<?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>S2448-89092024000600427</article-id>
<article-id pub-id-type="doi">10.35366/119228</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Predicción de la desconexión de la ventilación mecánica invasiva mediante tomografía de impedancia eléctrica aplicando una red neuronal]]></article-title>
<article-title xml:lang="en"><![CDATA[Prediction of the weaning off invasive mechanical ventilation by electrical impedance tomography applying a neural network]]></article-title>
<article-title xml:lang="pt"><![CDATA[Previsão de desmame da ventilação mecânica invasiva por tomografia de impedância eletrica usando uma rede neural]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salvador Ibarra]]></surname>
<given-names><![CDATA[Ibzan Jahzeel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cadeza Aguilar]]></surname>
<given-names><![CDATA[Josué Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monasterios López]]></surname>
<given-names><![CDATA[Sergio Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos Ayala]]></surname>
<given-names><![CDATA[Martín Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Cárdenas]]></surname>
<given-names><![CDATA[Carmen Margarita]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nicolás Martínez]]></surname>
<given-names><![CDATA[Edith Lizeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Enfermedades Respiratorias, Ismael Cosío Villegas  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Obrero No. 1. La Paz  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Bolivia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>38</volume>
<numero>6</numero>
<fpage>427</fpage>
<lpage>432</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-89092024000600427&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-89092024000600427&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-89092024000600427&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  El éxito del retiro de la ventilación mecánica (VM) se define por la ausencia de soporte ventilatorio 48 horas después de la extubación; el tiempo de retiro puede representar hasta 50% del tiempo total de ventilación. La tomografía por impedancia eléctrica (TIE) es una herramienta de imagen clínica no invasiva y libre de radiación para monitorear, en tiempo real y a la cabecera del paciente.  Objetivo:  Comparar las diferencias en los cambios dinámicos del &#916;EELI y las regiones de interés (ROI) por TIE durante la prueba de ventilación espontánea en pacientes con éxito o falla durante el retiro de la ventilación mecánica invasiva.  Material y métodos:  Estudio observacional, longitudinal y analítico. Se incluyeron pacientes con requerimiento de ventilación mecánica invasiva por más de 72 horas. Se utilizó estadística descriptiva en las variables cuantitativas, expresando los datos como media y desviación estándar, o mediana y rango intercuartílico (RIC) acorde a la distribución, y como frecuencias y porcentajes en los datos categóricos. Posteriormente se realizó un análisis multivariado de regresión logística y una red neuronal (RN), ajustado para las variables con significancia clínica y estadística. La significancia estadística se estableció como una p &lt; 0.05 o &lt; 5%.  Resultados:  Se incluyeron un total de 30 pacientes, los cuales se dividieron en dos grupos: éxito o fracaso de la extubación. Se obtuvo significancia estadística entre ambos grupos en las variables: SOFA con p = 0.015, APACHE II con p = 0.005, leucocitos con p = 0.001 y magnesio con p = 0.035. La probabilidad predicha resultante de la regresión logística multivariable (RLM) y la RN para todo el grupo se utilizó para obtener curvas ROC y el valor de corte de -7.5 de perdida posterior a la prueba de respiración espontánea (PRE) del &#916;EELI ROI1.  Conclusión:  Los pacientes que son sometidos a una PRE presentan cambios en la capacidad residual funcional asociada a pérdida del reclutamiento de las áreas ventiladas previamente en la VM. Con el advenimiento de la TIE, estos cambios pueden ser monitorizados de manera dinámica y a la cabecera del paciente en tiempo real, ofreciendo una herramienta pronostica en aquellos pacientes con alto riesgo de fracaso al retiro de la ventilación mecánica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  Successful weaning from mechanical ventilation (MV) is defined by the absence of ventilatory support 48 hours after extubation; weaning time can represent up to 50% of the total ventilation time. Electrical impedance tomography (EIT) is a noninvasive, radiation-free clinical imaging tool to monitor, in real time and at the patient&#8217;s bedside.  