<?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>2072-8174</journal-id>
<journal-title><![CDATA[Revista del Nacional (Itauguá)]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Nac. (Itauguá)]]></abbrev-journal-title>
<issn>2072-8174</issn>
<publisher>
<publisher-name><![CDATA[Hospital Nacional (Itauguá)]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2072-81742013000100003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prevalencia y características clínicas de la nefropatía diabética]]></article-title>
<article-title xml:lang="en"><![CDATA[Prevalence and clinical characteristics of diabetic nephropathy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortega Filártiga]]></surname>
<given-names><![CDATA[Edgar Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Ministerio de Salud Publica y Bienestar social Hospital Nacional Departamento de Urgencias Adultos]]></institution>
<addr-line><![CDATA[Itauguá ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2013</year>
</pub-date>
<volume>5</volume>
<numero>1</numero>
<fpage>18</fpage>
<lpage>27</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2072-81742013000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2072-81742013000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2072-81742013000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Introdución: entre 20 y 40% de los diabéticos tipo 2 (DM 2) desarrollarán nefropatía diabética a lo largo de la evolución de su enfermedad, dependiendo de factores de riesgo asociados: genéticos, grado de control de la glicemia, tratamiento apropiado de la presión arterial, dislipidemia, tabaquismo, microalbuminuria o su progresión hacia proteinuria manifiesta, todo los cuales marcarán la evolución hacia la nefropatía establecida. Objetivos: determinar la prevalencia de la nefropatía diabética y describir sus características clínicas. Materiales y métodos: diseño observacional descriptivo de corte transverso. Fueron estudiados 148 adultos con DM 2 internados en el Departamento de Urgencias Adultos del Hospital Nacional (Itauguá) desde el 1&deg; de enero de 2012 hasta el 31 de julio de 2012. Muestreo no probabilístico de casos consecutivos. Resultados: la edad media de los pacientes fue 61±11 años, predominó el sexo femenino 77 (52%). Se halló nefropatía en 62 pacientes (42%). La media de la proteinuria de 24 horas fue 904±90 mg y la del clearance de creatinina fue 74±48 ml/min. En cuanto al control metabólico, sólo 13 pacientes (21%) presentaban buen control metabólico. La media de HbA1c fue 10,4±4,3% y la de la glicemia fue 199±72 mg/dL. Los factores de riesgo asociados fueron: hipertensión arterial 53%, dislipidemia 41%, tabaquismo 23%. El filtrado glomerular fue menor a 60 ml/min en 50 pacientes (19%). Conclusiones: la prevalencia de nefropatía diabética fue elevada, se detectó mal control metabólico, elevadas cifras de presión arterial, así como también alto porcentaje de factores de riesgo para desarrollar nefropatía diabética: dislipidemia y tabaquismo. La incidencia de la nefropatía fue aumentando en relación a los años de evolución de la diabetes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Introdution: between 20 and 40% of type 2 diabetes (DM2) diabetic nephropathy develop over the course of the illness, depending on risk factors: genetic, degree of glycemic control, appropriate treatment of blood pressure, dyslipidemia, smoking, microalbuminuria or progression to overt proteinuria, all of which mark the evolution to overt nephropathy. Objetives: to determine the prevalence of diabetic nephropathy and describe their clinical characteristics. Materials and methods: descriptive observational design transverse. We studied 148 adults with DM 2 boarding in the Adult Emergency Department National Hospital (Itauguá) from 1 January 2012 to 31 July 2012. Non-probability sampling of consecutive cases. Results: the average age of the patients was 61 ± 11 years, 77 were females (52%). Nephropathy was found in 62 patients (42%). The mean 24-hour proteinuria was 904 ± 90 mg and creatinine clearance was 74±48 ml / min. In terms of metabolic control, only 13 patients (21%) had good metabolic control. The mean HbA1c was 10.4 ± 4.3% and blood glucose level was 199 ± 72 mg / dL. The risk factors were hypertension 53%, dyslipidemia 41%, smoking 23%. Glomerular filtration rate was less than 60 ml / min in 50 patients (19%). Conclusions: the prevalence of diabetic nephropathy was high, was detected poor metabolic control, high blood pressure, as well as high percentage of risk factors for developing diabetic nephropathy: dyslipidemia and smoking. The incidence of nephropathy was increased in relation to years of diabetes evolution.]]></p></abstract>
</article-meta>
</front><body><![CDATA[ <p align="right"><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><b>ART&Iacute;CULO ORIGINAL</b></font></p>     <p align="right">&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Prevalencia y caracter&iacute;sticas cl&iacute;nicas de la nefropat&iacute;a diab&eacute;tica</b></font></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Prevalence and clinical characteristics of diabetic nephropathy</b></font></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Edgar Augusto Ortega Fil&aacute;rtiga<sup><a href="#corres">1</a><a name="autor"></a></sup></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p> <hr size "1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>RESUMEN</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Introduci&oacute;n: entre 20 y 40% de los diab&eacute;ticos tipo 2 (DM 2) desarrollar&aacute;n nefropat&iacute;a diab&eacute;tica a lo largo de la evoluci&oacute;n de su enfermedad, dependiendo de factores de riesgo asociados: gen&eacute;ticos, grado de control de la glicemia, tratamiento apropiado de la presi&oacute;n arterial, dislipidemia, tabaquismo, microalbuminuria o su progresi&oacute;n hacia