<?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>0034-7515</journal-id>
<journal-title><![CDATA[Revista Cubana de Farmacia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Farm]]></abbrev-journal-title>
<issn>0034-7515</issn>
<publisher>
<publisher-name><![CDATA[Editorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-75152015000200017</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Manejo del dolor en el paciente oncológico pediátrico y factores que influyen en su percepción]]></article-title>
<article-title xml:lang="en"><![CDATA[Pain management in the pediatric oncological patient and factors influencing its perception]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallego Muñoz]]></surname>
<given-names><![CDATA[Cristóbal]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Bautista]]></surname>
<given-names><![CDATA[María José]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero Navarro]]></surname>
<given-names><![CDATA[Nieves]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero Hernández]]></surname>
<given-names><![CDATA[Irene]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Martín]]></surname>
<given-names><![CDATA[Fátima]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Manzano Martín]]></surname>
<given-names><![CDATA[María Victoria]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Universitario Puerta del Mar  ]]></institution>
<addr-line><![CDATA[Cádiz ]]></addr-line>
<country>España</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Escuela Universitaria Francisco Maldonado  ]]></institution>
<addr-line><![CDATA[Osuna ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<volume>49</volume>
<numero>2</numero>
<fpage>394</fpage>
<lpage>411</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0034-75152015000200017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0034-75152015000200017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0034-75152015000200017&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El dolor es una característica subjetiva que presentan muchos pacientes durante su estancia hospitalaria. La población pediátrica presenta unas características fisiológicas y psicológicas diferentes a la de los adultos, si a esto se le suma un proceso oncológico en el cuál son sometidos a numerosas experiencias dolorosas durante su diagnóstico y tratamiento, se hace de vital importancia un adecuado manejo del dolor. El objetivo del presente trabajo es revisar los principales factores que influyen en la percepción del dolor oncológico en el paciente pediátrico y las medidas, tanto farmacológicas no, que son necesarias tener en cuenta para un correcto manejo del dolor. Para ello se realizó una revisión de publicaciones científicas en la base de datos MEDLINE durante los últimos 25 años. Se concluye que la percepción del dolor oncológico en pediatría tiene una componente multifactorial, por otro lado, además de un uso adecuado de las medidas farmacológicas, las medidas no farmacológicas son muy importantes para el abordaje integral del dolor.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Pain is a subjective characteristic found in many patients during their hospital stay. Pediatric population presents physiological and psychological characteristics different from those of the adults. Added to this, if a cancer process is present, for which they are subjected to numerous painful experiences during their diagnosis and treatment, adequate pain management is vital. The objective of this paper was to review the main factors that influence the perception of cancer pain in the pediatric patient and both non-pharmacological and pharmacological measures that are necessary to take into account for proper pain management. To this end, a literature review was made in MEDLINE database, which covered the scientific publications of the last 25 years. It can be concluded that oncological pain perception has a multifactoral component. Furthermore, in addition to appropriate use of pharmacologic measures, non-pharmacological actions are very important for a comprehensive approach to pain.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[dolor]]></kwd>
<kwd lng="es"><![CDATA[oncología]]></kwd>
<kwd lng="es"><![CDATA[pediatría]]></kwd>
<kwd lng="en"><![CDATA[pain]]></kwd>
<kwd lng="en"><![CDATA[oncology]]></kwd>
<kwd lng="en"><![CDATA[pediatrics]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"> <font size="2" face="Verdana"></font></p>     <p align="right"><font size="2" face="Verdana"><b>FARMACODIVULGACI&#211;N</b></font></p>     <p align="left">&nbsp;</p>     <p align="left"><font size="2" face="Verdana"><b><font size="4">Manejo del dolor    en el paciente oncol&#243;gico pedi&#225;trico y factores que influyen en su    percepci&#243;n</font></b></font></p>     <p align="left">&nbsp;</p>     <p align="left"><font face="Verdana" size="3"><b>Pain management in the pediatric    oncological patient and factors influencing its perception</b></font></p>     <p align="left">&nbsp;</p>     <p align="left">&nbsp;</p>     <p><font size="2" face="Verdana"> <b>MSc. Crist&#243;bal Gallego Mu&#241;oz,<sup>I</sup>    Esp. Mar&#237;a Jos&#233; Mart&#237;nez Bautista,<sup>I</sup> Enf. Nieves Guerrero    Navarro, <sup>II</sup> Lic. Irene Romero Hern&#225;ndez,<sup>I</sup>, Lic. F&#225;tima    Garc&#237;a Mart&#237;n,<sup>I </sup>Dra. Mar&#237;a Victoria Manzano Mart&#237;n<sup>I</sup>    </b></font></p>     <p> <font size="2" face="Verdana"><sup>I</sup> Hospital Universitario Puerta del    Mar, C&#225;diz, Espa&#241;a.    ]]></body>
