 Recently, a new technique functional lumen imaging probe FLIP which is based on principle of impedance planimetry IP. The endoluminal FLIP EndoFLIP EF -100 system uses a multi-detector IP system to produce a 3-dimensional outline of a sphincter. EndoFLIP can measure tissue distensibility and geometric changes through volumetric distention with real-time images. The esophagogastric junction EGJ has been well studied using EndoFLIP, studies for assessment of pyloric function are lacking. 