<?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>S2007-40852018000100028</article-id>
<article-id pub-id-type="doi">10.24245/revmexurol.v78i1.1630</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Experiencia con las primeras 50 nefrolitotomías percutáneas efectuadas en un centro médico mexicano]]></article-title>
<article-title xml:lang="en"><![CDATA[Experience of the first fifty percutaneous nephrolithotomies performed at a Mexican medical center]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcaraz-Gutiérrez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pulido-Contreras]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Padilla]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medrano-Sánchez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos-Melgarejo]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,IMSS Centro Médico Nacional del Bajío ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,IMSS Centro Médico Nacional del Bajío ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2018</year>
</pub-date>
<volume>78</volume>
<numero>1</numero>
<fpage>28</fpage>
<lpage>33</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40852018000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40852018000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40852018000100028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Analizar la proporción de estado libre de cálculos renales en pacientes intervenidos de nefrolitotomía percutánea y comparar el tiempo de fluoroscopia entre las técnicas de dilatación en un solo paso versus progresiva.  Material y métodos: Estudio transversal y retrospectivo, efectuado en pacientes con diagnóstico de litiasis renal, intervenidos de nefrolitotomía percutánea en el Centro Médico Nacional del Bajío (León, Guanajuato), de septiembre de 2015 a diciembre de 2016. Se analizaron las características clínicas, resultados de laboratorio, hallazgos operatorios, complicaciones, días de estancia hospitalaria y éxito del tratamiento (identificación de un cálculo residual menor de 4 mm o su ausencia mediante nefroscopia o fluoroscopia). La correlación entre el tipo de dilatación y tiempo de fluoroscopia se analizó con la prueba t de Student. Se consideró estadísticamente significativo el valor de p &lt;0.05.  Resultados: Se estudiaron 50 pacientes: 18 (36%) hombres y 32 (64%) mujeres, con promedio de edad de 49.8 años. Características litiásicas: 48 (96%) pacientes tuvieron cálculo renal único, 2 (4%) litiasis múltiple y 19 (38%) litiasis coral. La efectividad de la nefrolitotomía reportó una proporción de estado libre de cálculo renal de 82% y litiasis residual de 18%. El tiempo de fluoroscopia fue menor con la técnica en un solo paso versus progresiva (p = 0.002).  Conclusión:  La nefrolitotomía percutánea es un procedimiento con alta tasa de éxito. La técnica de dilatación en un solo paso ofrece menor tiempo de fluoroscopia y es tan efectiva como la dilatación progresiva.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To analyze the stone clearance status resulting from percutaneous nephrolithotomy and compare fluoroscopy time between the one-shot and progressive dilation techniques.  Materials and methods: A retrospective, cross-sectional study was conducted on patients diagnosed with kidney stones that underwent percutaneous nephrolithotomy at the Hospital de Especialidades del Centro Médico Nacional del Bajío in León, Guanajuato, Mexico, within the time frame of September 2015 and December 2016. Clinical characteristics, laboratory results, surgical findings, complications, days of hospital stay, and treatment success (identification of residual stone under 4 mm or its absence, through nephroscopy or fluoroscopy) were evaluated. The correlation between the type of dilation and fluoroscopy time were analyzed using the Student&#8217;s t test. Statistical significance was set at a p &lt; 0.05.  Results: Fifty patients were included in the study: 18 (36%) men and 32 (64%) women. Mean patient age was 49.8 years. Stone characteristics: 48 (96%) patients had a single kidney stone; 2 (4%) patients had multiple kidney stones; and the stones in 19 (38%) cases were the staghorn variety. Percutaneous nephrolithotomy effectiveness was complete stone clearance of 82% and a residual stone rate of 18%. Fluoroscopy time was shorter with the one-shot technique versus progressive dilation (p = 0.002).  Conclusions: Percutaneous nephrolithotomy has a high success rate. One-shot dilation is as effective as progressive dilation and has a shorter fluoroscopy time.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Nefrolitotomía percutánea]]></kwd>
<kwd lng="es"><![CDATA[fluoroscopia]]></kwd>
<kwd lng="es"><![CDATA[técnicas de dilatación]]></kwd>
<kwd lng="es"><![CDATA[litiasis renal]]></kwd>
<kwd lng="en"><![CDATA[Percutaneous nephrolithotomy]]></kwd>
<kwd lng="en"><![CDATA[Fluoroscopy]]></kwd>
<kwd lng="en"><![CDATA[Dilatation techniques]]></kwd>
<kwd lng="en"><![CDATA[Renal lithiasis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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