<body><![CDATA[<br>   </font><font size="2" face="Verdana"><sup>II </sup> Escuela Universitaria Francisco    Maldonado. Osuna, Espa&#241;a.</font></p>     <p>&nbsp;</p>     <p>&nbsp;</p> <hr>     <p><font size="2" face="Verdana"><b>RESUMEN</b> </font></p>     <p><font size="2" face="Verdana"> El dolor es una caracter&#237;stica subjetiva    que presentan muchos pacientes durante su estancia hospitalaria. La poblaci&#243;n    pedi&#225;trica presenta unas caracter&#237;sticas fisiol&#243;gicas y psicol&#243;gicas    diferentes a la de los adultos, si a esto se le suma un proceso oncol&#243;gico    en el cu&#225;l son sometidos a numerosas experiencias dolorosas durante su    diagn&#243;stico y tratamiento, se hace de vital importancia un adecuado manejo    del dolor. El objetivo del presente trabajo es revisar los principales factores    que influyen en la percepci&#243;n del dolor oncol&#243;gico en el paciente    pedi&#225;trico y las medidas, tanto farmacol&#243;gicas no, que son necesarias    tener en cuenta para un correcto manejo del dolor. Para ello se realiz&#243;    una revisi&#243;n de publicaciones cient&#237;ficas en la base de datos <i>MEDLINE</i>    durante los &#250;ltimos 25 a&#241;os. </font><font size="2" face="Verdana">Se    concluye que la percepci&#243;n del dolor oncol&#243;gico en pediatr&#237;a    tiene una componente multifactorial, por otro lado, adem&#225;s de un uso adecuado    de las medidas farmacol&#243;gicas, las medidas no farmacol&#243;gicas son muy    importantes para el abordaje integral del dolor. </font></p>     <p><font size="2" face="Verdana"><b>Palabras clave: </b> dolor, oncolog&#237;a,    pediatr&#237;a.</font></p> <hr>     <p><font size="2" face="Verdana"><b>ABSTRACT</b> </font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Pain is a subjective    characteristic found in many patients during their hospital stay. Pediatric    population presents physiological and psychological characteristics different    from those of the adults. Added to this, if a cancer process is present, for    which they are subjected to numerous painful experiences during their diagnosis    and treatment, adequate pain management is vital. The objective of this paper    was to review the main factors that influence the perception of cancer pain    in the pediatric patient and both non-pharmacological and pharmacological measures    that are necessary to take into account for proper pain management. To this    end, a literature review was made in MEDLINE database, which covered the scientific    publications of the last 25 years. It can be concluded that oncological pain    perception has a multifactoral component. Furthermore, in addition to appropriate    use of pharmacologic measures, non-pharmacological actions are very important    for a comprehensive approach to pain.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>Keywords:</b>    pain, oncology, pediatrics.</font></p> <hr>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font size="2" face="Verdana"><b><font size="3">INTRODUCCI&#211;N</font></b>    </font></p>     <p><font size="2" face="Verdana"> El dolor es una experiencia compleja, subjetiva    que es percibida de forma particular y &#250;nica por cada individuo. </font></p>     <p><font size="2" face="Verdana"> Existen factores biol&#243;gicos, psicol&#243;gicos    y sociales que van a influir en la percepci&#243;n, expresi&#243;n y tolerancia    al dolor.<sup>1,2</sup> Entre ellos se destacan la edad, el sexo, el desarrollo    cognitivo, la cultura y el aprendizaje, las experiencias previas frente al dolor    y el temperamento.<sup>1,3-8</sup> Estos factores hacen que existan variaciones    interindividuales en la percepci&#243;n, sensibilidad y tolerancia hacia el    dolor, sin embargo, el mecanismo por el que existen estas diferencias no se    conoce completamente.<sup>9</sup> </font></p>     <p><font size="2" face="Verdana"> Una mejor comprensi&#243;n de la relaci&#243;n    de estos factores con el dolor permitir&#237;a a los profesionales de la salud    abordar a los pacientes pedi&#225;tricos con dolor oncol&#243;gico de una forma    m&#225;s eficaz. </font></p>     <p><font size="2" face="Verdana"> El objetivo del presente trabajo es revisar    los principales factores que influyen en la percepci&#243;n del dolor oncol&#243;gico    en el paciente pedi&#225;trico y las medidas, farmacol&#243;gicas como no farmacol&#243;gicas,    que son necesarias tener en cuenta para un correcto manejo del dolor. Para ello    se realiz&#243; una revisi&#243;n de publicaciones cient&#237;ficas en la base    de datos <i>MEDLINE</i> durante los &#250;ltimos 25 a&#241;os. Los t&#233;rminos    usados para realizar la b&#250;squeda fueron &#8220;dolor&#8221;, &#8220;oncolog&#237;a&#8221;,    &#8220;pediatr&#237;a&#8221;, &#8220;percepci&#243;n del dolor&#8221; y &#8220;tratamiento&#8221;.    </font></p>     <p> <font size="2" face="Verdana"><br/>   FACTORES GEN&#201;TICOS </font></p>     <p><font size="2" face="Verdana"> Existen estudios gen&#233;ticos que indican    que en la percepci&#243;n del dolor de cada persona influye su propio genoma.    