proteinuria manifiesta, todo los cuales marcar&aacute;n la evoluci&oacute;n hacia la nefropat&iacute;a establecida. Objetivos: determinar la prevalencia de la nefropat&iacute;a diab&eacute;tica y describir sus caracter&iacute;sticas cl&iacute;nicas. Materiales y m&eacute;todos: dise&ntilde;o observacional descriptivo de corte transverso. Fueron estudiados 148 adultos con DM 2 internados en el Departamento de Urgencias Adultos del Hospital Nacional (Itaugu&aacute;) desde el 1&deg; de enero de 2012 hasta el 31 de julio de 2012. Muestreo no probabil&iacute;stico de casos consecutivos. Resultados: la edad media de los pacientes fue 61±11 a&ntilde;os, predomin&oacute; el sexo femenino 77 (52%). Se hall&oacute; nefropat&iacute;a en 62 pacientes (42%). La media de la proteinuria de 24 horas fue 904±90 mg y la del clearance de creatinina fue 74±48 ml/min. En cuanto al control metab&oacute;lico, s&oacute;lo 13 pacientes (21%) presentaban buen control metab&oacute;lico. La media de HbA1c fue 10,4±4,3% y la de la glicemia fue 199±72 mg/dL. Los factores de riesgo asociados fueron: hipertensi&oacute;n arterial 53%, dislipidemia 41%, tabaquismo 23%. El filtrado glomerular fue menor a 60 ml/min en 50 pacientes (19%). Conclusiones: la prevalencia de nefropat&iacute;a diab&eacute;tica fue elevada, se detect&oacute; mal control metab&oacute;lico, elevadas cifras de presi&oacute;n arterial, as&iacute; como tambi&eacute;n alto porcentaje de factores de riesgo para desarrollar nefropat&iacute;a diab&eacute;tica: dislipidemia y tabaquismo. La incidencia de la nefropat&iacute;a fue aumentando en relaci&oacute;n a los a&ntilde;os de evoluci&oacute;n de la diabetes.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Palabras clave: Diabetes, nefropat&iacute;a diab&eacute;tica.</font></p> <hr size "1" noshade>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ABSTRACT</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Introdution:</b> between 20 and 40% of type 2 diabetes (DM2) diabetic nephropathy develop over the course of the illness, depending on risk factors: genetic, degree of glycemic control, appropriate treatment of blood pressure, dyslipidemia, smoking, microalbuminuria or progression to overt proteinuria, all of which mark the evolution to overt nephropathy. <b>Objetives:</b> to determine the prevalence of diabetic nephropathy and describe their clinical characteristics. Materials and methods: descriptive observational design transverse. We studied 148 adults with DM 2 boarding in the Adult Emergency Department National Hospital (Itaugu&aacute;) from 1 January 2012 to 31 July 2012. Non-probability sampling of consecutive cases. Results: the average age of the patients was 61 ± 11 years, 77 were females (52%). Nephropathy was found in 62 patients (42%). The mean 24-hour proteinuria was 904 ± 90 mg and creatinine clearance was 74±48 ml / min. In terms of metabolic control, only 13 patients (21%) had good metabolic control. The mean HbA1c was 10.4 ± 4.3% and blood glucose level was 199 ± 72 mg / dL. The risk factors were hypertension 53%, dyslipidemia 41%, smoking 23%. Glomerular filtration rate was less than 60 ml / min in 50 patients (19%). Conclusions: the prevalence of diabetic nephropathy was high, was detected poor metabolic control, high blood pressure, as well as high percentage of risk factors for developing diabetic nephropathy: dyslipidemia and smoking. The incidence of nephropathy was increased in relation to years of diabetes evolution.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Keywords: diabetes, debetic nephropathy.</font></p> <hr size "1" noshade>      <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>INTRODUCCION</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Seg&uacute;n datos proporcionados en algunos estudios, entre el 20 al 40% de los diab&eacute;ticos tipo 2 (DM 2) desarrollar&aacute;n nefropat&iacute;a diab&eacute;tica a lo largo de la evoluci&oacute;n de su diabetes, dependiendo de la aparici&oacute;n de los factores de riesgo asociados, tales como: factores gen&eacute;ticos, grado de control de la glicemia, tratamiento apropiado de la presi&oacute;n arterial, dislipidemia, tabaquismo, aparici&oacute;n de microalbuminuria o su progresi&oacute;n hacia proteinuria manifiesta, lo que marcar&aacute; la evoluci&oacute;n hacia la nefropat&iacute;a establecida<sup>1</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La enfermedad renal cr&oacute;nica, estad&iacute;o final de la nefropat&iacute;a diab&eacute;tica, constituye una de las principales causas de muerte en el mundo industrializado; y los pacientes que presentan proteinuria o una disminuci&oacute;n del filtrado glomerular tienen una elevada prevalencia de complicaciones cardiovasculares<sup>2,3</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Hace aproximadamente 20 a&ntilde;os se describi&oacute; a la microalbuminuria (excreci&oacute;n de alb&uacute;mina de 20 a 200 ug/min) como un predictor de  nefropat&iacute;a diab&eacute;tica en pacientes con diabetes mellitus tipo 1 (DM 1)<sup>4</sup>. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Actualmente existe evidencia suficiente para afirmar que la micro  albuminuria no s&oacute;lo predice la aparici&oacute;n de la nefropat&iacute;a diab&eacute;tica, sino   que constituye el primer signo cl&iacute;nico de da&ntilde;o renal en pacientes con  DM 1 y DM<sup>2.5,6</sup>. </font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La nefropat&iacute;a diab&eacute;tica es un s&iacute;ndrome cl&iacute;nico que se caracteriza  por la presencia de: albuminuria persistente, aumento  de la presi&oacute;n arterial, disminuci&oacute;n del filtrado glomerular; asociados a  un alto riesgo de morbilidad y mortalidad de causa cardiovascular<sup>7</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Prevalencia:</b> la misma se ha incrementado en las  dos &uacute;ltimas d&eacute;cadas como consecuencia del mejor abordaje terap&eacute;utico  de las complicaciones cardiovasculares cl&aacute;sicas de la diabetes  (cardiopat&iacute;a isqu&eacute;mica y arteriopat&iacute;a perif&eacute;rica), que ha permitido una  prolongaci&oacute;n en la esperanza de vida y un incremento del n&uacute;mero de  pacientes que tienen complicaciones m&aacute;s tard&iacute;as como la nefropat&iacute;a<sup>8</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Aproximadamente dos tercios de los pacientes diab&eacute;ticos en programas  de di&aacute;lisis peri&oacute;dicas son de tipo 2.9.  