<?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>1688-1249</journal-id>
<journal-title><![CDATA[Archivos de Pediatría del Uruguay]]></journal-title>
<abbrev-journal-title><![CDATA[Arch. Pediatr. Urug.]]></abbrev-journal-title>
<issn>1688-1249</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Uruguaya de Pediatría]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-12492006000300018</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Centellograma con DMSA en pacientes con infección urinaria]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Clavijo]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[D´Avila]]></surname>
<given-names><![CDATA[Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prego]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caggiani]]></surname>
<given-names><![CDATA[Marina]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de la República UDELAR Facultad de Medicina Clínica Pediátrica C]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2006</year>
</pub-date>
<volume>77</volume>
<numero>3</numero>
<fpage>313</fpage>
<lpage>316</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-12492006000300018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-12492006000300018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-12492006000300018&amp;lng=en&amp;nrm=iso"></self-uri></article-meta>
</front><body><![CDATA[   <basefont size="3">     <p align="left"><b><font face="Verdana" size="2">MONOGRAF&Iacute;A    <br>  </font></b><font color="#1f1a17" face="Verdana" size="2">Arch Pediatr Urug 2006; 77(3): 313-316</font></p>  <font face="Verdana" size="2">      <br>  </font>      <p align="left"><b><font color="#1f1a17" face="Verdana" size="4">Centellograma con DMSA en pacientes con infecci&oacute;n urinaria </font></b></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2">Dras. Roc&iacute;o Clavijo, Isabel D&acute;Avila    <br>  Tutores: Dres. Javier Prego, Marina Caggiani </font></p>  <font color="#1f1a17" face="Verdana" size="2">Cl&iacute;nica Pedi&aacute;trica &ldquo;C&rdquo; Prof. Dr. L. Peluffo. Facultad de Medicina de Montevideo. UDELAR. A&ntilde;o 1999.    <br>      <br>  </font>     <p align="left"><font color="#1f1a17" face="Verdana" size="2">Introducci&oacute;n </font></p>      ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> La relevancia de las infecciones del tracto urinario (ITU) en la pr&aacute;ctica pedi&aacute;trica diaria est&aacute; dada, por su frecuencia en este grupo etario, en la dificultad diagn&oacute;stica en el reci&eacute;n nacido y el lactante, la morbilidad potencial y las modificaciones en su evaluaci&oacute;n y tratamiento en el &uacute;ltimo decenio. En estudios realizados en la d&eacute;cada del 60; estudio Goteborg, Winberg y colaboradores </font> <font color="#1f1a17" face="Verdana" size="2"><sup>(<a name="1.."></a><a href="#1">1</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">, estimaron que 3% de las ni&ntilde;as y 1% de los varones cursaron una ITU sintom&aacute;tica en los primeros 10 a&ntilde;os de vida. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Datos m&aacute;s actuales evidencian un aumento franco, producto de la mayor sospecha de la ITU, mostrando valores de 7,8% en las ni&ntilde;as y 1,6% en los varones. &Eacute;stos surgen de un estudio de 3.556 ni&ntilde;os al ingreso escolar </font> <font color="#1f1a17" face="Verdana" size="2"><sup>(<a name="2.."></a><a href="#2">2</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Objetivos </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> 1.&nbsp;&nbsp;&nbsp;&nbsp;Analizar en forma descriptiva la metodolog&iacute;a de estudio de las infecciones urinarias de ni&ntilde;os internados, los motivos de solicitud del centellograma renal con &aacute;cido dimercaptosucc&iacute;nico marcado con Tc 99 (DMSA), y sus resultados. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> 2.&nbsp;&nbsp;&nbsp;&nbsp;En aquellos ni&ntilde;os con un DMSA positivo para pielonefritis aguda (PNA), valorar la conducta asumida respecto a nuevos estudios imagenol&oacute;gicos y quimioprofilaxis. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> 3.&nbsp;&nbsp;&nbsp;&nbsp;Comparar dos poblaciones, una con DMSA (-) y otro con DMSA (+), en b&uacute;squeda de factores de riesgo para da&ntilde;o renal. