<?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>0034-7434</journal-id>
<journal-title><![CDATA[Revista Colombiana de Obstetricia y Ginecología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Colomb Obstet Ginecol]]></abbrev-journal-title>
<issn>0034-7434</issn>
<publisher>
<publisher-name><![CDATA[Federación Colombiana de Obstetricia y GinecologíaRevista Colombiana de Obstetricia y Ginecología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-74342010000300008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Manejo integral de la gestante con Virus de la Inmunodeficiencia Humana]]></article-title>
<article-title xml:lang="en"><![CDATA[Integral management of HIV-infected-pregnant females]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rada-Ortega]]></surname>
<given-names><![CDATA[Camilo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Jiménez]]></surname>
<given-names><![CDATA[Jorge Mario]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Antioquia Facultad de Medicina Nivel XI de Medicina]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Antioquia Facultad de Medicina Obstetricia y Ginecología]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2010</year>
</pub-date>
<volume>61</volume>
<numero>3</numero>
<fpage>239</fpage>
<lpage>246</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74342010000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74342010000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74342010000300008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Objetivo: revisar los aspectos más relevantes del manejo de la gestante con virus de inmunodeficiencia humana (VIH) antes, durante y después del parto. También se incluyen las medidas básicas de cuidado al recién nacido. Metodología: se realizó una revisión de las publicaciones en MEDLInE entre enero de 2000 y junio de 2009 sobre el tema. Asimismo, se abordaron las guías de manejo del Ministerio de Protección Social de Colombia y las pertenecientes a los Centros para el Control de Enfermedades de los EE.UU. de América. Resultados: la oportuna prescripción de la terapia antirretroviral de alta efectividad durante el control prenatal, la utilización de profilaxis antirretroviral anteparto, la realización de cesárea anteparto, evitar la lactancia materna y la profilaxis neonatal son las medidas que evitarán casi al 100% la transmisión madre-hijo del VIH. Conclusión: el manejo actualmente recomendado permite la prevención de la transmisión madre-hijo del VIH en la mayoría de los casos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Objective: reviewing the most relevant aspects involved in managing pregnant females affected by human immunodeficiency virus (HIV) before, during and after giving birth. Basic measures in caring for the newborn are also included. Methodology: MEDLInE publications on the topic published from January 2000 to June 2009 were reviewed. Colombian Ministry of Social Protection guidelines were also reviewed as well as those from the US Centers for Disease Control and Prevention (CDC). Results: the opportune prescription of highly effective antiretroviral therapy during prenatal control, using pre-delivery antiretroviral prophylaxis, performing caesarean section, avoiding maternal breastfeeding and neonatal prophylaxis were found to be the measures which would lead to almost 100% mother-child HIV transmission being avoided. Conclusion: current management recommendations would lead to preventing mother-child HIV transmission in most cases.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[VIH]]></kwd>
<kwd lng="es"><![CDATA[embarazo]]></kwd>
<kwd lng="es"><![CDATA[neonato]]></kwd>
<kwd lng="es"><![CDATA[lactancia]]></kwd>
<kwd lng="es"><![CDATA[anticoncepción]]></kwd>
<kwd lng="en"><![CDATA[HIV]]></kwd>
<kwd lng="en"><![CDATA[pregnancy]]></kwd>
<kwd lng="en"><![CDATA[newborn]]></kwd>