La prevalencia de la nefropat&iacute;a diab&eacute;tica en diab&eacute;ticos tipo 2 es muy  variable; en el Reino Unido se han reportado cifras de 5 a 20%,  en Espa&ntilde;a 23,5%, en Brasil 37%10-12 . La prevalencia de la nefropat&iacute;a var&iacute;a tambi&eacute;n de acuerdo a  diferencias raciales y &eacute;tnicas; as&iacute;, es m&aacute;s prevalente entre Afro  americanos, asi&aacute;ticos y Nativos americanos que entre Cauc&aacute;sicos<sup>13</sup>.</font></p>          <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Epidemiolog&iacute;a:</b> existen evidencias que demuestran que aproximadamente el 30%  de los pacientes con microalbuminuria evolucionar&aacute;n a macroalbuminuria   en el transcurso de 5 a 10 a&ntilde;os14. Una vez instalada la macroproteinuria, el clearance de creatinina   comienza a disminuir entre 10 a 12 ml/a&ntilde;o de no instalarse medidas  terap&eacute;uticas intensivas. Sin tratamiento, el paciente desarrollar&aacute;  inevitablemente una insuficiencia renal cr&oacute;nica por lo cual deber&aacute;  ingresar a un plan de hemodi&aacute;lisis cr&oacute;nica &oacute; transplante renal<sup>15</sup> .</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La nefropat&iacute;a diab&eacute;tica aparece en aproximadamente 15 a 40% de   los pacientes con diabetes tipo 1 (DM 1) en promedio 15 a 20 a&ntilde;os posteriores al  diagn&oacute;stico de la enfermedad<sup>16</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El 20 a 40% de los pacientes con diabetes tipo 2 (DM 2) desarrollar&aacute;n microalbuminuria 10 a 15 a&ntilde;os luego del inicio de la enfermedad. La  causa de muerte m&aacute;s frecuente en este grupo de pacientes es la enfermedad cardiovascular<sup>17</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Tamizaje:</b> la detecci&oacute;n de la nefropat&iacute;a diab&eacute;tica debe ser llevada a cabo al  tiempo del diagn&oacute;stico en diab&eacute;ticos tipo 2 y a los 5 a&ntilde;os del diagn&oacute;stico  en diab&eacute;ticos tipo 1. Si la microalbuminuria es negativa, la b&uacute;squeda debe repetirse  anualmente en ambos tipos de pacientes<sup>18</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La detecci&oacute;n de la nefropat&iacute;a diab&eacute;tica puede realizarse por 3  m&eacute;todos:<sup>19</sup></font></p> <ol><font size="2" face="Verdana, Arial, Helvetica, sans-serif">    <li>Muestra de orina minutada (normal &lt;20 ug/minuto).</li>     <li>Determinaci&oacute;n del &iacute;ndice alb&uacute;mina &ndash; creatinina en una muestra de orina aislada (normal &lt;30 mg/gr). </li>     ]]></body>
<body><![CDATA[<li> Cuantificando la excreci&oacute;n urinaria de alb&uacute;mina en orina de 24 hs   (normal &lt;30 mg/24 hs).</li></font>    </ol>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La microalbuminuria se considerar&aacute; patol&oacute;gica cuando dos de tres  determinaciones consecutivas realizadas en un lapso de 3 a 6 meses  sean positivas<sup>19</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La detecci&oacute;n de la nefropat&iacute;a diab&eacute;tica no debe realizarse en la presencia de condiciones que incrementan la excreci&oacute;n urinaria de  alb&uacute;mina, tales como: infecci&oacute;n de v&iacute;as urinarias, hematuria, cuadros  febriles agudos, ejercicio vigoroso, hiperglicemia pronunciada,  hipertensi&oacute;n arterial no controlada, insuficiencia card&iacute;aca<sup>20</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Para llegar al diagn&oacute;stico de microalbuminuria se requieren valores  de 20 a 199 ug/minuto en orina minutada; 30 a 299 mg/gr en orina aislada &oacute; 30 a 299 mg en orina de 24 horas, mientras que para diagnosticar macroalbuminuria se necesitan valores  iguales o mayores a 200 ug/minuto en orina minutada, mayores &oacute; iguales a 300 mg/gr en orina de 24 horas.20 La nefropat&iacute;a diab&eacute;tica establecida se define como la presencia de una proteinuria mayor a 500 mg/24 hs<sup>21</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Factores de riesgo:</b> se pueden dividir en: factores de riesgo modificables y no modificables. Dentro de los factores no modificables tenemos: edad, sexo, raza, factores gen&eacute;ticos, peso al nacimiento, etiolog&iacute;a de la enfermedad renal, grado de insuficiencia renal al momento del diagn&oacute;stico, etc. Los modificables son: mal control metab&oacute;lico de la glicemia, hipertensi&oacute;n arterial (HTA), proteinuria, tabaquismo, obesidad, dislipidemia, anemia, uso de nefrot&oacute;xicos, etc<sup>22</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Un estudio llevado a cabo en E.E.U.U. durante 20 a&ntilde;os demostr&oacute; que la edad avanzada, la HTA, la diabetes mal controlada, el tabaquismo actual y el sexo masculino son factores de riesgo independientes para desarrollar nefropat&iacute;a diab&eacute;tica<sup>23</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El estudio MDRD (Modification of Diet in Renal Disease Study) demostr&oacute; que  una mayor excreci&oacute;n de prote&iacute;nas en la orina, el diagn&oacute;stico de poliquistosis renal, menor concentraci&oacute;n de transferrina en suero, el aumento de la presi&oacute;n arterial media, la raza negra y el colesterol HDL disminuido predicen una disminuci&oacute;n m&aacute;s r&aacute;pida de la tasa de filtraci&oacute;n glomerular<sup>24</sup>. En