Zubieta et<i> al</i><sup>10</sup> demostraron en 2003 una relaci&#243;n entre    el gen <i>COM</i>T y el dolor en los seres humanos. Este estudio fue el punto    de partida para que se desarrollaran otros acerca de la relaci&#243;n del dolor    con la gen&#233;tica. Muchos confirmaron esta relaci&#243;n, y pusieron de manifiesto    su importancia en relaci&#243;n a las diferencias interindividuales respecto    a la percepci&#243;n del dolor y la respuesta frente a la toma de medicaci&#243;n    analg&#233;sica.<sup>11-16</sup> </font></p>     <p><font size="2" face="Verdana"> En definitiva, es importante utilizar los conocimientos    adquiridos sobre gen&#233;tica en el desarrollo de nuevos medicamentos, para    as&#237; poder ofrecer una atenci&#243;n individualizada a cada paciente. </font></p>     <p> <font size="2" face="Verdana"><br/>   EDAD Y SEXO </font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Existen estudios que intentan aclarar la relaci&#243;n    existente entre el dolor pedi&#225;trico y la edad del ni&#241;o, sin embargo    no coinciden todos los resultados y conclusiones de ellos. Algunos investigadores<sup>17-19    </sup>concluyen que los ni&#241;os mayores percib&#237;an el dolor con una mayor    intensidad, mientras que otros conclu&#237;an lo contrario.<sup>20,21</sup>    Estos resultados contradictorios podr&#237;an atribuirse a los diferentes rangos    de edad incluidos en los estudios. </font></p>     <p><font size="2" face="Verdana"> Algunos estudios muestran que con el aumento    de la edad se produce una percepci&#243;n de m&#225;s tipos de dolor<sup>22,23</sup>    y la percepci&#243;n del mismo es m&#225;s evidente.<sup>24,25</sup> </font></p>     <p><font size="2" face="Verdana"> Con respecto a la relaci&#243;n del sexo con    posibles diferencias en la percepci&#243;n del dolor existen algunos estudios    en los cuales se concluye que las ni&#241;as presentan mayor percepci&#243;n    del dolor que los ni&#241;os.<sup>26-29</sup> </font></p>     <p><font size="2" face="Verdana"> Zahr y Hattar-Pollara desarrollaron un estudio    en el que incluyeron ni&#241;os &#225;rabes y conclu&#237;an que el sexo tambi&#233;n    influye en la expresi&#243;n del dolor y que los varones eran menos propensos    a expresar el dolor que las hembras ya que de declararlo eran considerados d&#233;biles.<sup>30</sup>    </font></p>     <p><font size="2" face="Verdana"> En 2007, Jacob y colaboradores dise&#241;aron    un estudio descriptivo en el que analizaron la percepci&#243;n que presentaban    ante el dolor oncol&#243;gico un grupo de 49 ni&#241;os hospitalizados con edades    comprendidas entre 8 y 17 a&#241;os. Los resultados revelaron que no hab&#237;a    diferencias estad&#237;sticamente significativas en la percepci&#243;n del dolor    seg&#250;n la edad o el sexo. Un a&#241;o m&#225;s tarde, el mismo grupo de    investigaci&#243;n lleg&#243; a las mismas conclusiones en un estudio descriptivo    de corte transversal, en el que inclu&#237;an dos subgrupos de pacientes, uno    de ellos de ni&#241;os m&#225;s peque&#241;os entre 7 a 9 a&#241;os y otro de    ni&#241;os de m&#225;s edad (10-12 a&#241;os).<sup>31</sup> </font></p>     <p><font size="2" face="Verdana"> Del mismo modo, en el 2006 Kurdahi-Badr y colaboradores    confirmaron en un estudio, donde incluyeron ni&#241;os de edades comprendidas    entre 4 y 10 a&#241;os, que no exist&#237;a diferencia en la percepci&#243;n    de la intensidad del dolor oncol&#243;gico seg&#250;n la edad de los ni&#241;os.<sup>32</sup>    En la misma l&#237;nea fueron los resultados de un estudio desarrollado por    <i>Walco</i> y colaboradores en 2005, en el que estudi&#243; variables como    percepci&#243;n del dolor, angustia, observaciones de comportamiento y par&#225;metros    fisiol&#243;gicos en un grupo de 48 ni&#241;os oncol&#243;gicos sometidos a    punciones lumbares que oscilaban entre los 3 y 17 a&#241;os.<sup>33</sup> </font></p>     <p><font size="2" face="Verdana"> Sin embargo, Hechler encontr&#243; diferencias    significativas en relaci&#243;n a la percepci&#243;n de la intensidad del dolor    seg&#250;n el sexo en una cohorte con 112 adolescentes entre 12 a 18 a&#241;os    con c&#225;ncer.<sup>34</sup> En dicho estudio conclu&#237;a que las ni&#241;as    percib&#237;an una mayor intensidad de dolor que los ni&#241;os. </font></p>     <p><font size="2" face="Verdana"> M&#225;s recientemente, en 2012, Firoozi y Rostami    estudiaron<sup> </sup>la sensibilidad al dolor en ni&#241;os diagnosticados    de leucemia. A 78 ni&#241;os con edades comprendidas entre 3 y 12 a&#241;os    se les entrevist&#243; usando las escalas de comportamiento de la sensibilidad    al dolor de la infancia. Los resultados mostraron que los ni&#241;os y ni&#241;as    m&#225;s j&#243;venes presentaban una mayor sensibilidad al dolor.<sup>35</sup>    </font></p>     <p><font size="2" face="Verdana"> En 2004, Van Cleve y colaboradores<sup> </sup>llevaron    a cabo un estudio con ni&#241;os con leucemia. Se hicieron dos subgrupos uno    con ni&#241;os entre 4 y 7 a&#241;os y otro con ni&#241;os entre 8 y 17 a&#241;os.    