Several pH tests: Ph testing is a measure in "real time" of reflux. Bravo pH testing implants a probe on your esophagus and records how much time your esophagus is exposed to acid. An impedance pH probe on the other hand is a thin tube passed into your esophagus by nose, and it measures whatever moves upward into, or stay in, your esophagus (acid or base). Your gastroenterologist (gi doctor) performs either test.
Answered 1/12/2015
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