Open AccessBiomagnetic techniques for evaluating gastric emptying, peristaltic contraction and transit time
Author(s) -
José María De la Roca-Chiapas,
Teodoro Córdova–Fraga
Publication year - 2011
Publication title -
world journal of gastrointestinal pathophysiology
Language(s) - English
Resource type - Journals
ISSN - 2150-5330
DOI - 10.4291/wjgp.v2.i5.65
Subject(s) - peristalsis , medicine , gastric emptying , reproducibility , gastrointestinal transit , stomach , transit time , scintigraphy , migrating motor complex , biomedical engineering , nuclear medicine , statistics , mathematics , transport engineering , engineering
Biomagnetic techniques were used to measure motility in various parts of the gastrointestinal (GI) tract, particularly a new technique for detecting magnetic markers and tracers. A coil was used to enhance the signal from a magnetic tracer in the GI tract and the signal was detected using a fluxgate magnetometer or a magnetoresistor in an unshielded room. Estimates of esophageal transit time were affected by the position of the subject. The reproducibility of estimates derived using the new biomagnetic technique was greater than 85% and it yielded estimates similar to those obtained using scintigraphy. This technique is suitable for studying the effect of emotional state on GI physiology and for measuring GI transit time. The biomagnetic technique can be used to evaluate digesta transit time in the esophagus, stomach and colon, peristaltic frequency and gastric emptying and is easy to use in the hospital setting.