<kwd lng="en"><![CDATA[breastfeeding]]></kwd>
<kwd lng="en"><![CDATA[contraception]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font face="verdana" size="2">  <font size="4">    <center><b>Manejo integral de la gestante con Virus de la Inmunodeficiencia Humana </b></center></font>      <p>    <center>    <p>Camilo Rada-Ortega*, Jorge Mario G&oacute;mez-Jim&eacute;nez, M.D.** </p></center></p>      <p>    <center>    <p>Recibido: noviembre 17/09 - Aceptado: agosto 9/10</p></center></p>      <p>* Estudiante del nivel XI de Medicina. Facultad de Medicina de la Universidad de Antioquia. Medell&iacute;n (Colombia). Correo electr&oacute;nico: <a href="mailto:drcroe@gmail.com">drcroe@gmail.com</a></p>      <p>** Profesor Asociado, Especialista en Obstetricia y Ginecolog&iacute;a. Facultad de Medicina de la Universidad de Antioquia. Medell&iacute;n (Colombia). </p>     ]]></body>
<body><![CDATA[<p><b>RESUMEN </b></p>     <p><b>Objetivo:</b> revisar los aspectos m&aacute;s relevantes del manejo de la gestante con virus de inmunodeficiencia humana (VIH) antes, durante y despu&eacute;s del parto. Tambi&eacute;n se incluyen las medidas b&aacute;sicas de cuidado al reci&eacute;n nacido. </p>     <p><b>Metodolog&iacute;a: </b>se realiz&oacute; una revisi&oacute;n de las publicaciones en MEDLInE entre enero de 2000 y junio de 2009 sobre el tema. Asimismo, se abordaron las gu&iacute;as de manejo del Ministerio de Protecci&oacute;n Social de Colombia y las pertenecientes a los Centros para el Control de Enfermedades de los EE.UU. de Am&eacute;rica. </p>     <p><b>Resultados: </b>la oportuna prescripci&oacute;n de la terapia antirretroviral de alta efectividad durante el control prenatal, la utilizaci&oacute;n de profilaxis antirretroviral anteparto, la realizaci&oacute;n de ces&aacute;rea anteparto, evitar la lactancia materna y la profilaxis neonatal son las medidas que evitar&aacute;n casi al 100% la transmisi&oacute;n madre-hijo del VIH. </p>     <p><b>Conclusi&oacute;n: </b>el manejo actualmente recomendado permite la prevenci&oacute;n de la transmisi&oacute;n madre-hijo del VIH en la mayor&iacute;a de los casos. </p>     <p><b>Palabras clave: </b>VIH, embarazo, neonato, lactancia, anticoncepci&oacute;n. </p> <font size="4">    <center><b>Integral management of HIV-infected-pregnant females </b></center></font>     <p><b>SUMMARY </b></p>     <p><b>Objective: </b>reviewing the most relevant aspects involved in managing pregnant females affected by human immunodeficiency virus (HIV) before, during and after giving birth. Basic measures in caring for the newborn are also included. </p>     <p><b>Methodology: </b>MEDLInE publications on the topic published from January 2000 to June 2009 were reviewed. Colombian Ministry of Social Protection guidelines were also reviewed as well as those from the US Centers for Disease Control and Prevention (CDC). </p>     ]]></body>
<body><![CDATA[<p><b>Results: </b>the opportune prescription of highly effective antiretroviral therapy during prenatal control, using pre-delivery antiretroviral prophylaxis, performing caesarean section, avoiding maternal breastfeeding and neonatal prophylaxis were found to be the measures which would lead to almost 100% mother-child HIV transmission being avoided. </p>     <p><b>Conclusion: </b>current management recommendations would lead to preventing mother-child HIV transmission in most cases. </p>     <p><b>Key words: </b>HIV, pregnancy, newborn, breastfeeding, contraception. </p>     <p><b>INTRODUCCI&Oacute;N </b></p>     <p>La disponibilidad de medicamentos antirretrovirales ha permitido una reducci&oacute;n del porcentaje de ni&ntilde;os nacidos de madre VIH positiva, con transmisi&oacute;n del VIH madre-hijo en Europa y Estados Unidos. Este tipo de infecci&oacute;n se redujo de una frecuencia del 25% a menos del 2%.