<?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>0034-7450</journal-id>
<journal-title><![CDATA[Revista Colombiana de Psiquiatría]]></journal-title>
<abbrev-journal-title><![CDATA[rev.colomb.psiquiatr.]]></abbrev-journal-title>
<issn>0034-7450</issn>
<publisher>
<publisher-name><![CDATA[Asociacion Colombiana de Psiquiatria.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-74502012000100011</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Consentimientos informados y aprobación por parte de los comités de ética en los estudios de antipsicóticos atípicos para el manejo del delírium]]></article-title>
<article-title xml:lang="en"><![CDATA[Informed Consent and the Approval by Ethics Committees of Studies Involving the Use of Atypical Antipsychotics in the Management of Delirium]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Millán-González]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Pontificia Universidad Javeriana Hospital Nacional de Geriatría y Gerontología Universidad de Costa Rica]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2012</year>
</pub-date>
<volume>41</volume>
<numero>1</numero>
<fpage>150</fpage>
<lpage>164</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74502012000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74502012000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74502012000100011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción: El delírium es una alteración aguda de la conciencia y la cognición que ha empezado a manejarse con antipsicóticos atípicos (AA). Debido a que las facultades mentales, por definición, se ven afectadas, los estudios en esta población generan dilemas éticos respecto a la participación voluntaria de los pacientes y su estado de vulnerabilidad. Objetivo: Valorar si los estudios realizados con AA para el tratamiento del delírium obtuvieron una aprobación por un comité de ética en investigación en seres humanos (CEISH), si hubo aplicación de un consentimiento informado (CI), si este era verbal o escrito y quién dio la aprobación para la participación en el protocolo. Diseño: Revisión sistemática en MedLine de los estudios de delírium que emplearon quetiapina y olanzapina y valoración de la existencia de aprobación por un CEISH y de la aplicación de un CI. Resultados: Se detectaron 11 estudios (6 de quetiapina y 5 de olanzapina), de los cuales 5 contaron con la aprobación del protocolo por un CEISH. Conclusiones: La mayoría de los estudios para el tratamiento del delírium no fueron sometidos a su aprobación por parte de un CEISH ni obtuvieron (de forma exclusiva) el CI de participación por parte del apoderado legal del paciente. Es fundamental que los futuros estudios de antipsicóticos y otros fármacos cuenten con la aprobación del protocolo por parte de un CEISH y de la firma del CI por parte del representante legal del paciente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction: Delirium is an acute alteration of consciousness and cognition. Atypical antipsychotics (AA) have recently become a main part of its treatment. Studies in this population generate a series of ethical dilemmas concerning the voluntary participation of patients and their state of vulnerability since their mental faculties are, by definition, compromised. Objective: To assess whether studies with AA for the treatment of delirium obtained an approval by an ethics committee on human research (ECHR), if an informed consent (IC) was obtained, whether the IC was verbal or written, and who gave the approval to participate. Method: Systematic review of Medline for studies of delirium where quetiapine and olanzapine were the main treatment, assessing the existence of an ECHR approval and implementation of an IC. Results: 11 studies were identified (6 of quetiapine and 5 of olanzapine). 5 had an ECHR approval. Conclusions: Most studies examining the treatment of delirium with quetiapine or olanzapine were not subject to approval by an ECHR and most of them did not obtain an IC from the patient's legal guardian. It is essential that future studies of antipsychotics and other drugs for the treatment of delirium have the protocol approved by an ECHR and a written IC signed by the patient's legal representative, since by definition delirium is a condition that compromises superior mental processes.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Delírium]]></kwd>