Objective:  To compare the differences in dynamic changes of &#916;EELI and regions of interest (ROI) by EIT during spontaneous ventilation test in patients with success or failure during withdrawal of invasive mechanical ventilation.  Material and methods:  Observational, longitudinal and analytical study. Patients requiring invasive mechanical ventilation for more than 72 hours were included. Descriptive statistics were used for quantitative variables, expressing the data as mean and standard deviation, or median and interquartile range (IQR) according to the distribution, and as frequencies and percentages for categorical data. Subsequently, multivariate logistic regression (MLR) and neural network (NN) analysis was performed, adjusted for variables with clinical and statistical significance. Statistical significance was established as a p &lt; 0.05 or &lt; 5%.  Results:  A total of 30 patients were included and divided into two groups: extubation success or failure. Statistical significance was obtained between both groups in the variables: SOFA with a p = 0.015, APACHE II with a p = 0.005, leukocytes with a p = 0.001 and magnesium with a p = 0.035. The resulting predicted probability of MLR and NN for the whole group was used to obtain ROC curves and the cut-off value of -7.5 of post-SBT (spontaneous breathing trial) loss of &#916;EELI ROI1.  Conclusion:  Patients who undergo SBT present changes in functional residual capacity associated with loss of recruitment of previously ventilated areas on MV. With the advent of EIT, these changes can be monitored dynamically and at the patient&#8217;s bedside in real time, offering a prognostic tool in those patients at high risk of failure upon weaning from mechanical ventilation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo:  Introdução:  O desmame bem-sucedido da ventilação mecânica é definido pela ausência de suporte ventilatório 48 horas após a extubação; o tempo de desmame pode ser responsável por até 50% do tempo total de ventilação. A tomografia de impedância elétrica é uma ferramenta de imagem clínica não invasiva e livre de radiação para monitoramento em tempo real à beira do leito.  Objetivo:  Comparar as diferenças nas alterações dinâmicas do &#916;EELI e das regiões de interesse (ROI) por TIE durante o teste de ventilação espontânea em pacientes com sucesso ou fracasso durante o desmame da ventilação mecânica invasiva.  Material e métodos:  Estudo observacional, longitudinal e analítico. Foram incluídos pacientes que necessitaram de ventilação mecânica invasiva por mais de 72 horas. Foram usadas estatísticas descritivas para variáveis quantitativas, expressando os dados como média e desvio padrão, ou mediana e intervalo interquartil (IQR) de acordo com a distribuição, e como frequências e porcentagens para dados categóricos. Em seguida, foi realizada a regressão logística multivariada e a análise de rede neural, ajustadas para variáveis com significância clínica e estatística. A significância estatística foi estabelecida como p &lt; 0.05 ou &lt; 5%.  Resultados:  Um total de 30 pacientes foi incluído e dividido em dois grupos: sucesso ou fracasso da extubação. Foi obtida significância estatística entre os dois grupos nas variáveis: SOFA com p = 0.015, APACHE II com p = 0.005, leucócitos com p = 0.001 e magnésio com p = 0.035. A probabilidade prevista resultante da RLM e da RN para todo o grupo foi usada para obter curvas ROC e o valor de corte de -7.5 para perda pós-TRE da &#916;EELI ROI1.  Conclusão:  Os pacientes submetidos à TRE apresentam alterações na capacidade residual funcional associadas à perda de recrutamento de áreas previamente ventiladas na VM. Com o advento da TIE, essas alterações podem ser monitoradas dinamicamente e à beira do leito em tempo real, oferecendo uma ferramenta de prognóstico para os pacientes com alto risco de falha no desmame da ventilação mecânica.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[retiro de la ventilación mecánica]]></kwd>
<kwd lng="es"><![CDATA[tomografía de impedancia eléctrica]]></kwd>
<kwd lng="es"><![CDATA[prueba de respiración espontánea]]></kwd>
<kwd lng="es"><![CDATA[impedancia pulmonar al final de la espiración]]></kwd>
<kwd lng="en"><![CDATA[mechanically ventilation weaning]]></kwd>
<kwd lng="en"><![CDATA[electrical impedance tomography]]></kwd>
<kwd lng="en"><![CDATA[spontaneous breathing test]]></kwd>
<kwd lng="en"><![CDATA[end-expiratory lung impedance]]></kwd>
<kwd lng="pt"><![CDATA[retirada da ventilação mecânica]]></kwd>
<kwd lng="pt"><![CDATA[tomografia de impedância elétrica]]></kwd>
<kwd lng="pt"><![CDATA[teste de respiração espontânea]]></kwd>
<kwd lng="pt"><![CDATA[impedância pulmonar expiatória final]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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