24 HOUR REFLUX IMPEDANCE MONITORING
This is a relatively new test of great advantage. Impedance monitoring can identify reflux of non-acidic or mildly-acidic material, which doesn’t appear on acid studies but also causes symptoms. This procedure may be recommended for a number of reasons including difficulty diagnosing conditions and failure of medication to eradicate symptoms. It is particularly helpful in throat symptoms and cough and evaluating the effectiveness of reflux medications. It is performed simultaneously with 24 hr pH study using a single complex fine catheter, containing pH and impedance sensors.
Results are calculated using computer algorithms.
- Wheeze bronchospasm
- Voice trouble (scratchy, hoarse, weak)
- Shortness of breath
The test detects regurgitation episodes of:
All of these can contribute to oesophageal or reflux symptoms
- Similar to acid studies, testing is performed over a fine swallowed tube.