otro estudio realizado en Espa&ntilde;a se observ&oacute; que la funci&oacute;n renal al inicio, as&iacute; como la presi&oacute;n arterial media, el sexo masculino y la proteinuria eran variables independientes predictivas de la progresi&oacute;n a nefropat&iacute;a diab&eacute;tica<sup>25</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En E.E.U.U. existe una tasa mayor de nefropat&iacute;a diab&eacute;tica en la poblaci&oacute;n de raza negra en comparaci&oacute;n con la poblaci&oacute;n de raza blanca. El bajo peso al nacer, con la consiguiente disminuci&oacute;n de la reserva glomerular, conllevar&iacute;a una hipertensi&oacute;n glomerular compensatoria que podr&iacute;a acelerar la evoluci&oacute;n hacia la insuficiencia renal<sup>26</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los Indios Pima de Arizona, E.E.U.U., tienen mayor susceptibilidad de desarrollar nefropat&iacute;a diab&eacute;tica debido a un efecto gen&eacute;tico en los cromosomas 3q, 7q, 18q y 20p<sup>27</sup>. Otros factores que contribuyen a la r&aacute;pida progresi&oacute;n de la enfermedad renal en los Indios Pima son el volumen glomerular y la densidad de los podocitos. A mayor volumen glomerular y mayor densidad de los podocitos, mayor p&eacute;rdida del filtrado glomerular<sup>28</sup>. Tambi&eacute;n pueden existir otras alteraciones gen&eacute;ticas que favorezcan la r&aacute;pida progresi&oacute;n de la nefropat&iacute;a diab&eacute;tica: los portadores del genotipo DD del gen de la enzima convertidora de la angiotensina progresan m&aacute;s r&aacute;pidamente que los portadores de los genotipos II o DI<sup>29</sup>.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El h&aacute;bito de fumar y el aumento de la excreci&oacute;n urinaria de alb&uacute;mina son predictores de nefropat&iacute;a interrelacionados y favorecen la progresi&oacute;n de la nefropat&iacute;a diab&eacute;tica en pacientes con diabetes tipo 2 a pesar de mejor&iacute;a en el control de la presi&oacute;n arterial y la inhibici&oacute;n de la enzima convertidora de la angiotensina (ECA)<sup>30</sup>. El genotipo Pro/Pro y el tabaquismo fueron factores de riesgo independientes para la nefropat&iacute;a diab&eacute;tica. Los posibles efectos sin&eacute;rgicos de genotipo y fumar pueden agravar el estr&eacute;s oxidativo y contribuir al desarrollo de la nefropat&iacute;a diab&eacute;tica<sup>31</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En pacientes diab&eacute;ticos tipo 2 con microalbuminuria y hipercolesterolemia, la enfermedad renal tiene un curso acelerado, en particular aquellos que presentan polimorfismo en el genotipo H+/H+ en el locus de la lipoprotein lipasa<sup>32</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Tratamiento de la DM:</b> el control gluc&eacute;mico inadecuado se ha asociado con malos resultados en la diabetes. Los primeros estudios observacionales sugieren que un mejor control gluc&eacute;mico puede mejorar los resultados  microvasculares en pacientes con diabetes tipo 1 y 2. Desde entonces, los grandes ensayos que evaluaron el efecto del control intensivo de la glucemia en la poblaci&oacute;n diab&eacute;tica, tales como el DCCT (The Diabetes Control and Complications Trial Research Group)<sup>33</sup>, el UKPDS (UK Prospective Diabetes Study)<sup>34</sup> y el estudio Kumamoto<sup>35</sup> han aportado pruebas s&oacute;lidas de que la terapia intensiva reduce la incidencia y progresi&oacute;n de los resultados microvasculares, incluyendo microalbuminuria, un marcador clave precoz de la nefropat&iacute;a diab&eacute;tica.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El control gluc&eacute;mico influye significativamente en la tasa de progresi&oacute;n de la microalbuminuria a proteinuria y de la nefropat&iacute;a manifiesta a insuficiencia renal cr&oacute;nica. Aunque los ensayos aleatorios grandes y de largo plazo sobre los efectos de un mejor control metab&oacute;lico en la progresi&oacute;n de la nefropat&iacute;a diab&eacute;tica no existen, se describe el concepto de que los per&iacute;odos muy prolongados de buen control metab&oacute;lico son necesarios para tener un impacto positivo en la progresi&oacute;n o incluso obtener la regresi&oacute;n de la nefropat&iacute;a diab&eacute;tica<sup>36</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El control intensivo de la glucosa reduce el riesgo de microalbuminuria y macroalbuminuria comparado con el tratamiento convencional, pero no hay pruebas de que el control intensivo de la glucemia reduce el riesgo de resultados cl&iacute;nicos significativos renales, como la duplicaci&oacute;n de la creatinina s&eacute;rica, enfermedad renal terminal o muerte por enfermedad renal<sup>37</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Tratamiento de la hipertensi&oacute;n arterial y la proteinuria:</b> la enfermedad cardiovascular es la complicaci&oacute;n m&aacute;s costosa de la  diabetes y es la responsable del 86% de las defunciones en pacientes con  diabetes<sup>38</sup>. La hipertensi&oacute;n contribuye sustancialmente a la morbilidad y la mortalidad cardiovascular en las personas con diabetes. Por otra parte, la hipertensi&oacute;n y la diabetes son particularmente frecuentes en determinadas poblaciones, como los afroamericanos y nativos americanos<sup>39</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Existe suficiente evidencia de que se debe mantener cifras de presi&oacute;n arterial menores a 130/80 mm Hg con el fin de preservar la funci&oacute;n renal de manera &oacute;ptima y reducir los eventos cardiovasculares en personas con nefropat&iacute;a diab&eacute;tica, y que m&aacute;s del 65% de las personas con diabetes e hipertensi&oacute;n requieren dos o m&aacute;s medicamentos antihipertensivos diferentes para alcanzar la meta de presi&oacute;n arterial sugerida de 130/80 mmHg<sup>39,40</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los inhibidores