<?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>2448-8909</journal-id>
<journal-title><![CDATA[Medicina crítica (Colegio Mexicano de Medicina Crítica)]]></journal-title>
<abbrev-journal-title><![CDATA[Med. crít. (Col. Mex. Med. Crít.)]]></abbrev-journal-title>
<issn>2448-8909</issn>
<publisher>
<publisher-name><![CDATA[Colegio Mexicano de Medicina Crítica A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-89092023000100026</article-id>
<article-id pub-id-type="doi">10.35366/109959</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Índices de oxigenación como marcadores pronósticos en neumonía grave por SARS-CoV-2]]></article-title>
<article-title xml:lang="en"><![CDATA[Oxygenation indices as prognostic marker in severe pneumonia due to SARS-CoV-2]]></article-title>
<article-title xml:lang="pt"><![CDATA[Índices de oxigenação como marcadores prognósticos na pneumonia grave por SARS-CoV-2]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Buelna Gaxiola]]></surname>
<given-names><![CDATA[Fabiola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peniche Moguel]]></surname>
<given-names><![CDATA[Karla Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Díaz]]></surname>
<given-names><![CDATA[Jesús Salvador]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Pérez]]></surname>
<given-names><![CDATA[Natalia Itzel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Aguilar]]></surname>
<given-names><![CDATA[Fernando Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calyeca Sánchez]]></surname>
<given-names><![CDATA[María Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro Médico Nacional «Adolfo Ruiz Cortines» Hospital de Especialidades No. 14]]></institution>
<addr-line><![CDATA[Veracruz Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>37</volume>
<numero>1</numero>
<fpage>26</fpage>
<lpage>30</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-89092023000100026&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-89092023000100026&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-89092023000100026&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  a través de los índices de oxigenación valoramos la función del sistema respiratorio de oxigenación y ventilación.  Objetivo:  determinar el valor de los índices de oxigenación como factor de pronóstico para el desenlace en neumonía grave por SARS-CoV-2.  Material y métodos:  estudio retrospectivo, longitudinal, descriptivo, analítico. Se incluyeron pacientes &gt; 18 años con diagnóstico de neumonía por SARS-CoV-2 entre el 01 junio y el 31 de diciembre de 2020. Se clasificó a los pacientes de acuerdo al desenlace: sobreviviente o no sobreviviente. Se empleó estadística descriptiva y pruebas paramétricas y no paramétricas de acuerdo al caso, se construyeron curvas ROC (Receiver Operating Characteristic Curve) para determinar los puntos de corte de los gases arteriales con la mejor sensibilidad y especificidad y se determinó el área bajo la curva (ABC) para el desenlace fatal.  Resultados:  se incluyeron 175 pacientes, 70.3% correspondió al sexo masculino, la media de edad fue de 56 años (rango intercuartil 45-64). El grupo de sobrevivientes incluyó 51 pacientes y el grupo de no sobrevivientes 124 pacientes. Al analizar los gases arteriales al momento de ingresar a la unidad de cuidados intensivos sobresale la PaO2/FiO2 de 100 mmHg y el índice respiratorio (IR) &gt; 2.4 con un ABC de 0.694 y 0.722 respectivamente. A las 96 horas de ingreso destaca PaO2/FiO2 de 145 mmHg, el IR &gt;3 y la PaO2/PAO2 de 0.22 con un ABC de 0.846, 0.840 y 0.842 respectivamente.  Conclusión:  los gases arteriales medidos a las 96 horas de ingreso a la UCI son marcadores pronósticos para el desenlace fatal en la neumonía grave por SARS-CoV-2.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  oxygenation indices we assess the function of the respiratory system of oxygenation and ventilation.  