<kwd lng="es"><![CDATA[quetiapina]]></kwd>
<kwd lng="es"><![CDATA[olanzapina]]></kwd>
<kwd lng="es"><![CDATA[consentimiento informado]]></kwd>
<kwd lng="es"><![CDATA[comités de ética]]></kwd>
<kwd lng="en"><![CDATA[Delirium]]></kwd>
<kwd lng="en"><![CDATA[quetiapine]]></kwd>
<kwd lng="en"><![CDATA[olanzapine]]></kwd>
<kwd lng="en"><![CDATA[informed consent]]></kwd>
<kwd lng="en"><![CDATA[ethics committees]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <FONT size="2" face="verdana">      <p>Art&iacute;culos de revisi&oacute;n/actualizaci&oacute;n</p>      <P align="center"><FONT size="4"><b>Consentimientos informados y aprobaci&oacute;n por parte de los comit&eacute;s de &eacute;tica en los estudios de antipsic&oacute;ticos at&iacute;picos para el manejo del del&iacute;rium</b></FONT></p>     <P align="center"><FONT size="3"><b>Informed Consent and the Approval by Ethics Committees of Studies Involving the Use of Atypical Antipsychotics in the Management of Delirium</b></FONT></p>      <p>    <center>Ricardo Mill&aacute;n-Gonz&aacute;lez<sup>1</sup></center></p>     <br>      <p><sup>1</sup>M&eacute;dico psiquiatra, Universidad de Costa Rica, San Jos&eacute;, Costa Rica. Especialista en Psiquiatr&iacute;a de Enlace, Pontificia Universidad Javeriana, Bogot&aacute;, Colombia. M&eacute;dico asistente especialista del Hospital Nacional de Geriatr&iacute;a y Gerontolog&iacute;a. Profesor de la Universidad de Costa Rica. San Jos&eacute;, Costa Rica.</p>      <p><i>Conflictos de inter&eacute;s: El autor manifiesta que no tiene conflictos de inter&eacute;s en este art&iacute;culo.</i></p>      <p>Correspondencia    ]]></body>
<body><![CDATA[<br> <i>Ricardo Mill&aacute;n-Gonz&aacute;lez</i>    <br> <i>2579-2050, San Pedro de Montes de Oca</i>    <br> <i>San Jos&eacute;, Costa Rica</i>    <br> <a href="mailto:ricardo.millangonzalez@ucr.ac.cr"><i>ricardo.millangonzalez@ucr.ac.cr</i></a></p>      <p><i>Recibido para evaluaci&oacute;n: </i>4 de mayo del 2011 <i>Aceptado para publicaci&oacute;n: </i>12 de octubre del 2011</p>   <hr>     <p><font size="3"><b>Resumen</b></font></p>     <p><i>Introducci&oacute;n: </i>El del&iacute;rium es una alteraci&oacute;n aguda de la conciencia y la cognici&oacute;n que ha empezado a manejarse con antipsic&oacute;ticos at&iacute;picos (AA). Debido a que las facultades mentales, por definici&oacute;n, se ven afectadas, los estudios en esta poblaci&oacute;n generan dilemas &eacute;ticos respecto a la participaci&oacute;n voluntaria de los pacientes y su estado de vulnerabilidad. <i>Objetivo: </i>Valorar si los estudios realizados con AA para el tratamiento del del&iacute;rium obtuvieron una aprobaci&oacute;n por un comit&eacute; de &eacute;tica en investigaci&oacute;n en seres humanos (CEISH), si hubo aplicaci&oacute;n de un consentimiento informado (CI), si este era verbal o escrito y qui&eacute;n dio la aprobaci&oacute;n para la participaci&oacute;n en el protocolo. <i>Dise&ntilde;o: </i>Revisi&oacute;n sistem&aacute;tica en MedLine de los estudios de del&iacute;rium que emplearon quetiapina y olanzapina y valoraci&oacute;n de la existencia de aprobaci&oacute;n por un CEISH y de la aplicaci&oacute;n de un CI. <i>Resultados: </i>Se detectaron 11 estudios (6 de quetiapina y 5 de olanzapina), de los cuales 5 contaron con la aprobaci&oacute;n del protocolo por un CEISH. <i>Conclusiones: </i>La mayor&iacute;a de los estudios para el tratamiento del del&iacute;rium no fueron sometidos a su aprobaci&oacute;n por parte de un CEISH ni obtuvieron (de forma exclusiva) el CI de participaci&oacute;n por parte del apoderado legal del paciente. Es fundamental que los futuros estudios de antipsic&oacute;ticos y otros f&aacute;rmacos cuenten con la aprobaci&oacute;n del protocolo por parte de un CEISH y de la firma del CI por parte del representante legal del paciente.