Los padres refirieron un mayor n&#250;mero de estrategias de afrontamiento del    dolor en el subgrupo de ni&#241;os m&#225;s peque&#241;os. Con respecto al sexo,    las ni&#241;as presentaban mayor n&#250;mero de estrategias de afrontamiento    que los ni&#241;os.<sup>36</sup> </font></p>     <p> <font size="2" face="Verdana"><br/>   DESARROLLO COGNITIVO </font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> El desarrollo cognitivo es el proceso mediante    el cual una persona adquiere capacidad para entender los diferentes aspectos    del mundo que le rodea en funci&#243;n de su edad y de la experiencia adquirida.    Es un aspecto que influye en la percepci&#243;n del dolor y en la expresi&#243;n    del mismo en los ni&#241;os.<sup>37</sup> </font></p>     <p><font size="2" face="Verdana"> Gaffney y Dunne<sup>38</sup> en 1986 realizaron    un estudio en el que dividieron a una cohorte de ni&#241;os irlandeses en tres    grupos de edad (5-7 a&#241;os, 8-10 a&#241;os y 11-14 a&#241;os). Estos grupos    de edades se correspond&#237;an con las etapas de <i>Piaget</i> en relaci&#243;n    al desarrollo cognitivo de los ni&#241;os (etapa preoperacional, etapa de las    operaciones concretas y etapa de las operaciones formales). Demostr&#243; que    el desarrollo cognitivo influ&#237;a en la percepci&#243;n del dolor y la expresi&#243;n    del mismo. </font></p>     <p><font size="2" face="Verdana"> Crow<sup>39</sup> en 1997 y m&#225;s tarde Cheng    y colaboradores<sup>40</sup> en el 2003, conclu&#237;an en sus estudios que    la percepci&#243;n del dolor por parte de los ni&#241;os y su expresi&#243;n    depend&#237;a del desarrollo cognitivo y se correspond&#237;a con las etapas    de <i>Piaget</i>. </font></p>     <p><font size="2" face="Verdana"> Los resultados de estos estudios dilucidaron    la adquisici&#243;n gradual del concepto de dolor seg&#250;n las sucesivas etapas    de <i>Piaget </i>en relaci&#243;n al desarrollo cognitivo, y ponen de manifiesto    la relaci&#243;n que existe entre ambas variables. </font></p>     <p><font size="2" face="Verdana"> Adem&#225;s, conforme los ni&#241;os crecen,    el vocabulario para expresar el dolor que perciben se hace m&#225;s rico y con    m&#225;s matices. Algunos autores concluyen en sus estudios que conforme el    ni&#241;o crece y madura utiliza un mayor vocabulario para expresar el dolor.<sup>22,23    </sup> </font></p>     <p> <font size="2" face="Verdana"><br/>   CULTURA Y CREENCIAS </font></p>     <p><font size="2" face="Verdana"> La cultura y las normas sociales aprendidas    durante la infancia pueden influir en la expresi&#243;n del dolor por parte    del ni&#241;o, de tal forma que el ni&#241;o puede aceptar o no el dolor percibido    y expresarlo de diferente forma.<sup>41</sup> En definitiva, los ni&#241;os    responden de acuerdo con los modelos de comportamiento aprendido. En algunas    culturas, cuando una persona expresa el dolor percibido mediante llanto puede    ser recompensado con caricias, mientras que en otras culturas, esa misma respuesta    conductual puede ser penalizada o ignorada.<sup>42</sup> </font></p>     <p><font size="2" face="Verdana"> Por ejemplo, en la cultura &#225;rabe, los padres    educan a sus hijos de acuerdo con sus valores y creencias, de tal forma que    transmiten a sus descendientes comportamientos y rezos con los que evitar el    llanto.<sup>30</sup> Varios estudios<sup>43,44</sup> en la cultura taiwanesa    o tailandesa se instruye a los ni&#241;os a ser pacientes y a soportar el dolor,    consider&#225;ndose el llanto como un comportamiento no apropiado, ocupando    el uso de analg&#233;sicos un segundo plano por detr&#225;s de las medidas no    farmacol&#243;gicas. </font></p>     <p><font size="2" face="Verdana"> Abu-Saad<sup>45</sup> en 1984 estudi&#243; durante    seis meses la experiencia ante el dolor en 72 ni&#241;os de cultura &#225;rabe,    asi&#225;tica y latinoamericana de edades comprendidas entre los 9 y 12 a&#241;os,    todos ellos residentes en Estados Unidos. Los resultados no mostraron diferencias    estad&#237;sticamente significativas entre los tres grupos &#233;tnicos, lo    que sugiere que los ni&#241;os podr&#237;an haber sido influenciados por la    cultura americana predominante. </font></p>     <p><font size="2" face="Verdana"> Pfefferbaum y colaboradores (1990), no encontraron    diferencias en la percepci&#243;n y expresi&#243;n del dolor entre un grupo    de ni&#241;os de origen hispano y otro de raza blanca.<sup> </sup>Sin embargo,    los padres hispanos presentaban mayores niveles de ansiedad que los padres de    raza blanca.<sup>46</sup> </font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Tambi&#233;n es importante resaltar la influencia    de las creencias religiosas y valores filos&#243;ficos en relaci&#243;n a la    expresi&#243;n del dolor. Mientras que algunas religiones creen que el sufrimiento    y la enfermedad son el resultado del pecado, otros piensan que el dolor y el    sufrimiento fortalecen, iluminan y purifican el alma.<sup>47</sup> Por lo tanto,    seg&#250;n McDonald (1994), es muy importante conocer las creencias religiosas    y filos&#243;ficas de la familia, y as&#237; poder evitar una inadecuada valoraci&#243;n    del dolor en los ni&#241;os y un tratamiento no apropiado.