de la ECA, que competitivamente bloquean el sistema renina-angiotensina, disminuyen la presi&oacute;n capilar glomerular y previenen la progresi&oacute;n de la microalbuminuria a proteinuria franca<sup>41</sup>. Los resultados de los ensayos cl&iacute;nicos sugieren que los inhibidores de la ECA reducen la p&eacute;rdida de la funci&oacute;n renal en personas con nefropat&iacute;a diab&eacute;tica, por encima y m&aacute;s all&aacute; de cualquier efecto atribuible a una reducci&oacute;n de la presi&oacute;n arterial<sup>42,43</sup>. Posteriormente, tres estudios examinaron el uso de los bloqueantes de los receptores de la angiotensina II (ARA II) en sujetos con diabetes tipo 2 y nefropat&iacute;a. Dos estudios evaluaron cohortes con albuminuria abierta y se encontr&oacute; que los ARA II redujeron el n&uacute;mero de pacientes que tuvieron progresi&oacute;n de la insuficiencia renal terminal o la duplicaci&oacute;n de la creatinina s&eacute;rica, independientemente de una reducci&oacute;n de la presi&oacute;n arterial<sup>44,45</sup>. El tercer estudio evalu&oacute; la progresi&oacute;n de microalbuminuria a macroalbuminuria e inform&oacute; un efecto beneficioso asociado con ARA II, de nuevo de forma independiente de una reducci&oacute;n de la presi&oacute;n arterial<sup>46</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Un estudio cl&iacute;nico compar&oacute; directamente el efecto de un ARA II (telmisart&aacute;n) con un inhibidor de la ECA (enalapril) en sujetos con diabetes tipo 2 y nefropat&iacute;a temprana, que a corto plazo  indic&oacute; que los dos f&aacute;rmacos redujeron la excreci&oacute;n urinaria de alb&uacute;mina; y que las diferencias entre ambos f&aacute;rmacos no fueron significativas. Estos datos determinaron que telmisart&aacute;n no es inferior al enalapril en la prevenci&oacute;n de la progresi&oacute;n de la disfunci&oacute;n renal, medido como la disminuci&oacute;n de la tasa de filtraci&oacute;n glomerular<sup>47</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Si bien las  drogas de primera l&iacute;nea en el tratamiento de la HTA y la proteinuria son los inhibidores de la ECA y los ARA II, hay otras  alternativas en caso de intolerancia a estas drogas o llegado a sus dosis m&aacute;ximas, y entonces aparecen como antihipertensivos de segunda l&iacute;nea los  calcio antagonistas (BCC) y diur&eacute;ticos tiaz&iacute;dicos. El objetivo fundamental es el control de la tensi&oacute;n arterial, independientemente del f&aacute;rmaco utilizado, por lo que no existe un orden de preferencia para elegir el segundo hipotensor en la actualidad<sup>48</sup>. Los antagonistas de la aldosterona como la espironolactona son  superiores a losart&aacute;n para disminuir la proteinuria, pero producen m&aacute;s hiperpotasemia<sup>49</sup>. La eplerenona tiene igualmente una acci&oacute;n antiprotein&uacute;rica. Se deber&iacute;a  limitar su uso en caso de filtrado glomerular menor de 60 ml/minuto con control estricto de los niveles de potasio<sup>50</sup>.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Recientemente se han publicado estudios que demuestran que la administraci&oacute;n conjunta de un inhibidor de la renina- angiotensina (RA) y un BCC inhibe los eventos cardiovasculares en los pacientes no diab&eacute;ticos, diab&eacute;ticos y pacientes con enfermedad renal cr&oacute;nica, a diferencia del uso de un inhibidor de la RA m&aacute;s un diur&eacute;tico<sup>51,52</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Hace poco se public&oacute; el estudio OLCA, que compar&oacute; combinaciones diferentes de ARA II y BCC en pacientes hipertensos no tratados con diabetes. Un grupo recibi&oacute; olmesart&aacute;n m&aacute;s azelnidipino (grupo OL) y el otro grupo recibi&oacute; candesart&aacute;n m&aacute;s amlodipino (grupo CA). La glucemia en ayunas, HbA1c y los niveles de alb&uacute;mina urinaria disminuyeron significativamente en el grupo OL pero no en el grupo CA. Esto sugiere que los efectos en el sistema metab&oacute;lico pueden diferir de acuerdo con la combinaci&oacute;n de ARAII y BCC. Los resultados del estudio OLCA indican que, en los pacientes hipertensos complicados con diabetes mellitus, olmesart&aacute;n en combinaci&oacute;n con azelnidipina tiene efectos beneficiosos en t&eacute;rminos de control de la presi&oacute;n arterial, el metabolismo de la glucosa y protecci&oacute;n renal<sup>53</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Recientemente apareci&oacute; un nuevo f&aacute;rmaco, el  aliskiren, que es un inhibidor de la renina activo por v&iacute;a oral, que se convirti&oacute; en el primer f&aacute;rmaco de su clase en recibir la aprobaci&oacute;n regulatoria europea  para el  tratamiento de la hipertensi&oacute;n en 2007. Aliskiren inhibe la primera etapa en la cascada del sistema renina-angiotensina-aldosterona, la  conversi&oacute;n de angiotensin&oacute;geno a angiotensina I, y de ese modo reduce la s&iacute;ntesis de todos los componentes posteriores de la cascada<sup>54</sup> . Se ha demostrado que la reducci&oacute;n de la proteinuria con este bloqueo se asocia con un mejor pron&oacute;stico renal y cardiovascular<sup>55,56</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El estudio AVOID fue el primer estudio doble ciego, aleatorizado y controlado para demostrar la capacidad antiprotein&uacute;rica de aliskiren  300 mg una vez al d&iacute;a como un complemento al tratamiento est&aacute;ndar, incluyendo la dosis recomendada de un ARA II (losart&aacute;n), en pacientes con diabetes tipo 2, hipertensi&oacute;n y nefropat&iacute;a. Este estudio demostr&oacute; que aliskiren como tratamiento a&ntilde;adido a la terapia est&aacute;ndar, incluyendo la dosis &oacute;ptima del ARA II losart&aacute;n, redujo la albuminuria y fren&oacute; el desarrollo de la disfunci&oacute;n renal m&aacute;s que el placebo en los diferentes niveles de filtrado glomerular en pacientes con diabetes tipo 2, hipertensi&oacute;n y nefropat&iacute;a. La hiperpotasemia es m&aacute;s frecuente en los pacientes tratados con aliskiren con enfermedad renal cr&oacute;nica estadio 357.