Roca-Chiapas JMDL, Cordova-Fraga T. Biomagnetic techniques for evaluating gastric emptying, peristaltic contraction and transit time. World J Gastrointest Pathophysiol 2011; 2(5): 65-71 [PMID: 22025978 DOI: 10.4291/wjgp.v2.i5.65]
Corresponding Author of This Article
Jose María De la Roca-Chiapas, PhD, Division of Health Sciences, Department of Psychology, University of Guanajuato, Blvd. Puente Milenio 1001, Fraccion del Predio San Carlos, C.P. 37670, Leon, Guanajuato, Mexico. josema_delaroca@yahoo.com.mx
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Editorial
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World J Gastrointest Pathophysiol. Oct 15, 2011; 2(5): 65-71 Published online Oct 15, 2011. doi: 10.4291/wjgp.v2.i5.65
Biomagnetic techniques for evaluating gastric emptying, peristaltic contraction and transit time
Jose María De la Roca-Chiapas, Teodoro Cordova-Fraga
Jose María De la Roca-Chiapas, Division of Health Sciences, Department of Psychology, University of Guanajuato, Campus Leon, C.P. 37670, Leon, Guanajuato, Mexico
Teodoro Cordova-Fraga, Department of Physical Engineering, University of Guanajuato, Campus Leon, 37150 Leon, Guanajuato, Mexico
Author contributions: De la Roca-Chiapas JM and Cordova- Fraga T designed the study, wrote the manuscript, conducted research and assisted with data analysis.
Supported by PROMEP Grant Ugto-PTC-183 and Ugto-CA-37
Correspondence to: Jose María De la Roca-Chiapas, PhD, Division of Health Sciences, Department of Psychology, University of Guanajuato, Blvd. Puente Milenio 1001, Fraccion del Predio San Carlos, C.P. 37670, Leon, Guanajuato, Mexico. josema_delaroca@yahoo.com.mx
Received: March 3, 2011 Revised: August 31, 2011 Accepted: September 7, 2011 Published online: October 15, 2011
Abstract
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.