<sup>48</sup> </font></p>     <p><font size="2" face="Verdana"> Aunque la evidencia emp&#237;rica es limitada    con respecto a las implicaciones culturales de la evaluaci&#243;n del dolor    en los ni&#241;os, la experiencia, la expresi&#243;n y la reacci&#243;n al dolor    se ven afectados por la cultura del ni&#241;o y el contexto cultural en el que    es educad.<sup>49</sup> </font></p>     <p><font size="2" face="Verdana"> Se puede concluir que aunque la evidencia existente    demuestra que la relaci&#243;n entre la cultura y la educaci&#243;n del ni&#241;o    con la expresi&#243;n del dolor es limitada, s&#237; existen indicios que las    relacionan. </font></p>     <p> <font size="2" face="Verdana"><br/>   EXPERIENCIA PREVIA CON EL DOLOR </font></p>     <p><font size="2" face="Verdana"> La experiencia previa ante el dolor es, entre    otros, un factor predictivo de la percepci&#243;n del dolor por el ni&#241;o    en un proceso oncol&#243;gico. La experiencia previa de un ni&#241;o ante el    dolor influye en su reacci&#243;n a los acontecimientos dolorosos futuros.<sup>50,51</sup>    La sensibilidad ante el dolor aumenta cuando los ni&#241;os est&#225;n expuestos    a est&#237;mulos dolorosos repetidos y han sufridos experiencias previas negativas.<sup>52</sup>    Un manejo eficaz ante las experiencias dolorosas previas anteriores influir&#225;    en el futuro en la percepci&#243;n del dolor.<sup>8,50,53</sup> </font></p>     <p><font size="2" face="Verdana">     <br>   TEMPERAMENTO </font></p>     <p><font size="2" face="Verdana"> El temperamento se define como la forma de comportarse    de una persona ante distintos acontecimientos de la vida. Es otro de los factores    que influyen en la percepci&#243;n del dolor en ni&#241;os,<sup>8</sup> aunque    los estudios al respecto son escasos. Hay estudios que demuestran esta relaci&#243;n    en ni&#241;os sometidos a una variedad de procedimientos invasivos como son    punciones venosas<sup>54-56 </sup>vacunaciones<sup>57</sup> y cirug&#237;a.<sup>58-60</sup>    </font></p>     <p> <font size="2" face="Verdana"><i>Broome </i> y colaboradores en 1998 encontraron    asociaci&#243;n entre el temperamento con una mayor intensidad del dolor y la    angustia.<sup>61</sup> </font></p>     <p><font size="2" face="Verdana"> En resumen, existe evidencia de que la percepci&#243;n    y la respuesta al dolor del ni&#241;o se ven influenciados por una serie de    factores biol&#243;gicos, psicol&#243;gicos y sociales como la edad, el g&#233;nero,    el desarrollo cognitivo, la cultura y el aprendizaje, los genes, las experiencias    previas del ni&#241;o ante el dolor y su temperamento. Estos factores ayudan    a los profesionales de la salud a comprender por qu&#233; los ni&#241;os, ante    similares est&#237;mulos dolorosos, se comportan de manera diferente. En consecuencia,    es esencial que los profesionales de la salud tengan en cuenta estos factores    al evaluar y manejar el dolor oncol&#243;gico en ni&#241;os.<sup>8</sup> </font></p>     ]]></body>
<body><![CDATA[<p> <font size="2" face="Verdana"><br/>   MANEJO DEL DOLOR ONCOL&#211;GICO EN NI&#209;OS </font></p>     <p><font size="2" face="Verdana"> El dolor oncol&#243;gico tiene una etiolog&#237;a    multifactorial y se puede presentar en contextos cl&#237;nicos muy distintos,    por lo que requiere el empleo de diferentes estrategias. En este enfoque integral    del tratamiento del dolor oncol&#243;gico se incluyen tanto medidas farmacol&#243;gicas    como no farmacol&#243;gicas, y es el est&#225;ndar de atenci&#243;n seg&#250;n    la Organizaci&#243;n Mundial de la Salud (OMS).<sup>62</sup> La OMS, a partir    de la evidencia disponible, unifica criterios y publica en 1998 unas directrices    con las que pretende una aplicaci&#243;n a nivel mundial de estos principios    bajo el t&#237;tulo <i>Cancer Pain Relief and Palliative Care in Children</i>.<sup>63    </sup>Seg&#250;n Liossi<sup>64</sup> (1999) estos principios sobre el manejo    del dolor oncol&#243;gico en ni&#241;os deben ser la base de los protocolos    de manejo del dolor en esta poblaci&#243;n. Una revisi&#243;n realizada en 2012    por Pummer en la que se inclu&#237;an 168 art&#237;culos publicados en 15 a&#241;os    dilucid&#243; que los protocolos del tratamiento del dolor oncol&#243;gico en    su mayor&#237;a siguen las directrices de la OMS.<sup>65</sup> </font></p>     <p><font size="2" face="Verdana"> Durante la historia natural de un proceso oncol&#243;gico,    los pacientes pedi&#225;tricos se enfrentan a procedimientos dolorosos, ya sea    en el diagn&#243;stico o tratamiento. Existen estudios que concluyen que durante    dichos procesos el dolor es el factor m&#225;s dif&#237;cil de asumir para los    pacientes pedi&#225;tricos.<sup>63,66</sup> La exposici&#243;n frecuente a los    mismos procedimientos no producen desensibilizaci&#243;n al dolor o angustia<sup>53,66,67    </sup>y los ni&#241;os no llegan a adaptarse a dichos procedimientos dolorosos.<sup>68-70</sup>    El uso de procedimientos diagn&#243;sticos complejos desencadena en el ni&#241;o    un comportamiento antisocial que puede repercutir negativamente en su bienestar    e incluso puede ser un obst&#225;culo para el cumplimiento del tratamiento.