</p>     <p><b>Palabras clave: </b>Del&iacute;rium, quetiapina, olanzapina, consentimiento informado, comit&eacute;s de &eacute;tica.</p>  <hr>     <p><font size="3"><b>Abstract</b></font></p>     <p><i>Introduction: </i>Delirium is an acute alteration of consciousness and cognition. Atypical antipsychotics (AA) have recently become a main part of its treatment. Studies in this population generate a series of ethical dilemmas concerning the voluntary participation of patients and their state of vulnerability since their mental faculties are, by definition, compromised. <i>Objective: </i>To assess whether studies with AA for the treatment of delirium obtained an approval by an ethics committee on human research (ECHR), if an informed consent (IC) was obtained, whether the IC was verbal or written, and who gave the approval to participate. <i>Method: </i>Systematic review of Medline for studies of delirium where quetiapine and olanzapine were the main treatment, assessing the existence of an ECHR approval and implementation of an IC. <i>Results: </i>11 studies were identified (6 of quetiapine and 5 of olanzapine). 5 had an ECHR approval. <i>Conclusions: </i>Most studies examining the treatment of delirium with quetiapine or olanzapine were not subject to approval by an ECHR and most of them did not obtain an IC from the patient's legal guardian. It is essential that future studies of antipsychotics and other drugs for the treatment of delirium have the protocol approved by an ECHR and a written IC signed by the patient's legal representative, since by definition delirium is a condition that compromises superior mental processes.</p>     ]]></body>
<body><![CDATA[<p><b>Key words: </b>Delirium, quetiapine, olanzapine, informed consent, ethics committees.</p>  <hr>     <p><font size="3"><b>Introducci&oacute;n</b></font></p>     <p>El del&iacute;rium es una emergencia neurol&oacute;gica que consiste en la alteraci&oacute;n de la conciencia, deterioro cognitivo global, desorientaci&oacute;n, trastornos en la percepci&oacute;n, d&eacute;ficits atencionales, aumento o disminuci&oacute;n de la actividad psicomotriz y variaciones en el ciclo sue&ntilde;o-vigilia (1-4), adem&aacute;s de una afectaci&oacute;n de las funciones ejecutivas (5). Aunque se sol&iacute;a pensar que se trataba de un padecimiento inocuo, incapaz de dejar secuelas, recientemente se ha establecido una asociaci&oacute;n entre el hecho de haber sido hospitalizado (sobre todo cuando esto ocurre en una unidad de cuidados intensivos y, por lo tanto, aumenta la posibilidad de que se presente un cuadro de del&iacute;rium) y el riesgo de sufrir un deterioro cognitivo posterior (6). Ello podr&iacute;a explicar, al menos en parte, el aumento en la mortalidad y el riesgo de institucionalizaci&oacute;n y de demencia en los adultos mayores que han presentado el cuadro (7). Se sabe, adem&aacute;s, que diversas intervenciones son capaces de aumentar su resoluci&oacute;n, disminuir los d&iacute;as de estancia hospitalaria, el n&uacute;mero de d&iacute;as con del&iacute;rium, y hasta los costos de la hospitalizaci&oacute;n (8).</p>     <p>Por otro lado, la profesi&oacute;n m&eacute;dica est&aacute; regida por principios &eacute;ticos que incluyen la b&uacute;squeda permanente del bienestar del paciente y la previsi&oacute;n de los efectos nocivos producto de la toma de decisiones cl&iacute;nicas y de investigaci&oacute;n (9). El prop&oacute;sito de la investigaci&oacute;n en seres humanos es mejorar la existencia de m&eacute;todos diagn&oacute;sticos, terap&eacute;uticos y profil&aacute;cticos de la enfermedad, as&iacute; como ampliar el conocimiento cient&iacute;fico sobre etiolog&iacute;a y fisiopatolog&iacute;a. En la actualidad, la mayor&iacute;a de esas intervenciones implican riesgos para la salud del paciente, por lo que cada investigaci&oacute;n deber&aacute; siempre estar regida por los principios &eacute;ticos en ciencias biom&eacute;dicas (10). Lo anterior implica, entre otras cosas, la aprobaci&oacute;n de cada estudio por parte de un comit&eacute; de &eacute;tica en investigaci&oacute;n en seres humanos (CEISH), as&iacute; como la cuidadosa aplicaci&oacute;n de un consentimiento informado (CI) en aquellos casos en los cuales se realizan intervenciones que implican posibles riesgos para la salud del participante (11).