<sup>1 </sup>Este descenso ocurre por el uso de la de profilaxis perinatal espec&iacute;fica,<sup>2 </sup>la pr&aacute;ctica de la ces&aacute;rea en sus respectivas indicaciones y el reemplazo de lactancia materna por leche de f&oacute;rmula segura para el reci&eacute;n nacido.<sup>3,4 </sup></p>     <p>Se estima que alrededor de 38,6 millones de personas est&aacute;n infectadas con VIH en todo el mundo y que 25 millones han fallecido a causa de la infecci&oacute;n.<sup>5 </sup>Por otra parte, de un 25% a un 30% de las mujeres con VIH en norteam&eacute;rica, que reciben tratamiento para la infecci&oacute;n, desean estar embarazadas.<sup>6,7 </sup></p>     <p>Sin embargo, la transmisi&oacute;n madre-hijo del virus, es responsable del 70% de los casos de ni&ntilde;os infectados cada a&ntilde;o en el mundo y es m&aacute;s probable que ocurra durante el trabajo de parto.<sup>8 </sup>Lo anterior constituye un llamado de atenci&oacute;n a los profesionales de la salud, encargados del cuidado obst&eacute;trico, para que intervengan de forma oportuna en la prevenci&oacute;n de la infecci&oacute;n en el reci&eacute;n nacido. </p>     <p>Teniendo en cuenta que la atenci&oacute;n obst&eacute;trica en Colombia es realizada tanto por m&eacute;dicos generales como por especialistas, con la participaci&oacute;n de personal de enfermer&iacute;a, y que la infecci&oacute;n con VIH debe ser prevenida y reconocida en estadios iniciales, es necesario disponer de herramientas que nos permitan ofrecer la mejor atenci&oacute;n posible a la gestante con VIH, una vez se presenta a la primera consulta prenatal. </p>     <p>El abordaje a la paciente embarazada infectada con VIH debe hacerse en el control prenatal, durante el parto, en el per&iacute;odo de lactancia materna y en las primeras semanas de vida del reci&eacute;n nacido, pues es durante estos per&iacute;odos en los que el personal de salud puede intervenir en el cuidado de la paciente y su producto de concepci&oacute;n, para prevenir la infecci&oacute;n resultante de la gestaci&oacute;n. </p>     <p>Es por esto que el objetivo de esta revisi&oacute;n es presentar la evidencia disponible respecto al curso de la entidad durante el embarazo y acerca de las recomendaciones para la prevenci&oacute;n de la enfermedad madre-hijo en los momentos antes mencionados. </p>     ]]></body>
<body><![CDATA[<p><b>METODOLOG&Iacute;A </b></p>     <p>En la base de datos PubMed/MEDLInE, se realiz&oacute; una b&uacute;squeda de las publicaciones entre enero de 2000 y junio de 2009. Se utilizaron los t&eacute;rminos: <i>&ldquo;virus de inmunodeficiencia humana&rdquo;</i>, <i>&ldquo;transmisi&oacute;n madre-hijo&rdquo;</i>, <i>&ldquo;terapia antirretroviral&rdquo;</i>, <i>&ldquo;neonato&rdquo;</i>. Se incluyeron en la b&uacute;squeda investigaciones originales y art&iacute;culos de revisi&oacute;n, metaan&aacute;lisis, gu&iacute;as de pr&aacute;ctica cl&iacute;nica, entre otros. Por otra parte, se revisaron las gu&iacute;as de manejo del Ministerio de Protecci&oacute;n Social de Colombia y las de los Centros para el control de Enfermedades de los EE.UU. de Am&eacute;rica. </p>     <p><b>Infecci&oacute;n con VIH durante el embarazo </b></p>     <p>Estudios realizados en Europa y EE.UU. no muestran que el embarazo contribuya a la progresi&oacute;n de la infecci&oacute;n, aunque en pa&iacute;ses en v&iacute;a de desarrollo s&iacute; se observa un aumento de la progresi&oacute;n de la enfermedad y de la probabilidad de muerte de la madre.<sup>9,10 </sup></p>     <p>Con respecto a los efectos de la infecci&oacute;n sobre el embarazo, se ha documentado un peque&ntilde;o aumento en la tasa de abortos, mortalidad perinatal y neonatal, restricci&oacute;n del crecimiento intrauterino y bajo peso al nacer.