<sup>71</sup>    </font></p>     <p><font size="2" face="Verdana"> Es de esperar que un paciente pedi&#225;trico    que experimente una experiencia negativa previa con un procedimiento determinado,    cuando m&#225;s adelante vuelva a experimentar dicho procedimiento se produzca    un aumento en la intensidad del dolor percibido.<sup>52</sup> Los estudios disponibles    sobre el tratamiento del dolor oncol&#243;gico en el paciente pedi&#225;trico    se llevaron a cabo principalmente en el contexto del dolor relacionado con los    procedimientos invasivos durante el proceso oncol&#243;gico. Por lo tanto, una    gesti&#243;n eficaz de estos procedimientos dolorosos y un correcto manejo de    herramientas, tanto no farmacol&#243;gicas como farmacol&#243;gicas, se vislumbra    de vital importancia y reducir&#237;a el dolor experimentado en esta poblaci&#243;n.<sup>63,72</sup>    </font></p>     <p> <font size="2" face="Verdana"><br/>   M&#201;TODOS FARMACOL&#211;GICOS </font></p>     <p><font size="2" face="Verdana"> Las bases del tratamiento farmacol&#243;gico    utilizado en el manejo del dolor oncol&#243;gico siguen principalmente las directrices    marcadas por la OMS a trav&#233;s de la escalera de analgesia en tres pasos.<sup>73</sup>    Algunos autores demuestran que la aplicaci&#243;n de estas pautas resulta eficaz    para el alivio del dolor oncol&#243;gico en pacientes pedi&#225;tricos.<sup>65,74-76    </sup>Como parte de un programa de mejora de la calidad en el manejo del dolor    oncol&#243;gico pedi&#225;trico, un estudio realizado en Alemania<sup>76</sup>    demostr&#243; que la adecuaci&#243;n a la escalera de analgesia en tres pasos    de la OMS proporcionaba un correcto manejo del dolor. Por otro lado, en un estudio    en 2005 se concluy&#243; que el cumplimiento de las recomendaciones de la OMS    proporcionaba un manejo eficaz del dolor en la mayor parte de la cohorte (97    %), resultados similares se encontraron en estudios m&#225;s recientes.<sup>77,78</sup>    </font></p>     <p><font size="2" face="Verdana"> El dolor en el paciente pedi&#225;trico se atribuye    principalmente a protocolos con tratamientos prolongados y agresivos tanto de    quimioterapia como de radioterapia. Estos tratamientos conllevan procedimientos    invasivos que en muchas ocasiones se perciben con m&#225;s intensidad de dolor    que el propio proceso cancer&#237;gen,<sup>79,80</sup> en consecuencia, una    gesti&#243;n eficaz de estos procedimientos disminuir&#225; la experiencia dolorosa    de la poblaci&#243;n pedi&#225;trica.<sup>81</sup> La OMS a trav&#233;s de su    publicaci&#243;n <i>Cancer Pain Relief and Palliative Care in Children</i> proporciona    directrices en el manejo del dolor durante los procedimientos, que va desde    la analgesia local a la general, y todo ello depende del car&#225;cter invasivo    del procedimiento. </font></p>     <p><font size="2" face="Verdana"> La anestesia local se considera como una opci&#243;n    muy conveniente y pr&#225;ctica en ni&#241;os de todas las edades.<sup>64 </sup>Las    alternativas m&#225;s frecuentemente usadas son anest&#233;sicos de administraci&#243;n    t&#243;pica de la crema EMLA, formulaci&#243;n que contiene lidoca&#237;na y    priloca&#237;na y parches e inyecciones con lidoca&#237;na subcut&#225;nea.<sup>64,82-84</sup>    </font></p>     <p><font size="2" face="Verdana"> Liungman y colaboradores<sup>85</sup> en 1999    realizaron un estudio observacional en el que incluyeron a 55 ni&#241;os oncol&#243;gicos.    A los ni&#241;os se les administr&#243; crema EMLA antes de los procedimientos    invasivos. Los resultados revelaron que el dolor se manejaba eficazmente en    el 98 % de los ni&#241;os antes de una punci&#243;n venosa, y en el 85 % antes    de una inyecci&#243;n intramuscular. Varios estudios<sup>86-88 </sup>demuestran    que la crema EMLA es eficaz en procedimientos en los que se realiza una punci&#243;n,    como las inyecciones subcut&#225;neas o las punciones venosas. </font></p>     <p><font size="2" face="Verdana"> La combinaci&#243;n sedaci&#243;n&#8210;analgesia    result&#243; ser eficaz en procedimientos invasivos como la punci&#243;n lumbar    (PL) y la bi&#243;psia de m&#233;dula &#243;sea (BMO). Ljungman y colaboradores<sup>85</sup>    en 1999 concluyeron en su estudio que los ni&#241;os sometidos a una PL o a    una BMO bajo sedaci&#243;n consciente experimentaban un dolor comparable a un    pinchazo de aguja. M&#225;s recientemente Dufresne<sup>89 </sup>confirm&#243;    la eficacia de la combinaci&#243;n de sedaci&#243;n&#8210;analgesia (inyecci&#243;n    local de lidoca&#237;na+EMLA+sedaci&#243;n consciente) en la reducci&#243;n    del dolor. Dieciocho ni&#241;os con c&#225;ncer (6-17 a&#241;os) recibieron    sedaci&#243;n intravenosa de baja a moderada intensidad antes de someterse a    procedimientos invasivos, los resultados revelaron bajos niveles de percepci&#243;n    del dolor y de miedo, tras entrevistarles y aplicarles escalas espec&#237;ficas    como <i>Faces Pain Scale Revised (FPA-R), Visual Analogic Scale (VAS) y State    Trait Anxiety Inventory for Children (STAI).