<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0188-9532</journal-id>
<journal-title><![CDATA[Revista mexicana de ingeniería biomédica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. ing. bioméd]]></abbrev-journal-title>
<issn>0188-9532</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Ingeniería Biomédica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-95322018000300249</article-id>
<article-id pub-id-type="doi">10.17488/rmib.39.3.4</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Sistema Vestible para la Detección Simultánea y No Invasiva del ECG y el Flujo Sanguíneo]]></article-title>
<article-title xml:lang="en"><![CDATA[Wearable System for Simultaneous and Noninvasive Detection of ECG and Blood Flow]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez-Lira]]></surname>
<given-names><![CDATA[O. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Chávez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cota-Ruiz]]></surname>
<given-names><![CDATA[J. D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Román]]></surname>
<given-names><![CDATA[J. D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sifuentes-De la Hoya]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Landaeta]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Ciudad Juárez  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>39</volume>
<numero>3</numero>
<fpage>249</fpage>
<lpage>261</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-95322018000300249&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-95322018000300249&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-95322018000300249&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se desarrolló un sistema vestible para la detección simultánea y no invasiva de dos señales provenientes de la actividad cardiaca: el ECG y el flujo sanguíneo. Se utilizaron dos electrodos secos para detectar la derivación I del ECG. La detección del flujo sanguíneo se realizó de forma no invasiva mediante un sensor magnetorresistivo tipo Túnel (TMR) basándose en la firma magnética de la sangre sobre un campo magnético constante proveniente de un imán permanente. Los electrodos, el sensor TMR y el imán se montaron en un brazalete tipo pulsera para la comodidad del usuario. La instrumentación desarrollada para detectar el ECG y el flujo sanguíneo se diseñó en base a una configuración diferencial con una relación de rechazo en modo común superior a 87 dB a 60 Hz y con una tensión de ruido de tal forma que las señales cardiacas presentaron una relación señal a ruido superior a 41 dB, siempre y cuando el sujeto no se mueva durante la medida. La calidad de las señales fue suficiente como para extraer información de dichas señales mediante algoritmos sencillos de implementar. El sistema propuesto es una alternativa a los sistemas vestibles presentados hasta ahora, del cual es posible valorar la salud cardiovascular del sujeto en ambientes no hospitalarios.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A wearable system was developed for the simultaneous and non-invasive detection of two signals from cardiac activity: the ECG and blood flow. Two dry electrodes were used to detect the lead I of the ECG. The detection of blood flow was performed non-invasively using a tunnel-magnetoresistance (TMR) sensor based on the magnetic signature of the blood over a constant magnetic field from a permanent magnet. The electrodes, the TMR sensor and the magnet were mounted on a wristband-type bracelet for the user comfort. The instrumentation developed to detect the ECG and blood flow was designed based on a differential configuration with a common-mode rejection ratio higher than 87 dB at 60 Hz and with a noise voltage in such a way that the cardiac signals presented a signal-to-noise ratio greater than 41 dB, as long as the subject stays still during the measurement. The quality of the signals was enough to extract information from these signals by means of simple to implement algorithms. The proposed system is an alternative to the wearable systems presented so far, from which it is possible to assess the cardiovascular health of the subject in non-hospital environments.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[sistema vestible]]></kwd>
<kwd lng="es"><![CDATA[ECG]]></kwd>
<kwd lng="es"><![CDATA[electrodos secos]]></kwd>
<kwd lng="es"><![CDATA[flujo sanguíneo]]></kwd>
<kwd lng="es"><![CDATA[sensor magnetorresistivo]]></kwd>
<kwd lng="en"><![CDATA[wearable system]]></kwd>
<kwd lng="en"><![CDATA[ECG]]></kwd>
<kwd lng="en"><![CDATA[dry electrodes]]></kwd>
<kwd lng="en"><![CDATA[blood flow]]></kwd>
<kwd lng="en"><![CDATA[magnetoresistive sensor]]></kwd>
</kwd-group>
</article-meta>
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