Dymek A, Dymek L, Starczewska-Dymek L, Dymek T, Krzysztof N. Alergia. 2009.

Respiratory symptoms and pharyngolaryngeal dry as hoarseness, throat clearing, chronic cough, postnasal drip, asthma and laryngospasm can occur in patients suffering from laryngopharyngeal reflux (LPR). Typical Symptoms of GERD may not be present at all. There are no specific pathognomonic clinical or pathological findings allowing for clear diagnosis of LPR. Until recently, diagnostic tests existing lacked sensitivity and specificity sufficient to confirm the diagnosis of LPR. The Restech Dx-pH Measurement System is a new, highly sensitive and non-invasive device for detection of acid reflux in the posterior oropharynx. Advances in technology allow placement of the probe in the pharynx to detect liquid and gaseous both reflux events. Placement can be performed easily without the need for endoscopy and manometers. The probe is well tolerated. It does not interfere with eating, talking or sleeping.