</p>     <p>Debido al reciente aumento en el uso de antipsic&oacute;ticos at&iacute;picos para el tratamiento del del&iacute;rium (12) y a las consideraciones &eacute;ticas propias de la investigaci&oacute;n en seres humanos (13,14), se desean valorar, mediante una b&uacute;squeda sistem&aacute;tica de la literatura, si en los estudios de dos de estos f&aacute;rmacos (quetiapina y olanzapina) se ha aplicado CI y si ha habido aprobaci&oacute;n por parte de un CEISH. Resulta indispensable, debido a diversas caracter&iacute;sticas propias de las poblaciones de pacientes con del&iacute;rium, que la pr&aacute;ctica cl&iacute;nica se sustente en investigaciones que cumplen con las doctrinas establecidas (9-11,13-14).</p>     <p>La revisi&oacute;n sistem&aacute;tica de la literatura y el an&aacute;lisis metodol&oacute;gico de los estudios de estos medicamentos para el tratamiento del del&iacute;rium, siguiendo la propuesta de la medicina basada en la evidencia de Guyatt y cols. (15), ha sido presentada (16,17).</p>     <p><font size="3"><b>B&uacute;squeda de la informaci&oacute;n</b></font></p>     <p>De acuerdo con la propuesta de valoraci&oacute;n de informaci&oacute;n cient&iacute;fica de Guyatt y cols. (15), se formul&oacute; una pregunta de primer orden que limita las caracter&iacute;sticas de los estudios que fueron buscados. As&iacute;, se defini&oacute; una poblaci&oacute;n -pacientes hospitalizados en centros generales (y, por lo tanto, con alguna patolog&iacute;a m&eacute;dico-quir&uacute;rgica de fondo)-, una intervenci&oacute;n -tratamiento del del&iacute;rium con quetiapina u olanzapina sin especificaci&oacute;n de dosis en cualquiera de sus variables motoras- y un desenlace -mejor&iacute;a cl&iacute;nica cuantificada con escalas estandarizadas para su evoluci&oacute;n-. Por lo tanto, se buscaron estudios aleatorios y controlados como el par&aacute;metro ideal, debido a que la pregunta formulada era de terapia o tratamiento.</p>     <p>De esta manera, se realizaron dos b&uacute;squedas avanzadas en Medline: la revisi&oacute;n para estudios de quetiapina ("delirium"&#91;Title/Abstract&#93;) AND ("quetiapine"&#91;Title/Abstract&#93;), sin especificaciones adicionales, detect&oacute; 38 art&iacute;culos sobre el tema. Cuando se utilizaron t&eacute;rminos MeSH, se busc&oacute; por medio de Clinical Queries o se emplearon las especificaciones de humanos, ambos sexos, ingl&eacute;s y espa&ntilde;ol, y personas de diecinueve a&ntilde;os o mayores. No hubo art&iacute;culos adicionales o no se detectaron resultados.</p>     <p>Bas&aacute;ndose en la revisi&oacute;n de cada una de las publicaciones, se procedi&oacute; a agruparlos de la siguiente manera: dos escritos en idiomas distintos al espa&ntilde;ol e ingl&eacute;s (franc&eacute;s y turco) fueron excluidos (18,19), ocho no se enfocaban ni en el del&iacute;rium ni en la quetiapina (20-27), cuatro abordaban alg&uacute;n aspecto de la quetiapina no relacionado con el del&iacute;rium (28-31), diez se refer&iacute;an en general al tratamiento del del&iacute;rium con antipsic&oacute;ticos at&iacute;picos (12,32-40), siete eran reportes de casos de tratamiento de del&iacute;rium con quetiapina (41-47) y solamente seis eran estudios espec&iacute;ficos que abordaban la efectividad de la quetiapina como tratamiento del del&iacute;rium (48-53).</p>     ]]></body>
<body><![CDATA[<p>La segunda revisi&oacute;n fue para estudios de olanzapina ("delirium"&#91;Title/ Abstract&#93;) AND ("olanzapine"&#91;Title/ Abstract&#93;), sin especificaciones adicionales, que detect&oacute; 64 art&iacute;culos sobre el tema. Cuando se utilizaron t&eacute;rminos MeSH, se busc&oacute; por medio de Clinical Queries o se emplearon las especificaciones de humanos, ambos sexos, ingl&eacute;s y espa&ntilde;ol, y personas de diecinueve a&ntilde;os o mayores. No hubo art&iacute;culos adicionales o no se detectaron resultados.