<?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>2007-4085</journal-id>
<journal-title><![CDATA[Revista mexicana de urología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. urol.]]></abbrev-journal-title>
<issn>2007-4085</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Urología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40852019000100003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores clínicos relacionados a sangrado en la nefrolitotomía percutánea]]></article-title>
<article-title xml:lang="en"><![CDATA[Clinical factors related to bleeding in percutaneous nephrolithotomy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calvo-Vázquez]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Rodríguez]]></surname>
<given-names><![CDATA[Baudelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Méndez]]></surname>
<given-names><![CDATA[Erick Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Aquino]]></surname>
<given-names><![CDATA[Ulises Cristóbal]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Arroyo]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Noyola]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Montor]]></surname>
<given-names><![CDATA[Jorge Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cantellano-Orozco]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco-Gahbler]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital General Dr. Manuel Gea González División de Urología ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</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>79</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40852019000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40852019000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40852019000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Determinar los factores asociados a la disminución de la hemoglobina y el hematocrito en NLPC  Materiales y métodos: Se incluyeron pacientes sometidos a NLPC, de enero de 2015 a enero de 2017, se analizaron los factores asociados con el sangrado, con la prueba de Levene, prueba de la t de Student y estadística inferencial.  Resultados: Un total de 69 pacientes fueron sometidos a NLPC. La disminución promedio de Hb 1.17g/dl y Hct 2.56% después de la operación. Los factores con significación estadística fueron: Diabetes Mellitus DM (Hb p= &lt; 0.001/Hct p=0.017), Hipertensión (p=0.007/p=0.050), morfología de la piedra (p=0.004/p=0.003), área de la piedra (p=0.003/p=0.003), número de tractos (p=0.002/p=0.012) y tiempo quirúrgico (p= &lt; 0.001/p=0.010). Cultivo positivo (p=0.030) y tamaño de piedra (p=0.028), solo significativo para la disminución del hematocrito. El 27.5% tuvo cirugía previa, el tamaño promedio de los litos fue de 3.26 cm, el cáliz inferior fue el que más se puncionó (78.3%), la longitud promedio del tracto fue de 8.41cm. Con un tiempo de corte quirúrgico de 140 min. En nuestro estudio, los pacientes con DM (RR=1.8, IC=1.4-2.3) e hipertensión (RR=2.12, IC=1.5-2.8) son el factor de riesgo relacionado con la disminución de Hb y Hct en NLPC, también morfología de litio (RR=1.9, IC=1.5-2.5), área de litio (RR=1.8, 1.19-2.7) y la técnica quirúrgica como número de tractos (RR=1.7, IC=1.4-2.1) y tiempo quirúrgico (RR=1.9, IC=1.3 -2.8).  Conclusiones: La NLPC es un procedimiento mínimamente invasivo para el tratamiento de litiasis renal, con una baja incidencia de hemorragia y una tasa de transfusión mínima. En nuestro estudio, del 2.9%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To determine the factors associated with the decrease in hemoglobin and hematocrit in percutaneous nephrolithotomy.  Materials and methods: Patients that underwent percutaneous nephrolithotomy within the time frame of January 2015 to January 2017 were included in the study. The factors associated with bleeding were analyzed using the Levene&#8217;s test, the Student&#8217;s t test, and inferential statistics.  Results: Sixty-nine patients underwent percutaneous nephrolithotomy. The mean decrease in hemoglobin and hematocrit after the procedure was 1.17 g/dl and 2.56%, respectively. The statistically significant factors were: diabetes mellitus (Hb, p &#8804; 0.001/Hct, p = 0.017), high blood pressure (p = 0.007/p = 0.050), stone morphology (p = 0.004/p = 0.003), stone area (p = 0.003/p = 0.003), number of tracts (p = 0.002/p = 0.012), and surgery duration (p &#8804; 0.001/p = 0.010). Positive culture (p = 0.030) and stone size (p=0.028) were significant only in relation to the decrease in hematocrit. A total of 27.5% patients had undergone previous surgery, mean stone size was 3.26 cm, the lower calyx was the most frequently punctured (78.3%), mean tract length was 8.41cm, and mean surgery duration cutoff time was 140 min. In our study, diabetes mellitus (RR = 1.8, CI = 1.4-2.3), high blood pressure (RR = 2.12, CI = 1.5-2.8), stone morphology (RR = 1.9, CI = 1.5-2.5), stone area (RR = 1.8, CI = 1.19-2.7), surgical technique and number of tracts (RR = 1.7, CI = 1.4-2.1), and surgery duration (RR = 1.9, CI = 1.3 -2.8) were the risk factors associated with decreased Hb and Hct values in percutaneous nephrolithotomy.  Conclusions: Percutaneous nephrolithotomy is a minimally invasive procedure for the treatment of kidney stones. In our study, the incidence of bleeding was low, and the transfusion rate was minimal, at 2.9%.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Percutaneous nephrolithotomy]]></kwd>
<kwd lng="en"><![CDATA[Hemoglobin]]></kwd>
<kwd lng="en"><![CDATA[Hematocrit]]></kwd>
<kwd lng="en"><![CDATA[bleeding]]></kwd>
<kwd lng="es"><![CDATA[Nefrolitotomia percutánea]]></kwd>
<kwd lng="es"><![CDATA[Hemoglobina]]></kwd>
<kwd lng="es"><![CDATA[Hematocrito]]></kwd>
<kwd lng="es"><![CDATA[sangrado]]></kwd>
</kwd-group>
</article-meta>
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