<sup>11 </sup></p>     <p>Hasta la fecha no se ha descrito un s&iacute;ndrome de malformaci&oacute;n relacionado con la infecci&oacute;n con VIH, ni tampoco se ha informado aumento en la frecuencia de defectos cong&eacute;nitos relacionados con la infecci&oacute;n.<sup>12-14 </sup></p>     <p><b><i>Recomendaciones para el manejo de la infecci&oacute;n durante el embarazo </i></b></p>     <p>Para el manejo de la paciente gestante infectada, que acude a consulta antes del parto, el Ministerio de la Protecci&oacute;n Social de Colombia dispuso una gu&iacute;a para el manejo de VIH/SIDA,<sup>15</sup> que propone: Realizar una prueba de tamizaje (ELISA) en toda paciente que acuda a consulta por primera vez, idealmente en el primer trimestre o en la primera consulta del control prenatal. Esta prueba debe ser antecedida por una explicaci&oacute;n clara y coherente de la que se debe dejar constancia firmada de la aceptaci&oacute;n o rechazo de su realizaci&oacute;n. Las pacientes que lleguen en trabajo de parto urgente (expulsivo), se les debe realizar una prueba r&aacute;pida de tamizaje as&iacute; no tengan tamizaci&oacute;n previa. </p>     <p>La prueba debe repetirse cuando se diagnostiquen infecciones de transmisi&oacute;n sexual durante el embarazo, uso de drogas intravenosas o m&uacute;ltiples compa&ntilde;eros sexuales. </p>     <p>En la paciente VIH positivo: se debe hacer tamizaje para otras infecciones de transmisi&oacute;n sexual, hepatitis B y C. Estos ex&aacute;menes se realizan para diagnosticar oportunamente comportamientos y conductas sexuales de riesgo, tanto para la madre como para el feto. </p>     ]]></body>
<body><![CDATA[<p>Idealmente, el manejo debe ser multidisciplinario: se debe incluir un m&eacute;dico general, un obstetra, un neonat&oacute;logo o en su defecto un pediatra, y personal de enfermer&iacute;a. </p>     <p>La carga viral es el factor m&aacute;s importante para la transmisi&oacute;n vertical y est&aacute; asociada a la transmisi&oacute;n que ocurre con la lactancia materna. Por lo anterior, se debe iniciar y/o continuar la terapia antirretroviral de alta efectividad, con el objetivo de mantener niveles indetectables de carga viral. Cuando la paciente tiene un diagn&oacute;stico confirmado de infecci&oacute;n con VIH y no ha recibido tratamiento, &eacute;ste se debe iniciar en la semana 14 con terapia antirretroviral de alta efectividad y se debe evitar recibir monoterapia o terapia con dos medicamentos.<sup>16 </sup>Generalmente, la terapia antirretroviral de alta efectividad est&aacute; compuesta por dos inhibidores an&aacute;logos de nucle&oacute;sido de la transcriptasa reversa, junto con un inhibidor an&aacute;logo no-nucle&oacute;sido de la transcriptasa reversa o un inhibidor de proteasa. Si la madre ya recib&iacute;a tratamiento, &eacute;ste debe ser evaluado antes de continuarse, teniendo en cuenta las siguientes recomendaciones generales que fueron publicadas en la gu&iacute;a de la <i>Public Health Service Task Force </i>en abril de 2009 para el manejo de la paciente gestante infectada con VIH:<sup>17 </sup></p>     <p>Terapia antirretroviral o profilaxis para todas las pacientes infectadas (independiente de la carga viral o CD4).</p>     <p>Zidovudina incluida en todos los reg&iacute;menes (debido a su acumulaci&oacute;n de forma activa en la placenta).</p>     <p>Evaluar la resistencia si hay viremia detectable.</p>     <p>Evitar efavirenz en el 1<sup>er </sup>trimestre (potencial teratog&eacute;nico).</p>     <p>No prescribir las combinaciones: zidovudina + estavudina, didanosina + estavudina o didanosina + zalcitabina. Estas combinaciones pueden generar toxicidad hep&aacute;tica y en el sistema nervioso central, acidosis l&aacute;ctica y disminuci&oacute;n de la eficacia de ambos, respectivamente. </p>     <p><b><i>Recomendaciones para el manejo de la infecci&oacute;n durante el parto </i></b></p>     <p>El riesgo de transmisi&oacute;n madre-hijo de VIH es mayor durante el trabajo de parto que en otros instantes.