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Material y m&eacute;todo </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Se analizaron en forma retrospectiva las historias cl&iacute;nicas de ni&ntilde;os ingresados en la Cl&iacute;nica Pedi&aacute;trica &ldquo;C&rdquo; del Centro Hospitalario Pereira Rossell (CHPR) en el per&iacute;odo comprendido entre enero de 1996 a diciembre de 1998, que fueron dados de alta con diagn&oacute;stico de infecci&oacute;n urinaria o probable infecci&oacute;n urinaria. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Se realiz&oacute; el relevamiento de dichas historias en el archivo del Servicio antes mencionado, en el Archivo Central del CHPR, en el servicio de Medicina Nuclear del Hospital de Cl&iacute;nicas as&iacute; como su evoluci&oacute;n posterior en las Policl&iacute;nicas de Nefrolog&iacute;a del CHPR. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Se seleccionaron un total de 77 historias cl&iacute;nicas elabor&aacute;ndose un protocolo de recolecci&oacute;n de datos. </font></p>      ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> Las variables analizadas fueron: </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">Edad. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Sexo. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Peso y talla. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Motivo de consulta; dentro de este &iacute;tem: presencia de fiebre, su intensidad y duraci&oacute;n, datos de s&iacute;ndrome urinario bajo, s&iacute;ndrome urinario alto y repercusi&oacute;n general. Se consign&oacute; antibi&oacute;ticoterapia al ingreso. </font></li>      </ul>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Diagn&oacute;stico </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> <b>Infecci&oacute;n urinaria</b> es aquella que presenta bacteriuria significativa en el urocultivo: por aspiraci&oacute;n suprap&uacute;bica, proliferaci&oacute;n de un solo pat&oacute;geno urinario en cualquier n&uacute;mero; por cateterismo vesical un recuento mayor de 10 &ndash; 50.000 colonias/mm</font><font color="#1f1a17" face="Verdana" size="2"><sup>3</sup></font><font color="#1f1a17" face="Verdana" size="2"> de un solo pat&oacute;geno urinario; por chorro medio, un solo pat&oacute;geno urinario a raz&oacute;n de &gt; 100.000 colonias/mm</font><font color="#1f1a17" face="Verdana" size="2"><sup>3</sup></font><font color="#1f1a17" face="Verdana" size="2">. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> <b>Infecci&oacute;n urinaria probable</b> es la que, en ausencia de urocultivo (+), se presenta en un ni&ntilde;o con las siguientes caracter&iacute;sticas: </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">Reci&eacute;n nacido o lactante con fiebre sin foco cl&iacute;nico evidente, un examen de orina patol&oacute;gico y/o un centellograma renal con DMSA TC 99 con im&aacute;genes compatibles con el diagn&oacute;stico de pielonefritis aguda. </font></li>        ]]></body>
<body><![CDATA[<li><font color="#1f1a17" face="Verdana" size="2">Ex&aacute;menes de laboratorio: tirilla reactiva (consider&aacute;ndose patol&oacute;gico la presencia de esterarasas leucocitarias y/o nitritos), examen de orina (se consignaron como elementos patol&oacute;gicos leucocituria, piocituria, cilindros leucocitarios, microhematuria y/o proteinuria moderada), urocultivos (clasificados estos &uacute;ltimos seg&uacute;n n&uacute;mero, m&eacute;todo de recolecci&oacute;n, relaci&oacute;n con la antioticoterapia y germen hallado). En el hemograma, se consign&oacute; la presencia de leucocitosis menor de 5.000 y mayor de 15.000 elementos/mm</font><font color="#1f1a17" face="Verdana" size="2"><sup>3</sup></font><font color="#1f1a17" face="Verdana" size="2"> como elementos patol&oacute;gicos. Se valor&oacute; VES, PCR y cifras de creatinina y urea en sangre. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Dentro de la valoraci&oacute;n imagenol&oacute;gica: resultado de ecograf&iacute;a renal, cistouretrograf&iacute;a retr&oacute;grada radiol&oacute;gica y si &eacute;sta fue realizada bajo quimioprofilaxis. Centellograma renal con DMSA marcado con Tc 99 interesando en este estudio: </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Motivo de solicitud. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Tiempo en que fue realizado respecto al episodio infeccioso. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Im&aacute;genes compatibles con el diagn&oacute;stico de PNA, definidas como hipocaptaci&oacute;n del radiof&aacute;rmaco focal o difusa a nivel de la corteza renal sin evidencia de p&eacute;rdida de la estructura de la misma. Cicatriz renal, evidenciada como defecto en la captaci&oacute;n asociada con p&eacute;rdida del par&eacute;nquima renal funcionante, que puede ser afinamiento, aplanamiento del mismo y/o im&aacute;genes en hendiduras u hoz de la corteza renal </font>    <font color="#1f1a17" face="Verdana" size="2"><sup>(<a name="3.."></a><a href="#3">3</a>)</sup></font><font color="#1f1a17" face="Verdana" size="2">. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Tratamiento: se anot&oacute; duraci&oacute;n, v&iacute;a y f&aacute;rmaco. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Quimioprofilaxis: indicaci&oacute;n, cumplimiento, f&aacute;rmaco, tiempo y motivo de suspensi&oacute;n. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Se pesquis&oacute; la existencia de antecedentes familiares patol&oacute;gicos relacionados a la patolog&iacute;a de estudio y antecedentes personales patol&oacute;gicos de RVU, de ITU previas y quimioprofilaxis en curso. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Se registr&oacute; la evoluci&oacute;n en los 6 meses siguientes a la ITU estudiada. </font></li>      </ul>      ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> Resumen de resultados </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">La IU se present&oacute; con mayor frecuencia en menores de un a&ntilde;o (61%). </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">La distribuci&oacute;n fue similar en ambos sexos aunque con ligero predominio en el sexo femenino (56%). </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">La bacteriolog&iacute;a demostr&oacute; neto predominio de <i>Escherichia coli</i> (74%). </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Los datos de laboratorio que constaban en las historias cl&iacute;nicas fueron muy insuficientes e incompletos en la poblaci&oacute;n estudiada. Se cont&oacute; con resultados de examen de orina en el 80%, tirilla reactiva de orina en el 50%, VES en el 36%, PCR en el 28% y funci&oacute;n renal en el 54% de los pacientes. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Con respecto a los estudios imagenol&oacute;gicos: </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">La ecograf&iacute;a se realiz&oacute; en un 94% de la poblaci&oacute;n. Demostr&oacute; una baja sensibilidad para la detecci&oacute;n de pielonefritis aguda y uropat&iacute;as. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Se detect&oacute; un alto porcentaje (31%) de RVU en la poblaci&oacute;n, lo que jerarquiza la importancia de la realizaci&oacute;n de la CUG. Un alto porcentaje de pacientes (58%) no se realiz&oacute; la CUG luego del alta, lo que enfatiza el planteo de la realizaci&oacute;n de este examen intratratamiento con urocultivo negativo; previo a conceder el alta hospitalaria. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">El centellograma renal con DMSA se realiz&oacute; al 36% de la poblaci&oacute;n, no surgiendo de las historias realizadas un criterio definido para su solicitud. El centellograma con DMSA result&oacute; un arma &uacute;til de diagn&oacute;stico en casos de probable infecci&oacute;n urinaria en los que no se logr&oacute; aislar el germen por estar bajo antibioticoterapia o por errores en la t&eacute;cnica de recolecci&oacute;n y/o manejo de la muestra con urocultivos contaminados. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">El centellograma con DMSA es el &uacute;nico estudio que permite el diagn&oacute;stico definitivo de pielonefritis aguda. Los par&aacute;metros inespec&iacute;ficos de infecci&oacute;n demostraron baja especificidad. Un estudio centellogr&aacute;fico negativo no obvia la realizaci&oacute;n de la CUG, ya que hemos visto casos de DMSA (-) con RVU grado IV. </font></li>      ]]></body>
