PS01.054: GASTROESOPHAGEAL REFLUX DISEASE PHENOTYPES IN THE MODERN ERA: CLINICAL, ENDOSCOPIC, MANOMETRIC AND PH TESTING PROPERTIES

Abstract

Abstract Background Reflux phenotypes have classically been divided into supine, upright, and bipositional predominant reflux. Recent data on clinical, endoscopic, and manometric features in these patient groups are scant and most prior reports occurred prior to the advent of high resolution impedance manometry and prolonged wireless pH monitoring. We aimed to evaluate the distribution, demographic, manometric, and endoscopic characteristics of the reflux phenotypes in this modern era of testing. Methods Patients who had esophageal physiology testing at a single tertiary care center over a one year period were retrospectively reviewed for demographic, clinical, endoscopic, manometric and pH impedance data. We included consecutive patients who had undergone pH-impedance or wireless pH testing with an EGD within 6 months. Results 139 patients were included and 91 (65.5%) patients were women was mean age of 51.9 + /- 15.2 years and mean BMI of 29.1 + /- 6.4. The most common reflux pattern was bipositional (46% of patients), followed by supine (25%). Baseline characteristics, endoscopic and manometric data across groups are included in Table 1. Barrett's esophagus was most common in the non-acid group. Endoscopically, esophagitis was most common in the supine and bipositional groups. Manometric findings were similar across groups. Conclusion The epidemiology of GERD patients appears to be changing as evidenced by a higher mean BMI than in the largest prior study from 1999. Despite demographic changes in GERD and more widespread use of advanced esophageal physiology testing, the manometric and endoscopic characteristics of GERD phenotypes remains fairly similar. Disclosure All authors have declared no conflicts of interest.