<sup>8 </sup>Ocurre por la presencia de microtransfusiones de sangre durante las contracciones, por la infecci&oacute;n ascendente luego de la ruptura de las membranas y a que el feto degluta secreciones contaminadas con el virus; estas son las hip&oacute;tesis m&aacute;s representativas que explican el alto riesgo.<sup>11 </sup>Debido a lo anterior, el per&iacute;odo intraparto debe ser manejado con base en dos estrategias de intervenci&oacute;n, una de ellas la terapia farmacol&oacute;gica y la otra la atenci&oacute;n del parto mediante ces&aacute;rea. </p>     <p>En cuanto a la primera estrategia, la recomendaci&oacute;n actual consiste en ofrecer zidovudina sola o combinada con otros medicamentos antirretrovirales a todas las gestantes infectadas.<sup>17</sup>El esquema consiste en una carga inicial de zidovudina de 2 mg/kg IV administrados en 1 hora, seguido por infusi&oacute;n continua de 1 mg/kg cada hora hasta finalizar el parto.<sup>1 </sup>Si se programa ces&aacute;rea, el esquema debe iniciarse 3 horas antes del procedimiento quir&uacute;rgico. </p>     ]]></body>
<body><![CDATA[<p>Otros medicamentos antirretrovirales que la madre haya estado consumiendo durante la gestaci&oacute;n se pueden continuar por v&iacute;a oral, excepto la estadovudina, pues esta presenta antagonismo farmacol&oacute;gico con la zidovudina, lo que influir&iacute;a en el efecto del esquema anteriormente mencionado. En cuanto a la realizaci&oacute;n de la operaci&oacute;n ces&aacute;rea electiva programada, la recomendaci&oacute;n actual establecida por el Colegio Americano de Obstetras y Ginec&oacute;logos es la realizaci&oacute;n de ces&aacute;rea electiva programada (definida como ces&aacute;rea antes del trabajo de parto y ruptura prematura de membranas) a gestantes con VIH que presenten un nivel de <b>&aacute;cido ribonucleico </b>(ARn) viral mayor a 1.000 copias/ml en el per&iacute;odo cercano al momento del parto.<sup>18 </sup>Para las pacientes que presenten un nivel de ARn viral menor a 1.000 copias/ml, no hay evidencia clara disponible que recomiende la ces&aacute;rea electiva programada.<sup>19 </sup>Se recomienda practicarla a las 38 semanas de gestaci&oacute;n, siendo estas determinadas por el mejor m&eacute;todo cl&iacute;nico y ecogr&aacute;fico. Se debe evitar la realizaci&oacute;n de amniocentesis.<sup>20,21 </sup></p>     <p>En pacientes con VIH tambi&eacute;na plica eluso de profilaxis antimicrobiana.<sup>22 </sup>Lamorbilidadpospartoatribuible a infecciones se aumenta potencialmente con la ces&aacute;rea, tanto en pacientes seropositivas como seronegativas. Se estima que este tipo de complicaciones es cinco a siete veces m&aacute;s com&uacute;n despu&eacute;s de practicarse la ces&aacute;rea, posterior al inicio del trabajo de parto o ruptura de membranas, comparado con el parto vaginal.<sup>23,24 </sup></p>     <p>Finalmente, debe evitarse la coadministraci&oacute;n de metilergonovina e inhibidores de proteasa, debido a la exagerada vasoconstricci&oacute;n que se puede generar durante el manejo de la aton&iacute;a uterina posparto.<sup>17 </sup></p>     <p><b><i>Recomendaciones para el manejo de la infecci&oacute;n durante el per&iacute;odo posparto </i></b></p>     <p>La morbilidad materna en el per&iacute;odo posparto suele aumentar, por lo tanto no se recomienda dar de alta a la paciente de forma temprana.<sup>11 </sup></p>     <p>El seguimiento al binomio madre-hijo debe continuar por parte del m&eacute;dico de atenci&oacute;n primaria; adem&aacute;s, se debe aconsejar a la madre el uso de m&eacute;todos anticonceptivos. Hay que tener en cuenta que los niveles de estradiol de algunos anticonceptivos hormonales se reducen con la ingesta simult&aacute;nea de nevirapina, ritonavir, nelfinavir, rifampina y rifabutina, lo cual puede conducir a la disminuci&oacute;n en la eficacia de la anticoncepci&oacute;n.