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- W1986926555 abstract "Abstract Objectives/Hypothesis: Laryngopharyngeal reflux (LPR) represents a challenging field. Therapeutic studies of proton pump inhibitors in LPR have shown mixed results. The Restech pH catheter (Respiratory Technology Corp., San Diego, CA) is a minimally invasive device for detection of oropharyngeal acid reflux. The aim of this study was to provide normative data using this device in both distal esophagus and oropharynx. Study Design: Prospective observational study. Methods: Normal volunteers were recruited to undergo pH monitoring. A custom made longer catheter was used to assess distal esophageal pH. Oropharyngeal pH catheter was placed at the level of uvula. The distribution of % time was summarized using the 5th, 25th, 50th (median), 75th, and 95th quantiles for pH < 6, pH < 5, and pH < 4 for both upright and supine positions. Results: A total of 20 normal, healthy volunteers underwent pH monitoring for 14 to 24 hours (median 20.5 hours). The 95th percentile for % total time pH < 4, pH < 5, pH < 6 for the distal esophageal pH catheter were 4.52%, 10.91%, and 42.99%, respectively. For the oropharynx pH probe, the 95th percentile for % total time pH < 4, pH < 5, and pH < 6 were 0.02%, 2.33%, and 21.41% respectively. The 95th percentile for number of reflux events for total pH < 4, pH < 5, and pH < 6 were 1.3, 8.1, and 128.0, respectively. Conclusions: Oropharyngeal acid reflux is an infrequent occurrence in healthy volunteers without LPR. The normative data for Restech pH catheter may now be compared to those with suspected LPR. Laryngoscope, 2009" @default.
- W1986926555 created "2016-06-24" @default.
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- W1986926555 date "2009-07-21" @default.
- W1986926555 modified "2023-10-16" @default.
- W1986926555 title "A new pH catheter for laryngopharyngeal reflux: Normal values" @default.
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- W1986926555 doi "https://doi.org/10.1002/lary.20282" @default.
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