</p>     <p>De nuevo, siguiendo la valoraci&oacute;n de los res&uacute;menes de cada una de las publicaciones, se formaron los siguientes conjuntos: seis escritos en idiomas distintos al espa&ntilde;ol e ingl&eacute;s (dos en franc&eacute;s, uno en turco, uno en polaco, uno en italiano y uno en alem&aacute;n), que fueron excluidos del an&aacute;lisis final (18,19,54-57); ocho no se enfocaban ni en el del&iacute;rium ni en la olanzapina (22,24,26,27,58-61); diecisiete abordaban alg&uacute;n aspecto de la olanzapina o antipsic&oacute;ticos, pero sin tener relaci&oacute;n con el del&iacute;rium (23,33,35,62-76); nueve hac&iacute;an referencia general al tratamiento del del&iacute;rium con antipsic&oacute;ticos at&iacute;picos (12,32-34,36,37,40,77,78); en dos casos no fue posible tener acceso al documento completo, aunque no se trataba de estudios sobre la efectividad de la olanzapina en el del&iacute;rium (79,80); dos trataban sobre temas de del&iacute;rium no relacionados</p>     <p>con el tratamiento con olanzapina (38,81); tres eran reportes de caso de tratamiento de del&iacute;rium con olanzapina (82-84); uno se trataba de una carta al editor que comentaba un art&iacute;culo previamente publicado (85); trece art&iacute;culos describen casos de del&iacute;rium inducido por el uso de la olanzapina, tres de los cuales ocurrieron durante intoxicaciones (86-88), nueve con dosis terap&eacute;uticas (89-97) y uno en el contexto de un s&iacute;ndrome neurol&eacute;ptico maligno (98). Finalmente, solo cinco publicaciones eran estudios espec&iacute;ficos que abordaban la efectividad de la olanzapina como tratamiento del del&iacute;rium (99-103).</p>     <p><font size="3"><b>Resultados</b></font></p>     <p>En la <a href="#tab1">tabla 1</a> se presenta el total de los estudios encontrados y sus respectivas caracter&iacute;sticas (tipo de estudio, aprobaci&oacute;n por un CEISH y aplicaci&oacute;n de un CI, as&iacute; como si es verbal o escrito y quien lo autoriza). A continuaci&oacute;n se resumen, siguiendo un orden cronol&oacute;gico de publicaci&oacute;n, los detalles de cada una de esas investigaciones.</p>      <p>    <center><a name="tab1"></a><a href="img/revistas/rcp/v41n1/v41n1a10t1.jpg" target="_blank">Ver tabla 1</a></center></p>      <p>Sipahimalani et al. (99) llevaron a cabo un estudio de car&aacute;cter prospectivo, abierto, no aleatorio, en el que se comparaba la respuesta al tratamiento del del&iacute;rium con dosis flexibles de olanzapina y haloperidol en dos grupos de once pacientes cada uno, internados en un hospital general. Dicha investigaci&oacute;n careci&oacute; de la aprobaci&oacute;n por parte de un CEISH y de la aplicaci&oacute;n de un CI por el apoderado legal, a pesar de que se incluyeron pacientes en estado de vulnerabilidad, debido a una patolog&iacute;a psiqui&aacute;trica mayor (esquizofrenia, trastorno esquizoafectivo, trastorno afectivo bipolar, depresi&oacute;n mayor, dependencia al alcohol y trastorno disocial de la personalidad). No se menciona que dichas entidades estuvieran estables, pero por la existencia del del&iacute;rium es presumible que psicopatol&oacute;gicamente esos pacientes no estaban compensados.</p>     <p>Hubo un solo estudio (48) retrospectivo, de revisi&oacute;n de expedientes, y por lo tanto no requiri&oacute; la aplicaci&oacute;n de un CI; sin embargo, no se menciona que el protocolo de investigaci&oacute;n hubiera sido sometido a la aprobaci&oacute;n por parte de un CEISH de un ente regulador.</p>     <p>Kim et al. (100) realizaron un estudio prospectivo, abierto, no comparado, de olanzapina a dosis flexibles en veinte pacientes provenientes de una unidad de trasplante de m&eacute;dula &oacute;sea, de neurolog&iacute;a y de neurocirug&iacute;a. De nuevo, no existi&oacute; aprobaci&oacute;n por parte de un CEISH, aunque en esta ocasi&oacute;n s&iacute; hubo un CI que fue firmado por el familiar del paciente.</p>     ]]></body>