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Tratamiento de la dislipidemia:</b> los efectos beneficiosos de las estatinas sobre la morbilidad y mortalidad cardiovascular no se pueden explicar solamente por su efecto sobre la lipoprote&iacute;na de baja densidad. Los mecanismos no lip&iacute;dicos que pueden estar involucrados se denominan efectos pleiotr&oacute;picos, tales como estabilizaci&oacute;n de la placa de l&iacute;pidos, disminuci&oacute;n de la inflamaci&oacute;n, disminuci&oacute;n de la trombogenicidad, el aumento de la distensibilidad arterial y la mejor&iacute;a de la funci&oacute;n endotelial<sup>58</sup>. Un metaan&aacute;lisis sobre el tratamiento con estatinas entre los participantes con albuminuria y proteinuria encontr&oacute; que las estatinas pueden reducir moderadamente la excreci&oacute;n patol&oacute;gica de alb&uacute;mina  dentro de una mediana de 6 meses despu&eacute;s del inicio de la terapia<sup>59</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Tratamiento multifactorial:</b> en pacientes con DM 2 y microalbuminuria, la intervenci&oacute;n multifactorial sobre el estilo de vida, el control intensivo de glucemia y de tensi&oacute;n arterial con inhibidores de la ECA redujo en 50% las complicaciones macro y microvasculares en el grupo de tratamiento intensivo<sup>60</sup>. Con medidas diet&eacute;ticas y ejercicio f&iacute;sico regular, insistir en el cese del h&aacute;bito tab&aacute;quico y en la restricci&oacute;n de la ingesta de prote&iacute;nas  a 0,8-1 g/kg/d&iacute;a en estadios iniciales de insuficiencia renal y 0,8 g/kg/d&iacute;a en estadios m&aacute;s avanzados, se consiguen buenos resultados<sup>61</sup>.</font></p>      <hr size "1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>OBJETIVOS</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Hallar la prevalencia de la nefropat&iacute;a diab&eacute;tica en una poblaci&oacute;n de pacientes con diabetes tipo 2 internados en el Departamento de Urgencias Adultos del Hospital Nacional (Itaugu&aacute;).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Determinar el grado de proteinuria, clearance de creatinina y el control metab&oacute;lico de los pacientes con nefropat&iacute;a diab&eacute;tica. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Describir la frecuencia de hipertensi&oacute;n arterial y dislipidemia, as&iacute; como el tratamiento de los pacientes con nefropat&iacute;a diab&eacute;tica.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Determinar el estad&iacute;o de la nefropat&iacute;a diab&eacute;tica seg&uacute;n los a&ntilde;os de evoluci&oacute;n de la diabetes.</font></p> <hr size "1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>MATERIALES Y METODOS</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Dise&ntilde;o</b>: estudio observacional descriptivo de corte  transverso.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Poblaci&oacute;n de estudio</b>: varones y mujeres, mayores de edad, portadores de DM 2 internados en el Departamento de Urgencias Adultos del  Hospital Nacional (Itaugu&aacute;) desde el 1&ordm; de Enero al 30 de Junio de 2.012. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Criterios de Exclusi&oacute;n</b>:</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Pacientes con diagn&oacute;stico de diabetes tipo 1.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Pacientes con infecci&oacute;n de v&iacute;as urinarias e insuficiencia cardiaca.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Expedientes cl&iacute;nicos incompletos.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Muestreo</b>: no probabil&iacute;stico de casos consecutivos.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Variables</b>: edad, sexo;  a&ntilde;os de evoluci&oacute;n de la diabetes, tipo de medicaci&oacute;n, glicemia, HbA1c; proteinuria de 24 hs, clearance de creatinina, presencia de  factores de riesgo para nefropat&iacute;a diab&eacute;tica asociados (hipertensi&oacute;n arterial, dislipidemia y tabaquismo).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Instrumentos de medici&oacute;n</b>: expedientes cl&iacute;nicos del Departamento de Urgencias Adultos del Hospital Nacional (Itaugu&aacute;).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Cuestiones &eacute;ticas</b>: se respetaron los Principios de la Bio&eacute;tica. Se mantuvo el anonimato de los pacientes. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Definiciones Operacionales:</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Diabetes tipo 2: pacientes conocidos diab&eacute;ticos tipo 2 tratados con dieta, antidiab&eacute;ticos orales, insulina &oacute; sin tratamiento alguno. Pacientes no conocidos diab&eacute;ticos tipo 2 con cifras de glicemia  basal en dos &oacute; m&aacute;s tomas consecutivas mayores &oacute; iguales a 126  mg/dL; &oacute; prueba de tolerancia oral a la glucosa con cifras de glicemia  iguales &oacute; mayores a 200 mg/dl a las 2 horas &oacute; con HbA1c igual o mayor a 6,5%. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Hipertensi&oacute;n arterial: pacientes conocidos hipertensos en  tratamiento con dieta &oacute; f&aacute;rmacos antihipertensivos; &oacute; no conocidos  hipertensos, con cifras de tensi&oacute;n arterial sist&oacute;lica (TAS) en dec&uacute;bito iguales &oacute;  mayores a 140 mm/Hg y/&oacute; tensi&oacute;n arterial diast&oacute;lica (TAD) igual &oacute; mayor a 90  mm/Hg. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Dislipidemia: cifras de colesterol total mayores a 200 mg/dL y  triglic&eacute;ridos superior a 160 mg/dL.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Tabaquismo: aquel que refiere antecedentes de consumo de tabaco  (cigarrillos, puros, pipa) hasta 1 a&ntilde;o antes de la fecha indicada en el  estudio.