Cordova-Fraga T, Sosa M, Wiechers C, Roca-Chiapas JMDL, Moreles AM, Bernal-Alvarado J, Huerta-Franco R. Effects of anatomical position on esophageal transit time: A biomagnetic diagnostic technique. World J Gastroenterol 2008; 14(37): 5707-5711 [PMID: 18837088 DOI: 10.3748/wjg.14.5707]
Corresponding Author of This Article
Jose Maria De la Roca-Chiapas, Instituto de Física, Universidad de Guanajuato, Loma del Bosque 103, Lomas del Campestre, León 37150, Gto., Mexico. joseroca@fisica.ugto.mx
Article-Type of This Article
Rapid Communication
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World J Gastroenterol. Oct 7, 2008; 14(37): 5707-5711 Published online Oct 7, 2008. doi: 10.3748/wjg.14.5707
Effects of anatomical position on esophageal transit time: A biomagnetic diagnostic technique
Teodoro Cordova-Fraga, Modesto Sosa, Carlos Wiechers, Jose Maria De la Roca-Chiapas, Alejandro Maldonado Moreles, Jesus Bernal-Alvarado, Raquel Huerta-Franco
Teodoro Cordova-Fraga, Modesto Sosa, Carlos Wiechers, Jose Maria De la Roca-Chiapas, Alejandro Maldonado Moreles, Jesus Bernal-Alvarado, Instituto de Física, Universidad de Guanajuato, León 37150, Gto., Mexico
Raquel Huerta-Franco, Instituto de Investigaciones sobre el Trabajo, Universidad de Guanajuato, León 37150, Gto., Mexico
Author contributions: Cordova-Fraga T and Sosa M designed the study; De la Roca-Chiapas JM and Huerta-Franco R wrote the manuscript; Wiechers C, Maldonado Moreles A and Bernal-Alvarado J contributed in data collection and conducted research; Huerta-Franco R and De la Roca-Chiapas JM contri-buted in analytic input and data analysis.
Supported by CONACYT grant, No. J51082
Correspondence to: Jose Maria De la Roca-Chiapas, Instituto de Física, Universidad de Guanajuato, Loma del Bosque 103, Lomas del Campestre, León 37150, Gto., Mexico. joseroca@fisica.ugto.mx
Received: May 10, 2008 Revised: August 11, 2008 Accepted: August 18, 2008 Published online: October 7, 2008
Abstract
AIM: To study the esophageal transit time (ETT) and compare its mean value among three anatomical inclinations of the body; and to analyze the correlation of ETT to body mass index (BMI).
METHODS: A biomagnetic technique was implemented to perform this study: (1) The transit time of a magnetic marker (MM) through the esophagus was measured using two fluxgate sensors placed over the chest of 14 healthy subjects; (2) the ETT was assessed in three anatomical positions (at upright, fowler, and supine positions; 90º, 45º and 0º, respectively).
RESULTS: ANOVA and Tuckey post-hoc tests demonstrated significant differences between ETT mean of the different positions. The ETT means were 5.2 ± 1.1 s, 6.1 ± 1.5 s, and 23.6 ± 9.2 s for 90º, 45º and 0º, respectively. Pearson correlation results were r = -0.716 and P < 0.001 by subjects’ anatomical position, and r = -0.024 and P > 0.05 according the subject’s BMI.
CONCLUSION: We demonstrated that using this biomagnetic technique, it is possible to measure the ETT and the effects of the anatomical position on the ETT.