<body><![CDATA[<p>Por su parte, Breitbart et al. (101) llevaron a cabo un estudio prospectivo, abierto, no comparativo, a dosis flexibles de olanzapina para el manejo del del&iacute;rium en una poblaci&oacute;n de 79 pacientes con c&aacute;ncer. En esta ocasi&oacute;n, se adquiri&oacute; un consentimiento verbal de participaci&oacute;n por parte del paciente y no se present&oacute; la investigaci&oacute;n en un CEISH, pues se adujo que los procedimientos requer&iacute;an "una peque&ntilde;a desviaci&oacute;n de la pr&aacute;ctica cl&iacute;nica est&aacute;ndar".</p>     <p>Sasaki et al. (49) realizaron un estudio prospectivo, abierto, no aleatorio ni controlado, con dosis flexibles de quetiapina para el tratamiento del del&iacute;rium en un grupo de doce pacientes japoneses. No hubo aprobaci&oacute;n por parte de un CEISH, pues de nuevo se aleg&oacute; que "el estudio se realiz&oacute; sin desviaci&oacute;n de la pr&aacute;ctica cl&iacute;nica estandarizada".</p>     <p>En el estudio de Kim et al. (50) se plante&oacute; una investigaci&oacute;n prospectiva, abierta, no aleatoria ni controlada, con dosis flexibles de quetiapina para el tratamiento de del&iacute;rium en doce pacientes masculinos en una unidad m&eacute;dica con distintas patolog&iacute;as. Se obtuvo aprobaci&oacute;n por parte de un CEISH y el CI se obtuvo de forma escrita del paciente.</p>     <p>En el estudio llevado a cabo por Skrobik et al. (102) se realiz&oacute; una evaluaci&oacute;n prospectiva, aleatoria, controlada, que comparaba dosis flexibles de haloperidol y olanzapina para el tratamiento de del&iacute;rium en una poblaci&oacute;n de 73 pacientes predominantemente quir&uacute;rgicos, ingresados en una unidad de cuidados intensivos. El estudio fue aprobado por el CEISH y se obtuvo un CI verbal por parte de los participantes.</p>     <p>Por su parte, Pae et al. (51) plantearon un estudio prospectivo, abierto, no aleatorio ni controlado, con dosis flexibles de quetiapina para el tratamiento del del&iacute;rium en unidades de neurocirug&iacute;a, ortopedia y oncolog&iacute;a. No se mencion&oacute; que el protocolo obtuviera el visto bueno por parte de un CEISH; sin embargo, s&iacute; se obtuvo CI por parte del apoderado legal del paciente.</p>     <p>Lee et al. (52) realizaron un estudio abierto, aleatorio, con dosis flexibles de quetiapina y amisulpride. La investigaci&oacute;n fue aprobada por un CEISH y se obtuvo CI escrito por el representante legal del paciente.</p>     <p>Maneeton et al. (53) llevaron a cabo un estudio prospectivo, abierto, ni aleatorio, ni controlado, con dosis flexible de quetiapina para el tratamiento de del&iacute;rium de diecisiete pacientes con distintas patolog&iacute;as. Nuevamente, este estudio fue aprobado por un CEISH y el representante legal del paciente firm&oacute; un CI.</p>     <p>Finalmente, Kim et al. (103) llevaron a cabo recientemente un estudio aleatorio y comparativo cl&iacute;nico entre risperidona y olanzapina, en el cual participaron 32 pacientes con una media de edad de setenta a&ntilde;os y un predominio de diagn&oacute;stico de c&aacute;ncer. El estudio fue aprobado por el CEISH y se obtuvo un CI por parte de los pacientes o de los familiares.</p>     <p>De esta manera, se presenta el siguiente desglose de un total de once estudios: uno retrospectivo y diez prospectivos; nueve de ellos abiertos y dos aleatorios comparados contra alg&uacute;n otro f&aacute;rmaco. Cinco contaron con la aprobaci&oacute;n del protocolo por parte de un CEISH (tres de quetiapina y dos de olanzapina); mientras que seis de ellos no fueron sometidos a dicha valoraci&oacute;n (tres de quetiapina y tres de olanzapina). As&iacute; mismo, en dos casos no se obtuvo un CI (en uno de ellos, de quetiapina, no era posible porque se trat&oacute; de un estudio retrospectivo de revisi&oacute;n de expedientes); entre tanto, en nueve oportunidades s&iacute; se cont&oacute; con el CI, de los cuales en cuatro ocasiones (tres de quetiapina y uno de olanzapina) el documento fue firmado por el apoderado legal. En dos estudios de olanzapina se obtuvo aprobaci&oacute;n verbal por parte del paciente. En dos ocasiones (uno de quetiapina y uno de olanzapina) consinti&oacute; de forma escrita, ya fuera el paciente o su apoderado legal, y en una oportunidad se obtuvo el consentimiento escrito por parte del paciente (una investigaci&oacute;n de quetiapina).</p>     <p><font size="3"><b>Discusi&oacute;n</b></font></p>     ]]></body>
