University of Washington

N Mani Prakash

James A Nelson

Francis A Spelman

Margaret Heitkemper

Charles E Pope

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James D Rothermel

An apparatus ( ) and method of non-invasive monitoring of gut motility. An ingestible magnet ( M) is swallowed by the patient ( ) and then linear and rotational movement is directionally detected by an external compass ( ). In preferred form, movements of the magnet ( M) are recorded by a memory means ( ) and graphically presented ( ) over a period of predetermined time. An alternate embodiment includes multiple compasses (C C ) for directionally locating the magnet ( M) within the patient ( ).

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Seattle, WA, United States of America

N Mani Prakash