S3111 Characterization of Gastric Contractility Using the Atmo Capsule: Differences in Contractile Amplitude Based on Gastric Phase and Transit Delay

Gastric contractions occur at a frequency of approximately 3 cycles per minute (cpm) in phase with gastric slow waves. These contractions occur at high amplitude in the fed state to aid digestion, and less frequently or at lower amplitudes in the fasted state, until progression toward phase III of the migrating motor complex. Weaker gastric contractions have been implicated in delayed gastric emptying. The Atmo Capsule possesses an onboard accelerometer that can detect contractions by measuring changes in capsule orientation. We analyzed the accelerometer data of the Atmo Capsule to interrogate its ability to measure gastric contractions in different gastric phases, and how they relate to delayed gastric transit.