<body><![CDATA[<p>Tal y como se mencion&oacute; al inicio del presente documento, el del&iacute;rium es un estado de fluctuaci&oacute;n de la conciencia que se acompa&ntilde;a de alteraciones cognitivas que no son parte del &iacute;ndice basal del paciente (1-4). Dicha condici&oacute;n afecta incluso las funciones ejecutivas (5). Por tal motivo, por definici&oacute;n, existe una afectaci&oacute;n de la capacidad de juicio de todo aquel que lo presente y, en consecuencia, esa persona estar&iacute;a en incapacidad legal para comprender e integrar informaci&oacute;n compleja y para asentir una acci&oacute;n muy elaborada y brindar una firma con repercusiones legales (como puede ser el caso de un CI o de un testamento). Lo anterior habla de un importante estado de vulnerabilidad f&iacute;sica y mental.</p>     <p>El principio b&aacute;sico n&uacute;mero 2 de la Declaraci&oacute;n de Helsinki (13) menciona que "el dise&ntilde;o y la ejecuci&oacute;n de cada procedimiento experimental en seres humanos deben formularse claramente en un protocolo experimental que debe enviarse a un comit&eacute; independiente debidamente designado para su consideraci&oacute;n, observaciones y consejos". Lo anterior contrasta con que la mayor&iacute;a de los estudios realizados hasta la fecha para el uso de quetiapina y olanzapina como tratamiento del del&iacute;rium no fueron sometidos a la aprobaci&oacute;n por parte de un CEISH, lo que representa una falta grave a la investigaci&oacute;n en seres humanos.</p>     <p>Esto ocurri&oacute; en seis estudios (48,49,51,99-101), uno de los cuales (99), adem&aacute;s, incluy&oacute; pacientes con patolog&iacute;a psiqui&aacute;trica mayor. En dos ocasiones se dieron justificaciones muy similares para su ausencia: la "peque&ntilde;a desviaci&oacute;n de la pr&aacute;ctica cl&iacute;nica est&aacute;ndar" (101) y el hecho de "que el estudio se realiz&oacute; sin desviaciones de la pr&aacute;ctica cl&iacute;nica estandarizada" (49). Dichos argumentos son completamente incongruentes, debido a la escasa y d&eacute;bil informaci&oacute;n cient&iacute;fica existente a la fecha para el uso de estos f&aacute;rmacos en el tratamiento del del&iacute;rium (16-17); adem&aacute;s, si el estudio tan solo repite una pr&aacute;ctica cl&iacute;nica que tiene un adecuado sustento m&eacute;dico, su realizaci&oacute;n no estar&iacute;a justificada, puesto que no ofrecer&iacute;a beneficio alguno para los pacientes o la ciencia (11,13).</p>     <p>El principio b&aacute;sico n&uacute;mero 9 de la Declaraci&oacute;n de Helsinki (13) menciona que los participantes deben tener "suficiente informaci&oacute;n sobre los objetivos, m&eacute;todos, beneficios previstos y posibles peligros del estudio y las molestias que puede acarrear" y sobre su libre voluntad de participaci&oacute;n y revocaci&oacute;n del estudio. El principio b&aacute;sico n&uacute;mero 10 (13) se refiere a la no coacci&oacute;n hacia el paciente mientras que el n&uacute;mero 11 (13) explica que "en caso de incapacidad legal, el CI debe obtenerse del tutor legal &#91;...&#93; Cuando la incapacidad f&iacute;sica o mental hacen imposible obtener un CI, o cuando el participante es menor de edad, un permiso otorgado por un pariente responsable reemplaza al del participante de conformidad con la legislaci&oacute;n nacional".</p>     <p>Por su parte, el principio 1 del C&oacute;digo de N&uuml;remberg refuerza la esencialidad de la voluntad a la hora de consentir la participaci&oacute;n en el estudio y el requerimiento de capacidad legal para emitir dicho criterio. De esta manera, a pesar de que en nueve investigaciones s&iacute; se obtuvo un CI, tan solo cuatro de ellas (51-53,100) lo hicieron de la forma ideal: mediante un documento escrito firmado por el apoderado legal del paciente, debido a que, como se mencion&oacute;, la capacidad de juicio del usuario se encuentra afectada.