Twenty four hour pH monitoring is a test which involves the insertion of a small flexible tube down your nose to your esophagus. The tip of the tube will lie a few inches above the entrance to your stomach. This area is called the lower esophageal sphincter. A portable recorder worn at your side will take measurements over a period of 24 hours. This test will be able to tell the relationship between your heartburn and the amount of stomach acid your esophagus is exposed to.

This test may require you to abstain from taking your acid suppressing medication. During the test you will be able to maintain your usual activity and diet. Once the time has been completed, you will return to have the catheter removed and the physician will interpret your results.

More information: http://my.clevelandclinic.org/health/diagnostics/hic_24-Hour_Esophageal_pH_Test 

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