<sup>25 </sup>La terapia antirretroviral de alta efectividad debe continuarse cuando est&eacute; indicado y la suspensi&oacute;n de los medicamentos antirretrovirales debe decidirse en conjunto con el m&eacute;dico encargado del manejo de la infecci&oacute;n.<sup>26 </sup></p>     <p><b>Recomendaciones sobre la lactancia materna </b></p>     <p>La lactancia materna aumenta la tasa de transmisi&oacute;n materno-fetal del VIH en un 14% en el caso de la madre infectada antes del parto, y en un 30% en madres infectadas despu&eacute;s de &eacute;ste. Adem&aacute;s existe evidencia de transmisi&oacute;n de 4% por cada 6 meses de lactancia.<sup>27 </sup>Debido a esto, en pa&iacute;ses industrializados no se recomienda la utilizaci&oacute;n de lactancia materna para alimentar al reci&eacute;n nacido,<sup>28 </sup>muy a pesar de los posibles beneficios a corto plazo en t&eacute;rminos de proteger contra infecciones virales y bacterianas, o a largo plazo, pues el amamantamiento parece intervenir de forma preventiva en la aparici&oacute;n de problemas m&eacute;dicos de la adultez como diabetes, enfermedades cardiovasculares y c&aacute;ncer, todas estas de alta prevalencia en dichos pa&iacute;ses.<sup>29-32 </sup></p>     <p>La discusi&oacute;n se da con respecto a los pa&iacute;ses en v&iacute;a de desarrollo. A pesar de que la lactancia materna sea responsable de la infecci&oacute;n de 300.000 ni&ntilde;os al a&ntilde;o,<sup>33 </sup>la UnICEF estima que, a nivel mundial, la falta de lactancia materna es responsable de 1,5 millones de muertes infantiles por a&ntilde;o.<sup>34 </sup>Por otra parte, la composici&oacute;n de la leche materna aporta el total de nutrientes requeridos por el ni&ntilde;o durante los primeros 6 meses de vida, adem&aacute;s, constituye una forma econ&oacute;mica y segura de alimentaci&oacute;n hasta los dos a&ntilde;os de edad, refuerza el v&iacute;nculo madre-hijo y estimula el desarrollo intelectual.<sup>35-37 </sup>Se debe hacer un cuidadoso balance riesgo vs. beneficio de la lactancia materna, individualizando cada caso con respecto a la posibilidad de trasmisi&oacute;n, la situaci&oacute;n socioecon&oacute;mica y las propiedades nutricionales que &eacute;sta aporta al ni&ntilde;o. </p>     <p>Hasta la fecha, solamente se ha realizado un estudio cl&iacute;nico controlado aleatorio sobre lactancia materna vs. leche de f&oacute;rmula. Este estudio realizado en Kenia arroj&oacute; un riesgo de transmisi&oacute;n del 16% en los primeros 24 meses de edad;<sup>28 </sup>sin embargo, se detectaron algunas limitaciones en el dise&ntilde;o del estudio con respecto a la exclusividad y a la adherencia de la lactancia materna. </p>     ]]></body>
<body><![CDATA[<p>Actualmente, ya se encuentran descritos algunos factores de riesgo fuertemente implicados en la transmisi&oacute;n del VIH debido a la lactancia materna.<sup>38-39 </sup>Entre ellos se destacan una carga alta de ARn viral, tanto en plasma como en leche materna, progresi&oacute;n cl&iacute;nica o inmunol&oacute;gica de la enfermedad en la madre (bajos niveles de CD4) y patolog&iacute;as mamarias (mastitis, abscesos, pezones fisurados).<sup>40 </sup></p>     <p><b>Recomendaciones sobre el cuidado del reci&eacute;n nacido </b></p>     <p>Todo reci&eacute;n nacido expuesto al VIH debe recibir terapia con antirretrovirales, idealmente iniciada entre 6 y 12 horas posparto, y que abarque 6 semanas de tratamiento con zidovudina.<sup>1 </sup>Se prefiere zidovudina debido a la falta de evidencia de seguridad para el reci&eacute;n nacido con los otros agentes.<sup>41 </sup>La dosis indicada para el reci&eacute;n nacido a t&eacute;rmino es 2 mg/kg v&iacute;a oral cada 6 horas o intravenoso 1,5 mg/kg cada 6 horas.