Figure 1. FLIP topography plots.

Distension volume (top, blue line), and intra-balloon pressure (top, red line), and FLIP topography (bottom) from two patients are displayed. The position of the esophagogastric junction (EGJ) is noted by the white dashed lines. A) Repetitive, antegrade contractions are present and the EGJ-distensibility index (DI) at the 60-ml fill volume was 6.7 mm²/mmHg. The worst day of total acid exposure time (AET) was 4.9%. B) No esophageal contractility was induced and the EGJ-DI at the 60-ml fill volume was 4.7 mm²/mmHg. The worst day AET was 29%. Figure used with permission from the Esophageal Center at Northwestern.