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Nefropat&iacute;a diab&eacute;tica establecida: proteinuria mayor &oacute; igual a 500 mg en una  muestra de orina de 24 horas. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Microalbuminuria: proteinuria entre 30-300 mg en una muestra de orina de 24 horas.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Normoalbuminuria: proteinuria menor a 30 mg en una muestra de orina de 24 horas.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Buen control metab&oacute;lico: cifras de HbA1c menores a 7%.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Mal control metab&oacute;lico: cifras de HbA1c iguales o mayores a 7%.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">An&aacute;lisis de datos: los datos fueron cargados en una planilla Excel 2007 y analizados con el paquete estad&iacute;stico Epi Info 2000&copy;. Los datos fueron sometidos a estad&iacute;stica descriptiva. Para la descripci&oacute;n de las variables se utilizaron proporciones para las variables cualitativas y media &plusmn;DS para las  continuas.</font></p> <hr size "1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>RESULTADOS</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Fueron estudiados 148 pacientes con diagn&oacute;stico de DM 2. La edad media de los pacientes fue de 61&plusmn;11 a&ntilde;os. Eran del sexo femenino 77 (52%) y masculino 71 (48%). Se encontraron 62 pacientes (42%) con nefropat&iacute;a diab&eacute;tica.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La media de la proteinuria de 24 horas fue de 904&plusmn;90 mg y el clearance de creatinina fue de 74&plusmn;48 ml/min.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La media de la HbA1c fue de 10,4&plusmn;4,3%. La media de la glicemia fue de 199&plusmn;72 mg/dL.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">De acuerdo al tratamiento que recib&iacute;an estos pacientes previamente a la internaci&oacute;n, se encontr&oacute; que 21 pacientes (35%) estaban tratados con glibenclamida. Se diagnostic&oacute; diabetes a 11 pacientes (17%) durante su internaci&oacute;n y, por consiguiente, no estaban tratados (ver tabla 1).</font></p>     <p>&nbsp;</p>     <p align="center"><img src="/img/revistas/hn/v5n1/1a03t1.jpg"><a name="1a03t1"></a></p>     ]]></body>
<body><![CDATA[<p align="center"> <font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><a href="#1a03t1">Tabla 1</a>.</b> Tratamiento farmacologico de diab&eacute;ticos tipo 2 (n 148)</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En cuanto al control metab&oacute;lico, 13 pacientes (21%)  presentaban buen control metab&oacute;lico y 49 pacientes (79%) con mal control metab&oacute;lico. Presentaban HTA 33  pacientes (53%), predominando la HTA en estad&iacute;o 2: 42 (54%).  En cuanto al tratamiento de la HTA, la mayor&iacute;a (27%) estaban sin tratamiento. Ninguno estaba tratado con 2 o m&aacute;s antihipertensivos (ver tabla 1). </font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Presentaron dislipidemia 25 pacientes (41%), predominado las formas mixtas: 14 pacientes (56%).   Eran tabaquistas 14 pacientes (23%).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se encontr&oacute; a 12 pacientes con un filtrado glomerular menor a 60 ml/min (19%), y 50 pacientes con filtrado glomerular mayor a 60 ml/min.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se dividi&oacute; a los pacientes en 4 grupos teniendo como par&aacute;metro principal a la duraci&oacute;n de la diabetes, tratando de correlacionarla con el  grado de nefropat&iacute;a que presentaban y se constat&oacute; lo siguiente: </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Diab&eacute;ticos de reciente diagn&oacute;stico: en este grupo se encontraban 24 pacientes. Presentaron  nefropat&iacute;a diab&eacute;tica 2 pacientes (8%) y sin nefropat&iacute;a diab&eacute;tica 22 pacientes (92%).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Diab&eacute;ticos de menos de 5 a&ntilde;os de evoluci&oacute;n: en este grupo hab&iacute;an 55 pacientes. Presentaron nefropat&iacute;a diab&eacute;tica 17 pacientes (31%) y sin nefropat&iacute;a diab&eacute;tica 38 pacientes (69%). </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Diab&eacute;ticos de 6 a 10 a&ntilde;os de evoluci&oacute;n: en este grupo se hallaban 39 pacientes: con nefropat&iacute;a diab&eacute;tica 23 pacientes (59%) y sin nefropat&iacute;a 16 pacientes (41%).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Diab&eacute;ticos de m&aacute;s de 10 a&ntilde;os de evoluci&oacute;n:  a este grupo pertenec&iacute;an 30 pacientes: con nefropat&iacute;a diab&eacute;tica 20 pacientes (67%) y sin nefropat&iacute;a 10 pacientes (33%). </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La prevalencia de nefropat&iacute;a diab&eacute;tica fue aumentando en forma proporcional a los a&ntilde;os de evoluci&oacute;n de la diabetes (ver gr&aacute;fico 1).</font></p>     ]]></body>
