<?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>2444-054X</journal-id>
<journal-title><![CDATA[Cirugía y cirujanos]]></journal-title>
<abbrev-journal-title><![CDATA[Cir. cir.]]></abbrev-journal-title>
<issn>2444-054X</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Cirugía A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2444-054X2019000100028</article-id>
<article-id pub-id-type="doi">10.24875/ciru.18000388</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Utilidad de la resonancia magnética dinámica para la evaluación de la inestabilidad disco-vertebral vs. la resonancia magnética estática]]></article-title>
<article-title xml:lang="en"><![CDATA[Utility of the dynamic magnetic resonance for the evaluation of disco-vertebral instability vs. static magnetic resonance]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paz-Gutiérrez]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zaragoza-Solís]]></surname>
<given-names><![CDATA[Sandra I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Gómez]]></surname>
<given-names><![CDATA[Ana S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz-García]]></surname>
<given-names><![CDATA[Gabriel V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Cisneros]]></surname>
<given-names><![CDATA[Arelhi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Avila]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Médico Puerta de Hierro Clínica de columna ]]></institution>
<addr-line><![CDATA[Zapopan ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital San Javier Clínica de columna ]]></institution>
<addr-line><![CDATA[Guadalajara ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Médico Puerta de Hierro Clínica de columna ]]></institution>
<addr-line><![CDATA[Zapopan ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Tecnológico y de Estudios Superiores de Monterrey Escuela de Medicina y Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[Zapopan ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional de Occidente Clínica de columna]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2019</year>
</pub-date>
<volume>87</volume>
<numero>1</numero>
<fpage>28</fpage>
<lpage>33</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2444-054X2019000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2444-054X2019000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2444-054X2019000100028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La resonancia magnética dinámica (RMd) es útil para evaluar la columna cervical inestable; evalúa componentes blandos de la columna cervical y movimientos dinámicos cervicales.  Objetivo: Describir y analizar la frecuencia de presentación de hernias discales con resonancia magnética estática (RMe) y comparar con la RMd.  Método: De diciembre de 2014 a febrero de 2016 se evaluaron pacientes con cervicalgia y sospecha de inestabilidad cervical. Se realizó un estudio observacional, descriptivo y transversal, en el que se analizaron imágenes obtenidas en flexión y extensión mediante un dispositivo compatible con la RM.  Resultados: 29 pacientes ingresaron al protocolo y 7 se excluyeron. Promedio de edad: 50 años. De los 22 pacientes, se evaluaron 154 discos intervertebrales, demostrando 52 hernias discales, y el 78% fueron protrusiones discales. Nivel más afectado: C5 (31%). Durante las maniobras dinámicas se demostró que 30 fueron inestables, mostrando modificación durante las maniobras de flexión y extensión; 22 hernias se mantuvieron estables. Cinco pacientes demostraron inestabilidad ósea de cuerpos vertebrales.  Conclusiones: La RMd puede utilizarse en nuestro medio, ya que el costo de adquisición es bajo y provee información para la evaluación de la inestabilidad del disco vertebral al mostrar hallazgos no visibles en la RMe. Se obtiene un riesgo relativo de 16 y una p &lt; 0.05.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Dynamic magnetic resonance imaging (dMR) is useful to evaluate the unstable cervical spine; it evaluates soft components of the cervical spine and dynamic cervical movements.  Objective: To describe and analyze the frequency of presentation of herniated discs with static MRI and compare with dMR.  Method: During December 2014 to February 2016, patients with cervicalgia and suspected cervical instability were evaluated. An observational, descriptive, cross-sectional study was performed, where images obtained in flexion and extension were analyzed using a device compatible with MRI.  Results: 29 patients entered the protocol, 7 were excluded. Average age: 50 years. Of the 22 patients, 154 intervertebral discs were evaluated, demonstrating 52 herniated discs, 78% were disc protrusions. Most affected level: C5 (31%). During the dynamic maneuvers it was shown that 30 were unstable, showing modification during the maneuvers of flexion and extension, 22 hernias remained stable. Five patients demonstrated bone instability of vertebral bodies.  Conclusions: The dMR can be used in our environment since the acquisition cost is low and provides information for the evaluation of spinal disc instability showing findings not visible in sMR. Obtaining a relative risk of 16 and p &lt; 0.05]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Resonancia magnética dinámica]]></kwd>
<kwd lng="es"><![CDATA[Resonancia magnética estática]]></kwd>
<kwd lng="es"><![CDATA[Inestabilidad disco vertebral]]></kwd>
<kwd lng="en"><![CDATA[Dynamic magnetic resonance]]></kwd>
<kwd lng="en"><![CDATA[Static magnetic resonance]]></kwd>
<kwd lng="en"><![CDATA[Vertebral disc instability]]></kwd>
</kwd-group>
</article-meta>
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