<sup>15 </sup>Sin embargo, se ha informado sobre efectos negativos de la zidovudina sobre la hematopoyesis y sobre toxicidad mitocondrial con el uso de la terapia antirretroviral de alta efectividad, por lo cual se recomienda realizar en el reci&eacute;n nacido pruebas de funci&oacute;n renal, funci&oacute;n hep&aacute;tica, glucemia, electrolitos y hemoleucograma con plaquetas.<sup>42 </sup></p>     <p>Se debe realizar reacci&oacute;n en cadena de polimerasa diagn&oacute;stica para VIH al d&iacute;a 1, a las 6 semanas, y luego repetirla a las 12 semanas; si todas las anteriores son negativas, y el ni&ntilde;o no ha recibido leche materna, podemos informar a los padres que el ni&ntilde;o es VIH negativo.<sup>43 </sup>Sin embargo, la desaparici&oacute;n de anticuerpos maternos debe ser confirmada a los 18 meses de edad. La vacunaci&oacute;n se hace de forma rutinaria, esperando la confirmaci&oacute;n de la negatividad de la infecci&oacute;n para aplicar la BCG.<sup>44 </sup></p>     <p><b>Terapia antirretroviral y embarazo: consideraciones especiales </b></p>     <p>Desde el a&ntilde;o 1996, en el que se introdujeron en la pr&aacute;ctica cl&iacute;nica los medicamentos antirretrovirales, el n&uacute;mero de f&aacute;rmacos disponibles y sus posibles combinaciones, contin&uacute;an increment&aacute;ndose hoy en d&iacute;a.<sup>45 </sup>Sin embargo y frecuentemente, la evaluaci&oacute;n de la eficacia o efectividad de estos nuevos medicamentos no va sustentada por estudios de la mayor calidad metodol&oacute;gica, raz&oacute;n por la cual algunas instituciones y sociedades cient&iacute;ficas internacionales han elaborado y actualizado sus propias recomendaciones sobre el empleo de antirretrovirales.<sup>46-48 </sup></p>     <p>Las recomendaciones sobre el tratamiento de mujeres gestantes con VIH se han basado en la premisa de que las terapias con beneficios reconocidos en mujeres no deben ser modificadas durante el embarazo, excepto cuando se hayan documentado efectos adversos en la madre, feto o reci&eacute;n nacido, y estos efectos adversos superen los beneficios.<sup>49 </sup></p>     <p>Un caso para ilustrar ser&iacute;a el uso de los inhibidores de proteasa y el desarrollo de hiperglucemia. Los informes publicados hasta la fecha no han demostrado que se aument&oacute; el riesgo de desarrollo de dicha complicaci&oacute;n durante el embarazo.<sup>17 </sup>Lo mismo sucede con respecto al uso de nevirapina y riesgo de falla hep&aacute;tica, debido a que se desconoce si el embarazo aumenta el riesgo de hepatotoxicidad.<sup>50, 51 </sup></p>     <p><b>CONCLUSIONES </b></p>     <p>El cuidado de la paciente gestante con virus de inmunodeficiencia humana (VIH) requiere un abordaje integral por parte del equipo de salud tratante, donde la atenci&oacute;n debe comenzar desde el momento de ingreso de la paciente al sistema, preferiblemente en la etapa preconcepcional o durante el control prenatal, y luego continuar un manejo estricto que abarca la atenci&oacute;n del parto, la lactancia materna y los cuidados al reci&eacute;n nacido. Todo lo anterior con el fin de prevenir la transmisi&oacute;n madre-hijo. </p>     ]]></body>
<body><![CDATA[<p>Al igual que en todo paciente, se deben mantener las precauciones universales y ofrecer un ambiente de confidencialidad y respeto por la paciente y su familia. </p>     <p><b>REFERENCIAS </b></p>     <!-- ref --><p>1. Aberg JA, Kaplan JE, Libman H, Emmanuel P, Anderson JR, Stone VE, et al. Primary care guidelines for the management of persons infected with human immunodeficiency virus: 2009 update by the HIV medicine Association of the Infectious Diseases Society of America. Clin Infect Dis 2009;49:651-81.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000075&pid=S0034-7434201000030000800001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>2. Connor EM, Sperling RS, Gelber R, Kiselev P, Scott G, O'Sullivan MJ, et al. 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