<body><![CDATA[</ul>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Conclusiones </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Dos hechos le confieren importancia a la infecci&oacute;n urinaria, m&aacute;s all&aacute; de su frecuencia: </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> a)&nbsp;&nbsp;&nbsp;&nbsp;Es un determinante potencial de da&ntilde;o renal irreversible. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> b)&nbsp;&nbsp;&nbsp;&nbsp;Es un hilo conductor hacia el diagn&oacute;stico de uropat&iacute;as en ni&ntilde;os. Ha sido demostrada su mayor frecuencia en menores de 2 a&ntilde;os. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Existe un riesgo aumentado de recurrencia de PA en los 6 meses subsiguientes al episodio inicial, sobre todo en los menores de 2 a&ntilde;os. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> La confiabilidad de par&aacute;metros cl&iacute;nicos y ex&aacute;menes de laboratorio para el diagn&oacute;stico de PA en lactantes y preescolares es escasa. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> En cuanto a la valoraci&oacute;n imagenol&oacute;gica: </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">La ecograf&iacute;a ha demostrado baja sensibilidad diagn&oacute;stica en PA y RVU. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">La CUG revela un bajo grado de cumplimiento en su realizaci&oacute;n como estudio ambulatorio, encontrado por otro lado un alto porcentaje de RVU en la poblaci&oacute;n con IU: 31%. </font></li>        ]]></body>
<body><![CDATA[<li><font color="#1f1a17" face="Verdana" size="2">El centellograma renal result&oacute; un estudio &uacute;til en nuestra poblaci&oacute;n de PIU sin confirmaci&oacute;n bacteriol&oacute;gica, no logr&aacute;ndose identificar factores de riesgo predictores de DMSA (+), encontr&aacute;ndose adem&aacute;s que existe un grupo de ni&ntilde;os con DMSA (-) en los que luego se encontr&oacute; RVU de grado moderado-severo. Tambi&eacute;n hay un alto porcentaje de ni&ntilde;os DMSA (+) con cicatrices renales sin RVU demostrable. </font></li>      </ul>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> En nuestra poblaci&oacute;n, ni&ntilde;os con PA demostrada por DMSA (+) no fueron controlados ni bacteriol&oacute;gica ni imagenol&oacute;gicamente, presumiblemente por dificultades en cuanto a su captaci&oacute;n. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Cabe destacar que el DMSA cumple con los criterios de &eacute;tica de realizaci&oacute;n de estudios imagenol&oacute;gicos, incluyendo aquellos referentes a costos (USD 100). </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Existe consenso en que un tratamiento antibi&oacute;tico temprano y evitar las recurrencias parece disminuir el riesgo de cicatrices renales. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Tomando en cuenta lo analizado nos preguntamos: </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">&iquest;Debe ser el DMSA solicitado ante todo paciente con IU? </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">&iquest;Su solicitud lleva impl&iacute;cito un sentido de decisi&oacute;n? </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Los hallazgos del DMSA, &iquest;pueden cambiar la conducta asumida frente a la necesidad de internaci&oacute;n, tratamiento ambulatorio, seguimiento imagenol&oacute;gico y quimioprofilaxis? Con este sentido, su realizaci&oacute;n incidir&iacute;a en la relaci&oacute;n costo-beneficio para la instituci&oacute;n y el paciente. </font></li>      </ul>      ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> Considerando que la informaci&oacute;n en la bibliograf&iacute;a revisada y el car&aacute;cter retrospectivo de nuestro estudio no nos permite dar respuesta a estos interrogantes, queremos dejar planteada la necesidad de un estudio prospectivo, basado en lo que nos parece un adecuado algoritmo de estudio. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> En todo paciente que ingresa con diagn&oacute;stico de sospecha de 1&ordf; infecci&oacute;n urinaria se realizar&aacute;: </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">Examen y tirilla reactiva en orina reci&eacute;n emitida, por chorro medio. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Urocultivo con antibiograma (dos muestras, extra&iacute;das por chorro medio, 1 por cateterismo vesical, o punci&oacute;n suprap&uacute;bica; previo al inicio de antibi&oacute;ticos). </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Funci&oacute;n renal. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Par&aacute;metros inespec&iacute;ficos de infecci&oacute;n (hemogramas con l&aacute;mina, VES, PCR). </font></li>      </ul>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Con respecto a la conducta imagenol&oacute;gica se discriminar&aacute;n los siguientes grupos etarios: </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Ni&ntilde;os de 2 a&ntilde;os o menos: </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">Ecograf&iacute;a renal y abdominal. </font></li>        ]]></body>
<body><![CDATA[<li><font color="#1f1a17" face="Verdana" size="2">Cistouretrograf&iacute;a miccional retr&oacute;grada radiol&oacute;gica durante la internaci&oacute;n intratratamiento intravenoso y previo urocultivo est&eacute;ril. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Centellograma renal con DMSA. </font></li>      </ul>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> De acuerdo a los hallazgos se tomar&aacute;n las siguientes decisiones: </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> 1.&nbsp;&nbsp;&nbsp;&nbsp;Paciente portador de RVU u otra uropat&iacute;a malformativa, independientemente de los hallazgos en el DMSA, al alta se indicar&aacute; quimioprofilaxis, se controlar&aacute; en policl&iacute;nica de nefrolog&iacute;a, se realizar&aacute;n urocultivos mensuales y centellograma renal de control a los 6 meses. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> 2.&nbsp;&nbsp;&nbsp;&nbsp;Pacientes que presentan DMSA positivo para PNA y una CUG sin reflujo demostrable; al alta se derivar&aacute; a Policl&iacute;nica de Nefrolog&iacute;a, controles con urocultivos mensuales, y se reiterar&aacute; el DMSA a los 6 meses. Con respecto a la quimioprofilaxis se subdividir&aacute; esta poblaci&oacute;n en dos grupos: </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> a)&nbsp;&nbsp;&nbsp;&nbsp;Uno de ellos se mantendr&aacute; bajo quimioprofilaxis los primeros 6 meses. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> b)&nbsp;&nbsp;&nbsp;&nbsp;El otro subgrupo servir&aacute; de grupo control.    <br>  Se valorar&aacute; el porcentaje de recurrencias en los ni&ntilde;os con DMSA (+) sin RVU que no reciban quimioprofilaxis. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> 3.&nbsp;&nbsp;&nbsp;&nbsp;Pacientes DMSA (-) que presentan CUG normal, al alta se controlar&aacute; con urocultivos mensuales, se reiterar&aacute; centellograma de presentar nueva IU en la evoluci&oacute;n. </font></p>      ]]></body>
<body><![CDATA[<p align="left"><font color="#1f1a17" face="Verdana" size="2"> Ni&ntilde;o mayor a 2 a&ntilde;os de edad que ingresa con cl&iacute;nica sugestiva de PNA: </font></p>  <ul>        <li><font color="#1f1a17" face="Verdana" size="2">Ecograf&iacute;a abdominal y renal. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">CUG, en iguales condiciones que el grupo anterior. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Centellograma renal con DMSA durante la internaci&oacute;n de presentar ecograf&iacute;a y/o CUG patol&oacute;gica. </font></li>        <li><font color="#1f1a17" face="Verdana" size="2">Se instaurar&aacute; quimioprofilaxis al alta a la poblaci&oacute;n que presente RVU o uropat&iacute;a malformativa.    <br>  A toda la poblaci&oacute;n se la controlar&aacute; con urocultivos mensuales y se realizar&aacute; centellograma con DMSA a los 6 meses para valorar posible existencia de cicatrices renales secundarias a la IU. </font></li>      </ul>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Se procurar&aacute; que los estudios imagenol&oacute;gicos sean realizados bajo supervisi&oacute;n del mismo equipo t&eacute;cnico. </font></p>      <p align="left"><font color="#1f1a17" face="Verdana" size="2"> Referencias bibliogr&aacute;ficas </font></p>      <!-- ref --><p align="left"><font color="#1f1a17" face="Verdana" size="2"><a name="1"></a> <a href="#1..">1</a>.&nbsp;&nbsp;&nbsp;&nbsp;<b>Amaral H. </b>Medicina nuclear en el diagn&oacute;stico de las enfermedades nefrourol&oacute;gicas no obstructivas de los ni&ntilde;os. 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