<?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>S2448-89092021000600329</article-id>
<article-id pub-id-type="doi">10.35366/103719</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Medición de la vaina del nervio óptico mediante tomografía computarizada como predictor de mortalidad en pacientes con traumatismo craneoencefálico grave al ingreso a la Unidad de Cuidados Intensivos]]></article-title>
<article-title xml:lang="en"><![CDATA[Optic nerve sheath measurement through computerized scan as death predictor in patients with serious cranioencephalic trauma on entry to the Intensive Care Unit]]></article-title>
<article-title xml:lang="pt"><![CDATA[Medição da bainha do nervo óptico por tomografia computadorizada como preditor de mortalidade em pacientes com trauma cranioencefálico grave internados na Unidade de Terapia Intensiva]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Romero]]></surname>
<given-names><![CDATA[Karen Saraí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cantú Cárdenas]]></surname>
<given-names><![CDATA[Héctor Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Barba]]></surname>
<given-names><![CDATA[Christian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borbolla González]]></surname>
<given-names><![CDATA[Adán de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez Martínez]]></surname>
<given-names><![CDATA[Carlos Alberto]]></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 de Occidente Hospital de Especialidades]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>35</volume>
<numero>6</numero>
<fpage>329</fpage>
<lpage>335</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-89092021000600329&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-89092021000600329&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-89092021000600329&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[resumen está disponible en el texto completo]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  Traumatic brain injury (TBI) is a medical-surgical condition characterized by brain involvement secondary to a traumatic lesion. Patients with severe TBI are at high risk of mortality and this will depend on different factors such as the presence of intracranial hypertension, age, origin of the injury and score on the Glasgow coma scale. Measurement of the optic nerve sheath diameter (ONSD) appears to be a good indirect indicator of intercranial hypertension and therefore, a good predictor of mortality.  Objective:  To determine the most appropriate cut-off point, as well as the measurement of the ONSD usefulness as a prognostic indicator of mortality in patients with severe TBI in the Intensive Care Unit (ICU).  Material and methods:  This is an analytical, descriptive, and retrospective study. The universe of study consists of all the case/files with TBI. For the sample selection, all available records of patients with severe TBI sent to the ICU during the period from March 1 to August 31, 2021, will be included. Within the inclusion criteria patients with a Glasgow scale score of &lt; 8 points on entry and with a computerized scan done. The dependent variables to considerer are the outcome understood as death or survival of the patient, the days hospitalized in the ICU, the presence of complications; among the dependent variables is the diameter of the optic nerve sheath measured by computerized tomography. Intervening variables were also considered such as the presence of comorbidities and overweight/obesity, the age and sex of the patient. The project consisted of four phases: 1) request for authorization and access to files, 2) application of selection criteria, 3) performance of ONSD measurements and 4) creation of the database. Finally, once the database is formed, the statistical analysis will proceed; for the descriptive part, prevalence&#8217;s, means (standard deviation) and medians (percentiles) will be calculated for the variables by sex and by outcome, subsequently the diagnostic capacity of the ONSD will be analyzed through the area under the ROC curve (receiving operating characteristics) for the outcome. Afterwards the performance of this and other cut-off points are compared using the Youden index.  Results:  Sixty records of TBI patients admitted to the ICU were studied, 51 were men (85%), 45 patients survived (75%) and 15 patients died (25%). The average age was of 50.5 ± 10.6 years, the average Glasgow score on admission was 6.6 ± 1.6 points, the average BMI was 26.42 ± 4.10 kg/m2, and the average number of days spent in the ICU was 9.03 ± 6.4. The diameter of the optic nerve was not a predictor of mortality, but if the Glasgow coma scale was, with an AUC of 0.775 (95% CI: 0.648-0.901, p = 0.002), the best cut-off point was 7 with a sensitivity of 93% and specificity of 54%. The bivariate linear regression model points to low Glasgow coma score and long hospital stay as predictors of mortality.  