title: Wireless upper esophageal monitoring for laryngopharyngeal reflux (LPR).
abstract: OBJECTIVE
  To confirm feasibility of transnasal placement of a wireless pH-monitoring capsule in the upper esophagus, and to determine the positive predictive value of LPR and GERD signs and symptoms for diagnosis of LPR in patients with OSAHS.
  
  
  METHODS
  Prospective, nonrandomized, IRB-approved study of 89 OSAHS patients with and without symptoms and signs of LPR.
  
  
  METHODS
  After complete history including QOL survey and fiberoptic laryngoscopy, patients underwent transnasal placement of the pH-monitoring capsule and wireless data collection for 24 hours.
  
  
  RESULTS
  77 of 89 consecutive patients underwent successful placement of wireless pH-monitoring capsule (86.5% success rate) and completed the study. 55 (71.4%) OSAHS patients had positive pH studies. 10.4% of these patients reported no symptoms or signs of LPR, indicating occult disease.
  
  
  CONCLUSIONS
  Success rates of placement, tolerability, morbidity, and complications are excellent. Wireless upper esophageal pH monitoring is safe and effective for diagnosing LPR in patients with OSAHS.
authors.affiliation: Department of Otolaryngology and Bronchoesophagology, Rush University Medical Center, Chicago, IL, USA. hednnek@aol.com
authors.forename: Michael
authors.initials: M
authors.lastname: Friedman
authors.forename: Paul
authors.initials: P
authors.lastname: Schalch
authors.forename: Ramakrishnan
authors.initials: R
authors.lastname: Vidyasagar
authors.forename: Kedar A
authors.initials: KA
authors.lastname: Kakodkar
authors.forename: Narges
authors.initials: N
authors.lastname: Mazloom
authors.forename: Ninos J
authors.initials: NJ
authors.lastname: Joseph
mesh_terms: D000328:Adult; D050782:Esophageal pH Monitoring / Q000295:instrumentation*; D004945:Esophagoscopy / Q000379:methods*; D005240:Feasibility Studies; D005260:Female; D005764:Gastroesophageal Reflux / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D007013:Hypopharynx; D008297:Male; D008875:Middle Aged; D009296:Nasal Cavity; D011237:Predictive Value of Tests; D020181:Sleep Apnea, Obstructive / Q000150:complications