title: The clinical value of pharyngeal pH monitoring using a double-probe, triple-sensor catheter in patients with laryngopharyngeal reflux.
abstract: OBJECTIVE
  To determine the clinical value of pharyngeal pH monitoring for the diagnosis of laryngopharyngeal reflux (LPR) by using a double-probe, triple-sensor catheter in patients with symptoms of LPR.
  
  
  METHODS
  Prospective review of pH values recorded at the pharyngeal sensor, with the sensor placed in the proximal esophagus in patients with suspected LPR.
  
  
  METHODS
  Tertiary care university hospital.
  
  
  METHODS
  Thirty-three consecutive patients with symptoms of LPR.
  
  
  METHODS
  A pH test result was considered abnormal if a single reflux episode was detected in the hypopharynx and if, in the proximal esophagus, the total percentage of time the pH value was below 4 was 1.0% or higher. Data obtained from sensors were compared to determine the validity of pharyngeal sensor. Correlation between patients' reflux finding scores, reflux finding indexes, and reflux episodes were analyzed.
  
  
  RESULTS
  Of 33 patients, 17 had more than 1 reflux episode detected by the pharyngeal sensor and 19 had pathological reflux detected by the proximal esophageal sensor. Four patients who had pharyngeal reflux had a normal esophageal acid exposure time, and 6 patients who had pathological reflux detected by the proximal esophageal sensor did not experienced any pharyngeal reflux episode. Four patients would have had a false-negative test result and 6 subjects would have had a false-positive test result if a hypopharyngeal pH sensor was not implemented.
  
  
  CONCLUSIONS
  The adjustable, bifurcated, triple-sensor pH probe allows identifying true hypopharyngeal reflux episodes. If single-probe, double-sensor pH monitoring is to be performed, the proximal probe should be placed in the pharynx, not in the upper esophagus.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Ankara University Faculty of Medicine, Ankara, Turkey. togaymuderris@yahoo.com
authors.forename: Togay
authors.initials: T
authors.lastname: Muderris
authors.forename: M Kursat
authors.initials: MK
authors.lastname: Gokcan
authors.forename: Irfan
authors.initials: I
authors.lastname: Yorulmaz
mesh_terms: D000328:Adult; D000368:Aged; D002404:Catheterization; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007013:Hypopharynx; D008297:Male; D008875:Middle Aged; D018670:Monitoring, Ambulatory; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D010608:Pharyngeal Diseases / Q000175:diagnosis* / Q000503:physiopathology; D011446:Prospective Studies