1. Esophageal Function Tests

Esophageal function tests are specialized diagnostic procedures used to evaluate how well the esophagus works. The esophagus is the muscular tube that carries food and liquids from the mouth to the stomach. Problems with esophageal movement or excessive acid reflux can lead to symptoms such as difficulty swallowing, chest discomfort, chronic cough, heartburn, or regurgitation. These tests help physicians understand how the esophageal muscles and valves function during swallowing and whether acid from the stomach is refluxing into the esophagus. By identifying the underlying cause of symptoms, doctors can develop targeted treatment plans for both children and adults experiencing esophageal disorders.

High-Resolution Manometry (HRM)

High-Resolution Manometry (HRM) is an advanced diagnostic test that evaluates the pressure and coordination of the muscles in the esophagus during swallowing. During the procedure, a thin, flexible catheter with multiple pressure sensors is gently passed through the nose into the esophagus. These sensors measure muscle contractions and pressure patterns as the patient swallows small amounts of water.

The information collected helps physicians assess how effectively the esophagus moves food toward the stomach and how well the lower esophageal sphincter (LES) — the valve between the esophagus and stomach — relaxes during swallowing. HRM is particularly useful in diagnosing conditions that affect esophageal motility, such as achalasia, esophageal spasms, and disorders caused by a weak or poorly functioning lower esophageal sphincter. This detailed pressure mapping allows specialists to accurately identify abnormalities in esophageal movement and guide appropriate treatment strategies.

24-Hour pH Monitoring

Twenty-four-hour pH monitoring is a widely used test to measure acid exposure in the esophagus over an extended period. The procedure involves placing a small probe in the esophagus that records acid levels continuously for 24 hours while the patient goes about normal daily activities. This test helps determine how often stomach acid flows back into the esophagus and how long these reflux episodes last.

In many cases, impedance-pH monitoring is combined with standard pH testing to provide a more comprehensive assessment. This advanced method detects both acid and non-acid reflux, allowing physicians to evaluate reflux episodes that may not be detected by traditional pH monitoring alone. By analyzing these results, healthcare providers can accurately diagnose gastroesophageal reflux disease (GERD) and assess the severity of reflux, which is essential for planning effective medical or lifestyle-based treatment approaches.