Int J Med Sci 2013; 10(11):1445-1450. doi:10.7150/ijms.4732 This issue

Research Paper

Respiratory Magnetogram Detected with a MEMS Device

Saul M. Dominguez-Nicolas1, Raul Juarez-Aguirre1, Agustin L. Herrera-May1, Pedro Garcia-Ramirez1, Eduard Figueras2, Edmundo A. Gutierrez-D.3, Jesus A. Tapia4, Argelia Trejo4, Elias Manjarrez4 ✉

1. Research Center for Micro and Nano Technology, Universidad Veracruzana, Calzada Adolfo Ruíz Cortines 455, 94294, Boca del Río, Ver., Mexico
2. Microelectronics Institute of Barcelona IMB-CNM, CSIC, Bellaterra, 08193, Spain.
3. Department of Electronics, Instituto Nacional de Astrofisica Optica y Electronica, INAOE, Puebla, Pue., Mexico.
4. Institute of Physiology, Benemerita Universidad Autonoma de Puebla, 14 Sur 6301, Colonia San Manuel, Apartado Postal 406, CP 72570, Puebla, Pue., Mexico.

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Dominguez-Nicolas SM, Juarez-Aguirre R, Herrera-May AL, Garcia-Ramirez P, Figueras E, Gutierrez-D. EA, Tapia JA, Trejo A, Manjarrez E. Respiratory Magnetogram Detected with a MEMS Device. Int J Med Sci 2013; 10(11):1445-1450. doi:10.7150/ijms.4732. Available from

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Magnetic fields generated by the brain or the heart are very useful in clinical diagnostics. Therefore, magnetic signals produced by other organs are also of considerable interest. Here we show first evidence that thoracic muscles can produce a strong magnetic flux density during respiratory activity, that we name respiratory magnetogram. We used a small magnetometer based on microelectromechanical systems (MEMS), which was positioned inside the open thoracic cage of anaesthetized and ventilated rats. With this new MEMS sensor of about 20 nT resolution, we recorded a strong and rhythmic respiratory magnetogram of about 600 nT.

Keywords: respiration, thoracic muscles, ribs, thoracic cage, magnetocardiogram, magnetometer.