Investigation to diagnose the Laryngo pharyngeal reflux
Ans. (b) Dual Probe Impedance pH MonitoringRef: Shackelford Page 222/8th Edition* pH monitoring at the level of Pharynx is not helpful because the acid refluxed is neutralized by the Pharyngeal secretions.* Hence a Dual (Bifurcated) catheter measuring both pH and Impedance is used across Upper esophageal sphincter, thereby permitting detection of Pharyngeal reflux
Esophageal pH monitoring
Dual Probe Impedance pH monitoring
Barium Esophagogram
Scintigraphy
Oesophagus