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Abstract

A computerized method of determining the slow wave of a gastrointestinal tract comprising the steps of providing an ingestible capsule (20) having a pressure sensor (29), having a subject ingest the capsule, recording measurements from the pressure sensor as the capsule passes through the gastrointestinal tract of the subject, transmitting the measurements to a processor (31), conditioning the measurements (42) to provide pressure data as a function of a time interval (60), interpolating missing pressure data in the time interval (43), filtering the pressure data as a function of a desired bandpass (44), differencing the pressure data (45), windowing the pressure data (46), applying a sample size and an overlap between samples to segment the pressure data (47), applying a Fourier transform to the segmented pressure data to provide frequency pressure data (48), selecting an FFT frequency bandpass (49), computing power spectrum density of the transformed pressure data for the FFT bandpass (50), and plotting the transformed pressure data (53), whereby a dominate pressure frequency (70) correlating to a slow wave of at least a portion of the gastrointestinal tract is provided.

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