<body><![CDATA[<p align="center"><img src="/img/revistas/hn/v5n1/1a03g1.jpg"><a name="1a03g1"></a></p>     <p align="center"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><a href="#1a03g1">Grafico 1</a>.</b> Nefropatía Diabetica según años de evolución de la diabetes (n 148)</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Inversamente, el porcentaje de pacientes diab&eacute;ticos sin nefropat&iacute;a fue disminuyendo en forma inversamente proporcional a los a&ntilde;os de evoluci&oacute;n de la diabetes (ver gr&aacute;fico 2).</font></p>     <p align="center"><img src="/img/revistas/hn/v5n1/1a03g2.jpg"><a name="1a03g2"></a></p>     <p align="center"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><a href="#1a03g2">Grafico 2</a>.</b> Pacientes sin Nefropatía diabética según los años de evolucion de la diabetes (n 148)</font></p> <hr size "1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>DISCUSION</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El presente trabajo demuestra que entre los pacientes diab&eacute;ticos  tipo 2 internados en el Departamento de Urgencias Adultos del Hospital Nacional existe una elevada prevalencia de casos de  nefropat&iacute;a diab&eacute;tica (42%), expresada por proteinuria importante en la muestra de orina de 24 horas. Esta cifra es superior a la encontrada en otros pa&iacute;ses10-12.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Tambi&eacute;n se encontr&oacute; una importante cantidad de pacientes con factores de riesgo:   HTA, dislipidemia y tabaquismo, que sumados al mal control metab&oacute;lico, pudieron contribuir a la elevada  frecuencia de nefropat&iacute;a diab&eacute;tica que presentaban estos pacientes durante su internaci&oacute;n. Se sabe que el tratamiento de estos factores de riesgo,  modificables con un tratamiento apropiado, con una intervenci&oacute;n intensificada multifactorial tratando apropiadamente la hiperglucemia, la HTA, la dislipidemia y la microalbuminuria, se puede retrasar significativamente la progresi&oacute;n de la nefropat&iacute;a diab&eacute;tica<sup>60</sup>.</font></p>        <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Al constatar cifras medias de HbA1c elevadas se puede afirmar que el control metab&oacute;lico de los  pacientes estudiados es malo, lo cual coincide con lo reportado en la literatura, que aquellos pacientes con un mal control glic&eacute;mico, desarrollan nefropat&iacute;a precozmente, ya que los criterios de control glic&eacute;mico de  la Asociaci&oacute;n Americana de Diabetes recomiendan en los diab&eacute;ticos tipo 2 una HbA1c menor a 7% como control aceptable<sup>61</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El mal control metab&oacute;lico de los pacientes estudiados podr&iacute;a  deberse a que el 16% de ellos no se conoc&iacute;an diab&eacute;ticos, y por consiguiente, no estaban tratados; adem&aacute;s, el 31% de los que se conoc&iacute;an  diab&eacute;ticos no recib&iacute;an ning&uacute;n tipo de tratamiento, diet&eacute;tico ni farmacol&oacute;gico.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Tambi&eacute;n es importante mencionar que m&aacute;s de la mitad de los pacientes estudiados eran hipertensos, y a su vez, m&aacute;s de la mitad de ellos ten&iacute;an HTA estad&iacute;o 2. Estas cifras de presi&oacute;n arterial elevada se pueden atribuir a que el 33% de estos pacientes estaban sin tratamiento, y ninguno de ellos estaban tratados con 2 o m&aacute;s antihipertensivos. Las gu&iacute;as apuntan a mantener la presi&oacute;n arterial menor a 130/80 en pacientes diab&eacute;ticos hipertensos, y m&aacute;s de la mitad de ellos necesitan 2 o m&aacute;s f&aacute;rmacos antihipertensivos para llegar a esta meta<sup>39,40</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los IECA y los ARA II son se&ntilde;alados en varios estudios como los m&aacute;s eficaces para retrasar la progresi&oacute;n de la enfermedad renal en los pacientes con nefropat&iacute;a diab&eacute;tica incipiente o establecida, sugiri&eacute;ndose su indicaci&oacute;n como agentes de primera l&iacute;nea41-47. En los pacientes estudiados, ambos fueron utilizados solamente por pocos sujetos, lo que tambi&eacute;n podr&iacute;a justificar la elevada prevalencia de nefropat&iacute;a diab&eacute;tica encontrada. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Al agrupar a los pacientes de acuerdo a los a&ntilde;os de evoluci&oacute;n de la  diabetes se puede observar un ascenso progresivo en el porcentaje de  pacientes con nefropat&iacute;a diab&eacute;tica a medida que aumentan los a&ntilde;os de  evoluci&oacute;n de la enfermedad, evoluci&oacute;n similar, aunque m&aacute;s acentuada, como la encontrada en el estudio UKPDS10.</font></p>        <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Inversamente a lo que ocurre con la nefropat&iacute;a diab&eacute;tica, los pacientes sin nefropat&iacute;a diab&eacute;tica se presentan con mayor frecuencia en los diab&eacute;ticos recientemente diagnosticados, y van disminuyendo su frecuencia acorde a los a&ntilde;os de evoluci&oacute;n de la diabetes, evoluci&oacute;n similar tambi&eacute;n, aunque m&aacute;s acentuada a la hallada el estudio UKPDS10.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En comparaci&oacute;n con otros estudios descriptos en la literatura, realizados en el Reino Unido, Espa&ntilde;a y Brasil,10-12 los pacientes estudiados en nuestra serie presentaron mayor prevalencia de nefropat&iacute;a diab&eacute;tica y las cifras de HbA1c fueron mayores, si bien la frecuencia de HTA y dislipidemia fueron menores en comparaci&oacute;n a estos estudios. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La edad de los pacientes estudiados fue mayor que en el Reino Unido y Brasil, pero menor que en Espa&ntilde;a. La nefropat&iacute;a fue m&aacute;s frecuente en hombres en el Reino Unido. Las cifras de tabaquismo fueron mayores que en Espa&ntilde;a.</font></p> <hr size "1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>CONCLUSIONES</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los pacientes diab&eacute;ticos internados en el Departamento de Urgencias Adultos del Hospital Nacional presentan un elevada prevalencia de nefropat&iacute;a diab&eacute;tica, mal control metab&oacute;lico, as&iacute; como tambi&eacute;n un elevado porcentaje de factores de riesgo para desarrollar nefropat&iacute;a diab&eacute;tica, tales como: dislipidemia y tabaquismo.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La prevalencia de la nefropat&iacute;a fue aumentando en relaci&oacute;n a los a&ntilde;os de evoluci&oacute;n de la diabetes.</font></p>  <hr size "1" noshade>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>REFERENCIAS</b></font></p>     ]]></body>
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