Objective:  to determine the value of arterial gases as a prognostic factor for the outcome of patients with severe SARS-CoV-2 pneumonia.  Material and methods:  retrospective, longitudinal, descriptive, analytical study. We included patients &gt; 18 years with a diagnosis of SARS-CoV-2 pneumonia between 1 June and 31 December 2020. Patients were classified according to outcome: survivor or non-survivor. Descriptive statistics and parametric and non-parametric tests were used according to the case, ROC (Receiver Operating Characteristic Curve) curves were constructed to determine the cut-off points of arterial gases with the best sensitivity and specificity and the area under the curve (AUC) for the fatal outcome was determined.  Results:  we included 175 patients, 70.3% corresponded to the male sex, the mean age was 56 years (interquartile range 45-64). The survivor group included 51 patients and the non-survivor group 124 patients. When analyzing arterial gases at the time of admission to the ICU, paO2/FiO2 of 100 mmHg and respiratory index (RI) &gt; 2.4 with ABC 0.694 and 0.722 respectively. At 96 hours of admission, PaO2/FiO2 of 145 mmHg stands out, the RI &gt; 3 and the DA-aO2 of 0.22 with ABC 0.846, 0.840 and 0.842 respectively.  Conclusion:  arterial blood gases measured at 96 hours of ICU admission are prognostic markers for fatal outcome in severe SARS-CoV-2 pneumonia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo:  Introdução:  através dos índices de oxigenação avaliamos a função do sistema respiratório de oxigenação e ventilação.  Objetivo:  determinar o valor dos índices de oxigenação como fator prognóstico para o desfecho em pneumonia grave por SARS-CoV-2.  Material e métodos:  estudo retrospectivo, longitudinal, descritivo, analítico. Icluíram-se pacientes com mais de 18 anos de idade diagnosticados com pneumonia por SARS-CoV-2 entre 1º de junho e 31 de dezembro de 2020. Os pacientes foram classificados de acordo com o desfecho: sobreviventes ou não sobreviventes. Foram usadas estatística descritiva e testes paramétricos e não paramétricos de acordo com o caso, foram construídas curvas ROC (Receiver Operating Characteristic Curve) para determinar os pontos de corte da gasometria arterial com melhor sensibilidade e especificidade e determinou-se a área sob a curva (ABC) para o desfecho fatal.  Resultados:  incluíram-se 175 pacientes, 70.3% eram do sexo masculino, a média de idade foi de 56 anos (rango interquartil 45-64). O grupo sobrevivente incluiu 51 pacientes e o grupo não sobrevivente 124 pacientes. Na análise dos gases arteriais no momento da admissão na UTI, destacam-se a PaO2/FiO2 de 100 mmHg e o índice respiratório (IR) &gt; 2.4 com AUC 0.694 e 0.722 respectivamente. Às 96 horas de internamento destaca-se PaO2/FiO2 145 mmHg, IR &gt; 3 e PaO2/PAO2 de 0.22 com ABC 0.846, 0.840 e 0.842 respetivamente.  Conclusão:  os gases sanguíneos arteriais medidos 96 horas após a admissão na UTI são marcadores prognósticos para desfecho fatal em pneumonia grave por SARS-CoV-2.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[índices de oxigenación]]></kwd>
<kwd lng="es"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="es"><![CDATA[índice respiratorio]]></kwd>
<kwd lng="es"><![CDATA[neumonía]]></kwd>
<kwd lng="es"><![CDATA[gases arteriales]]></kwd>
<kwd lng="en"><![CDATA[oxygenation indices]]></kwd>
<kwd lng="en"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="en"><![CDATA[respiratory index]]></kwd>
<kwd lng="en"><![CDATA[pneumonia]]></kwd>
<kwd lng="en"><![CDATA[arterial gases]]></kwd>
<kwd lng="pt"><![CDATA[índices de oxigenação]]></kwd>
<kwd lng="pt"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="pt"><![CDATA[índice respiratório]]></kwd>
<kwd lng="pt"><![CDATA[pneumonia]]></kwd>
<kwd lng="pt"><![CDATA[gasometria arterial]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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