Conclusions:  The results of this study infer that, consistent with current scientific evidence, the sociodemographic characteristics of our population are similar to those reported by other authors, with men over 50 years of age being the most affected by this entity. On the other hand, the measurement of the diameter of the optic nerve sheath has been considered a good prognostic indicator of intracranial hypertension, which in turn is associated with increased mortality. However, in the present study there is no association between the diameter of the optic nerve sheath and the prognosis of mortality.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo:  Introdução:  O traumatismo cranioencefálico (TCE) é uma condição médico-cirúrgica caracterizada por lesão cerebral secundária a uma lesão traumática. Pacientes com TCE grave apresentam alto risco de mortalidade e isso dependerá de diversos fatores, como presença de hipertensão intracraniana, idade, origem da lesão e pontuação na Escala de Coma de Glasgow. A medida do diâmetro da bainha do nervo óptico (DBNO) parece ser um bom indicador indireto de hipertensão intracraniana e, portanto, um bom preditor de mortalidade.  Objetivo:  Determinar o ponto de corte mais adequado, bem como a utilidade da medida do DBNO como indicador prognóstico de mortalidade em pacientes com TCE grave na Unidade de Terapia Intensiva.  Material e métodos:  Trata-se de um estudo analítico, descritivo e retrospectivo. O universo de estudo é composto por todos os prontuários de casos/pacientes com TCE grave. Para a seleção da amostra foram incluídos todos os prontuários disponíveis de pacientes com TCE grave encaminhados à Unidade de Terapia Intensiva no período de 1o de março a 31 de agosto de 2021, dentro dos critérios de inclusão foram considerados pacientes com escala de Glasgow &lt; 8 pontos na admissão e com uma tomografia computadorizada realizada. As variáveis &#8203;&#8203;dependentes consideradas são o desfecho entendido como óbito ou sobrevida do paciente, os dias de internação na UTI, a presença de complicações; dentro das variáveis &#8203;&#8203;independentes está o diâmetro da bainha do nervo óptico medido por tomografia computadorizada. Também foram consideradas variáveis &#8203;&#8203;intervenientes, como presença de comorbidades e sobrepeso/obesidade, idade e sexo do paciente. O projeto consistiu em três fases: a) Pedido de autorização e acesso aos prontuários, b) Aplicação dos critérios de seleção, c) Desenvolvimento da base de dados. Por fim, uma vez formada a base de dados, procedeu-se à análise estatística. Para a parte descritiva, foram calculadas as prevalências, médias (desvio padrão) e medianas (percentis) das variáveis &#8203;&#8203;por sexo e por desfecho. Posteriormente, a capacidade diagnóstica do DBNO foi analisada pela área sob a curva ROC (Receiving Operating Characteristics) para o resultado. Posteriormente, o desempenho deste e de outros pontos de corte foi comparado pelo índice de Youden.  Resultados:  Foram estudados 60 prontuários de pacientes com TCE que deram entrada na UTI, 51 eram homens (85%), 45 pacientes sobreviveram (75%) e 15 pacientes morreram (25%). A média de idade foi de 50.5 ± 10.6 anos, a média de Glasgow na admissão foi de 6.6 ± 1.6 pontos, a média de IMC foi de 26.42 ± 4.10 kg/m2 e a média de dias de internação na UTI foi de 9.03 ± 6.4. O diâmetro do nervo óptico não foi preditor de mortalidade, mas a Escala de Coma de Glasgow sim, com AUC de 0.775 (IC 95%: 0.648-0.901, p = 0.002), o melhor ponto de corte foi 7 com sensibilidade de 93% e especificidade de 54%. O modelo de regressão linear bivariada aponta para baixo escore de coma de Glasgow e longa permanência hospitalar como preditores de mortalidade.  Conclusões:  Os resultados deste estudo inferem que, de acordo com as evidências científicas atuais, as características sociodemográficas de nossa população são semelhantes às relatadas por outros autores, sendo os homens com aproximadamente 50 anos de idade os mais acometidos por essa entidade. Por outro lado, a medida do diâmetro da bainha do nervo óptico tem sido considerada um bom indicador prognóstico de hipertensão intracraniana, que por sua vez está associada ao aumento da mortalidade. No entanto, no presente estudo não há associação entre o diâmetro da bainha do nervo óptico e o prognóstico de mortalidade.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Diámetro de la vaina del nervio óptico]]></kwd>
<kwd lng="es"><![CDATA[tomografía computarizada]]></kwd>
<kwd lng="es"><![CDATA[traumatismo craneoencefálico grave]]></kwd>
<kwd lng="es"><![CDATA[escala de coma de Glasgow]]></kwd>
<kwd lng="en"><![CDATA[Optic nerve sheath diameter]]></kwd>
<kwd lng="en"><![CDATA[computed tomography]]></kwd>
<kwd lng="en"><![CDATA[severe head injury]]></kwd>
<kwd lng="en"><![CDATA[Glasgow coma scale]]></kwd>
<kwd lng="pt"><![CDATA[Diâmetro da bainha do nervo óptico]]></kwd>
<kwd lng="pt"><![CDATA[tomografia computadorizada]]></kwd>
<kwd lng="pt"><![CDATA[traumatismo cranioencefálico grave]]></kwd>
<kwd lng="pt"><![CDATA[escala de coma de Glasgow]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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