Pharyngo-esophageal reflux is monitored by:

Double probe pH monitoring - Pharyngo-esophageal reflux. Esophageal PH monitoring - GERD Barium esophagogram - Frequently performed to diagnose problems related to esophageal and pharynx that present with symptoms like dysphasia. Radionuclide scintigraphy - Radiotracer injected into vein that travels to specific organ and emits gamma rays as it decays which is then recorded using Gamma camera. Used to detect normal functionality of the organ.