<?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>2306-4102</journal-id>
<journal-title><![CDATA[Acta ortopédica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta ortop. mex]]></abbrev-journal-title>
<issn>2306-4102</issn>
<publisher>
<publisher-name><![CDATA[Colegio Mexicano de Ortopedia y Traumatología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2306-41022016000600302</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Esterasa leucocitaria como prueba diagnóstica ante un proceso infeccioso articular de rodilla]]></article-title>
<article-title xml:lang="en"><![CDATA[Leukocyte esterase as a diagnostic tool for an infectious disease of the knee]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ceja-Picazo]]></surname>
<given-names><![CDATA[SU]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes-Figueroa]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera-Villa]]></surname>
<given-names><![CDATA[AH]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Salgado]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-González]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-García]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Atanasio]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,IMSS Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez» ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,IMSS Hospital de Traumatología Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez»]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,IMSS Hospital de Ortopedia Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez»]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,IMSS Hospital de Traumatología Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez»]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,IMSS Hospital de Traumatología Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez»]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,IMSS  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,IMSS Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez» Servicio de Rescate Osteoarticular]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>30</volume>
<numero>6</numero>
<fpage>302</fpage>
<lpage>306</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2306-41022016000600302&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2306-41022016000600302&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2306-41022016000600302&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  La infección articular es un reto ortopédico por su complejidad diagnóstica y efectos devastadores al no tratarse oportunamente. Contamos con diversos estudios de diagnóstico: cultivo, VSG, PCR, conteo de leucocitos, entre otros, pero ninguno es preciso, tardan más de 30 minutos en realizarse y requieren de infraestructura compleja. En este estudio determinamos la sensibilidad y especificidad de la esterasa leucocitaria para la detección de un proceso infeccioso articular en población mexicana.  Material y métodos:  Durante Noviembre de 2015 a Abril de 2016, se obtuvo líquido sinovial de pacientes con diagnóstico de infección articular con o sin implante, y de otros sin infección, con patología degenerativa de rodilla. Se evaluó la muestra mediante el test de esterasa leucocitaria COMBI-SCREEN 11SYS con lectura colorimétrica a los dos minutos; se determinó positivo para infección con dos cruces; el resto de la muestra fue enviado a cultivo.  Resultados:  Realizamos el test en 64 muestras de líquido sinovial de rodilla, 19 diagnosticadas con infección articular y 45 sin infección. Se obtuvo una sensibilidad de 100%, especificidad de 88.24%, VPP de 68.42% y VPN de 100%; índice de Kappa de .753.  Conclusiones:  La esterasa leucocitaria es una prueba eficaz para detectar un proceso infeccioso contra uno inflamatorio con alta probabilidad de acierto. Este estudio presentó un índice de concordancia Kappa de 0.753, con lo que demostró ser reproducible, por lo que recomendamos implementarlo en los servicios de urgencias a nivel nacional.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background: Articular infection is an orthopedic challenge due to its difficult diagnosis and devastating results. Various diagnostic studies exist: culture, ESR, CRP, count of leukocytes, among others, but none is specific, they all take more than 30 minutes to complete, and require complex infrastructure. In this study, we determine the sensitivity and specificity of the leukocyte esterase for detection of an infectious process joint in Mexican population.  Material and methods:  During November 2015 to April 2016, we obtained synovial fluid from two groups of patients: one with a diagnosis of synovial joint infection with or without implant, and the control group, without infection but with degenerative pathology of the knee. We evaluated the sample using the leukocyte esterase test COMBI-SCREEN 11SYS with colorimetric reading at two minutes; two crosses determined positive for infection; the remainder of the sample was sent for culture.  Results:  We performed the test in 64 samples of synovial fluid, 19 diagnosed with articular infection and 45 without it. We obtained a sensitivity of 100%, specificity of 88.24%, PPV of 68.42%, and NPV of 100%; Kappa index of .753.  Conclusions:  Leukocyte esterase is an effective test to detect an infectious process against an inflammatory one with a high probability of success. This study presented an index of agreement Kappa of 0.753, proving to be reproducible.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Artritis séptica]]></kwd>
<kwd lng="es"><![CDATA[esterasa leucocitaria]]></kwd>
<kwd lng="es"><![CDATA[rodilla]]></kwd>
<kwd lng="es"><![CDATA[infección]]></kwd>
<kwd lng="es"><![CDATA[artroplastía total de rodilla]]></kwd>
<kwd lng="es"><![CDATA[infección periprotésica]]></kwd>
<kwd lng="en"><![CDATA[Septic arthritis]]></kwd>
<kwd lng="en"><![CDATA[leukocyte esterase]]></kwd>
<kwd lng="en"><![CDATA[knee]]></kwd>
<kwd lng="en"><![CDATA[infection]]></kwd>
<kwd lng="en"><![CDATA[total knee replacement]]></kwd>
<kwd lng="en"><![CDATA[periprosthetic infection]]></kwd>
</kwd-group>
</article-meta>
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