</i> </font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> En 2012 se llev&#243; a cabo en Italia un estudio<sup>90</sup>    multic&#233;ntrico para analizar y evaluar los procedimientos que se llevaban    a cabo en el manejo del dolor oncol&#243;gico en pediatr&#237;a, los resultados    mostraron que la combinaci&#243;n de sedaci&#243;n y analgesia empleada en procedimientos    como la PL y la BMO fue satisfactoria, aunque su uso fue bajo debido a la falta    de recursos en personal, equipos e instalaciones. La anestesia general se utiliza    generalmente durante procedimientos en los que se produzca un dolor severo y    se recomienda para el manejo del dolor en dichos procedimientos, sobre todo    la PL y la BMO. </font></p>     <p><font size="2" face="Verdana"> En el tratamiento del dolor severo producido    durante procedimientos invasivos es importante el manejo de medidas farmacol&#243;gicas,    pero tambi&#233;n las medidas no farmacol&#243;gicas poseen un papel primordial.    Un importante n&#250;mero de estudios demuestran que la combinaci&#243;n de    las dos intervenciones es m&#225;s efectiva que el empleo de una s&#243;la.<sup>91-95</sup>    </font></p>     <p> <font size="2" face="Verdana"><br/>   M&#201;TODOS NO FARMACOL&#211;GICOS </font></p>     <p><font size="2" face="Verdana"> Las terapias complementarias no farmacol&#243;gicas    o intervenciones psicol&#243;gicas, son a menudo consideradas como medicina    complementaria y alternativa (MCA). La MCA se puede utilizar en los ni&#241;os    con c&#225;ncer como un complemento al trata miento farmacol&#243;gico convencional.<sup>63,96-101    </sup>Estas medidas ser&#225;n eficaces si se desarrollan en funci&#243;n de    la edad del ni&#241;o, los que adquirir&#225;n herramientas para poder enfrentarse    a situaciones dolorosas de la mejor forma posible. </font></p>     <p><font size="2" face="Verdana"> Existen una serie de m&#233;todos no farmacol&#243;gicos    eficaces en el manejo del dolor oncol&#243;gico en ni&#241;os; las terapias    cuerpo&#8210;mente surgieron como objeto de estudio del manejo del dolor oncol&#243;gico    pedi&#225;trico.<sup>102</sup> Estas terapias se basan en la premisa de que    existe una interacci&#243;n entre el cuerpo y la mente, y toda herramienta encaminada    a controlar factores emocionales, espirituales, sociales y de comportamiento    influyen de forma directa en signos y s&#237;ntomas corporales.<sup>103</sup>    Las terapias no farmacol&#243;gicas m&#225;s estudiadas y utilizadas en el manejo    del dolor oncol&#243;gico en ni&#241;os durante procedimientos invasivos son    la hipnosis, la distracci&#243;n y la imaginaci&#243;n guiada.<sup>102,103</sup>    </font></p>     <p><font size="2" face="Verdana"> La hipnosis es una herramienta efectiva donde    el paciente es guiado para reaccionar ante los pensamientos que acarrean cambios    en la percepci&#243;n, la emoci&#243;n, la conducta y las sensaciones. La literatura    apoya este m&#233;todo en el manejo del dolor por c&#225;ncer en la poblaci&#243;n    pedi&#225;trica. Richardson y colaboradores<sup>104</sup> en 2006 publicaron    una revisi&#243;n en la que analizaban cinco ensayos controlados y aleatorizados    en los que se evaluaba el empleo de hipnosis en el control del dolor oncol&#243;gico    en ni&#241;os y demostraron que la hipnosis era una herramienta cl&#237;nicamente    valiosa para el manejo del dolor oncol&#243;gico en pediatr&#237;a. </font></p>     <p><font size="2" face="Verdana"> Otros estudios<sup>94,105,106 </sup>demuestran    la eficacia de este m&#233;todo en la disminuci&#243;n de la angustia y el dolor    en ni&#241;os con c&#225;ncer sometidos a procedimientos invasivos durante el    proceso de la enfermedad como la PL, BMO y las punciones venosas, adem&#225;s    de otros estudios que demuestran de la utilidad de la hipnosis en remitir las    n&#225;useas y los v&#243;mitos asociados a quimioterapia durante el tratamiento    de ni&#241;os con c&#225;ncer.<sup>107-109</sup> </font></p>     <p><font size="2" face="Verdana"> La distracci&#243;n es una t&#233;cnica poderosa    como estrategia de afrontamiento del dolor oncol&#243;gico, cuyo objetivo es    centrar la atenci&#243;n del ni&#241;o durante el proceso que le produce dolor.<sup>106</sup>    Existen diferentes t&#233;cnicas estudiadas y empleadas para producir distracci&#243;n    en el ni&#241;o y van desde estrategias sencillas como el empleo de pompas de    jab&#243;n<sup>110,111</sup> hasta t&#233;cnicas m&#225;s sofisticadas como    el uso de juegos de realidad virtual.<sup>112-115</sup> En numerosos estudios    se ha concluido que el empleo de t&#233;cnicas de distracci&#243;n disminuye    la angustia en los ni&#241;os y el dolor durante procedimientos invasivos como    la PL, la BMO o punciones venosas.<sup>91,92,115,116</sup> </font></p>     <p><font size="2" face="Verdana"> La imaginaci&#243;n guiada y la m&#250;sica    demuestran tambi&#233;n ser eficaces en el control del dolor oncol&#243;gico    en ni&#241;os. La imaginaci&#243;n guiada es un proceso a trav&#233;s del cual    se trata que el ni&#241;o imagine estar presente en una situaci&#243;n m&#225;s    agradable.