beforehand. Your gastroenterologist will give specific instructions.
Look for a gastroenterologist with verified credentials, experience correlating pH metry data with symptom diaries rather than raw numbers alone, and access to complementary tests such as endoscopy and esophageal manometry under one team.