<sup>117</sup> La m&#250;sica es la herramienta de distracci&#243;n    m&#225;s empleada en el manejo del dolor en ni&#241;os. Nguyen<sup>118</sup>    en el 2010 ejecut&#243; un ensayo cl&#237;nico para demostrar la posible relaci&#243;n    de la m&#250;sica para mitigar el dolor oncol&#243;gico. Para ello ramdomiz&#243;    40 ni&#241;os (7-12 a&#241;os) en dos grupos; a los ni&#241;os del grupo de    intervenci&#243;n los someti&#243; a audiciones durante el proceso y a los del    grupo control no. Las variables estudiadas fueron: percepci&#243;n del dolor,    percepci&#243;n de la ansiedad, en ambos casos mediante escalas, frecuencia    cardiaca, presi&#243;n arterial, frecuencia respiratoria y saturaci&#243;n de    ox&#237;geno. Estas variables se midieron antes, durante y despu&#233;s de los    procedimientos invasivos. Los resultados mostraron que los ni&#241;os del grupo    con m&#250;sica presentaban menos percepci&#243;n del dolor, menor frecuencia    cardiaca, menor frecuencia respiratoria y menor ansiedad. </font></p>     <p><font size="2" face="Verdana"> Otras intervenciones cuerpo-mente utilizadas    en el tratamiento del dolor oncol&#243;gico pedi&#225;trico incluyen la participaci&#243;n    de los padres. Weekes<sup>119</sup> en 1993 se propuso demostrar la utilidad    que tiene darle la mano al paciente pedi&#225;trico con c&#225;ncer que experimenta    dolor relacionado con el tratamiento. En el estudio intervinieron 10 pacientes    con c&#225;ncer y 10 pacientes con enfermedad renal (11&#8210;19 a&#241;os).    Los resultados mostraron que en ambos grupos, el hecho de que le den la mano    durante el proceso, hace que perciban menos dolor. Este hecho se puede considerar    como una herramienta de distracci&#243;n y que les proporciona seguridad, disminuye    la tensi&#243;n asociada al proceso y hace que disminuya el dolor percibido.    </font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> En 2012, Po y colaboradores<sup>90</sup> llevaron    a cabo en Italia un estudio multic&#233;ntrico (36 centros) para evaluar el    dolor oncol&#243;gico en ni&#241;os y concluyen que la presencia de los padres    durante los procedimientos invasivos disminu&#237;a la angustia y ansiedad en    los ni&#241;os. En el mismo a&#241;o, McCarthy<sup>84</sup> conclu&#237;a con    su estudio realizado en ni&#241;os de edades comprendidas entre los 5 meses    y los 19 a&#241;os, que la presencia de cuidadores durante el proceso ayuda    al ni&#241;o a sobrellevar mejor la experiencia dolorosa. En un an&#225;lisis    por subgrupos, los ni&#241;os m&#225;s peque&#241;os eran m&#225;s propensos    a mostrar angustia y requer&#237;an m&#225;s apoyo durante las situaciones dolorosas.    Estos resultados de McCarthy, que confirmaban los resultados de &#197;ngstr&#246;m-Br&#228;nnstr&#246;m<sup>120</sup>    en 2008, suger&#237;an que los ni&#241;os se sent&#237;an m&#225;s seguros con    la presencia de sus padres, especialmente en la de su madre. </font></p>     <p><font size="2" face="Verdana">Las t&#233;cnicas de relajaci&#243;n y respiraci&#243;n    tambi&#233;n demuestran ser &#250;tiles en una menor percepci&#243;n del dolor    en ni&#241;os con c&#225;ncer.<sup>117</sup> </font></p>     <p><font size="2" face="Verdana"> Una combinaci&#243;n de tratamientos farmacol&#243;gicos    y no farmacol&#243;gicos propician los mejores resultados en el manejo del dolor    oncol&#243;gico en ni&#241;os. En una revisi&#243;n en 2010, Landier y Tse<sup>121</sup>    concluyen que el empleo la MCA junto al tratamiento farmacol&#243;gico ofrecen    los mejores resultados para reducir el dolor, la angustia y la ansiedad en ni&#241;os    y adolescentes con dolor oncol&#243;gico. El uso de la MCA se emplea con m&#225;s    frecuencia seg&#250;n estudios en oncolog&#237;a pedi&#225;trica; sin embargo,    su pr&#225;ctica entre las distintas poblaciones estudiadas es diferente seg&#250;n    la cultura y creencia de personas que forman esa sociedad. </font></p>     <p>&nbsp; </p>     <p><font size="2" face="Verdana"><b><font size="3">CONCLUSIONES</font></b> </font></p>     <p><font size="2" face="Verdana"> En la percepci&#243;n de dolor oncol&#243;gico    en pediatr&#237;a influyen multitud de factores, unos son independientes y no    modificables como la gen&#233;tica y otros de &#237;ndole cultural y relacionados    con el aprendizaje como el desarrollo cognitivo, cultura y creencia, experiencia    previa con el dolor y temperamento. </font></p>     <p><font size="2" face="Verdana"> Con respecto al tratamiento del dolor oncol&#243;gico    en pediatr&#237;a las medidas no farmacol&#243;gicas resultan muy importantes    si se combinan con las farmacol&#243;gicas, con el fin de realizar un manejo    integral del dolor en el ni&#241;o y obtener unos resultados &#243;ptimos durante    su manejo. </font></p>     <p>&nbsp; </p>     <p><font size="2" face="Verdana"><b><font size="3">REFERENCIAS</font></b> <font size="3"><b>BIBLIOGR&#193;FICAS</b></font>    </font></p>     <!-- ref --><p><font size="2" face="Verdana"> 1. 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<body><![CDATA[<p>&nbsp;</p>     <p><font size="2" face="Verdana"><i>Crist&#243;bal Gallego Mu&#241;oz.</i> Farmacia    Hospitalaria. Primera planta. Hospital Universitario Puerta del Mar, 11009 C&#225;diz,    Espa&#241;a. Tel&#233;fono: 34 956 00 3089.     <br>   Correo electr&#243;nico: <a href="mailto:toba_gallego@hotmail.com">toba_gallego@hotmail.com</a>    </font></p>        ]]></body><back>
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