</p>     <p>En dos casos, la aprobaci&oacute;n se logr&oacute; mediante el consentimiento verbal del paciente (101,102); en otros dos estudios (49,103), mediante el consentimiento escrito, ya fuera del paciente o del apoderado, y en una ocasi&oacute;n (50), a trav&eacute;s de la firma del paciente. Debido a la incompetencia legal del usuario, su CI no tiene validez y, por lo tanto, se incurre en un importante error metodol&oacute;gico y &eacute;tico que ri&ntilde;e directamente con los principios 9, 10 y 11 de la Declaraci&oacute;n de Helsinki y con el n&uacute;mero 1 del C&oacute;digo de N&uuml;remberg.</p>     <p>En dos ocasiones no se aplic&oacute; un CI, lo cual se faculta en un estudio retrospectivo (48), debido a que esa investigaci&oacute;n acarrea riesgos m&iacute;nimos (&uacute;nicamente de confidencialidad en este caso). Sin embargo, la autoridad para dictar dicho proceder le corresponde &uacute;nicamente al CEISH y, de igual manera, el protocolo de ese estudio debi&oacute; haber sido presentado ante esa instancia. En el caso de otro estudio prospectivo (99), que no aplic&oacute; ni CI ni present&oacute; el protocolo ante un CEISH, existen faltas m&aacute;s graves a estos principios, lo que cuestiona incluso su aprobaci&oacute;n para obtener una publicaci&oacute;n indexada por parte de la revista m&eacute;dica, debido a que el comit&eacute; editorial debe considerar estas variables (104).</p>     <p>Existe, as&iacute; mismo, una contradicci&oacute;n cuando s&iacute; hay CI; pero no aprobaci&oacute;n por parte de un CEISH, tal y como ocurre en cuatro investigaciones (49,51,100,101). Los principios b&aacute;sicos de investigaci&oacute;n cl&iacute;nica de la Declaraci&oacute;n de Helsinki estipulan la valoraci&oacute;n del CI por parte del CEISH, lo cual resulta imposible si no se someti&oacute; el protocolo de investigaci&oacute;n a dicha evaluaci&oacute;n. Por lo tanto, se pone en duda la calidad de dicho documento.</p>     <p><font size="3"><b>Conclusiones</b></font></p>     <p>La mayor&iacute;a de los protocolos de los estudios que analizan el empleo de quetiapina u olanzapina para el tratamiento del del&iacute;rium no fueron sometidos a su aprobaci&oacute;n por parte de un CEISH, lo que resulta esencial en un estudio intervencionista de f&aacute;rmacos sin una robusta evidencia cient&iacute;fica de su efectividad.</p>     ]]></body>
<body><![CDATA[<p>La mayor&iacute;a de los estudios no obtuvieron (de forma exclusiva) el CI de participaci&oacute;n por parte del apoderado legal del paciente con del&iacute;rium, lo que representa una falta grave a los principios &eacute;ticos en investigaci&oacute;n.</p>     <p>Resulta fundamental que los futuros estudios de antipsic&oacute;ticos y otros f&aacute;rmacos para el tratamiento del del&iacute;rium cuenten con la aprobaci&oacute;n del protocolo por parte de un CEISH y de la firma del CI por parte del representante legal del paciente, debido a que, por definici&oacute;n, se trata de una condici&oacute;n que afecta la capacidad de juicio del individuo.</p>  <hr>     <p><font size="3"><b>Referencias</b></font></p>     <!-- ref --><p>1.    Maldonado JR. Delirium in the acute care setting: characteristics, diagnosis and treatment. Crit Care Clin. 2008;24:657-722.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000066&pid=S0034-7450201200010001100001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>2.  Maldonado JR. Pathoetiological model of delirium: a comprehensive understanding of the neurobiology of delirium and an evidence-based approach to prevention and treatment. Crit Care Clin. 2008;24:789-856.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000067&pid=S0034-7450201200010001100002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>3.  American Psychiatric Association (APA). Diagnostic and statistical manual of mental disorders: DSM-IV-TR, 4th ed. Washington: APA Press; 2000.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000068&pid=S0034-7450201200010001100003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>4.  Douglas VC, Josephson SA. Delirium. Continuum Lifelong Learning Neurol. 2010;16:120-34.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000069&pid=S0034-7450201200010001100004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>5.  Trzepacz P. Advanced management of delirium. Documento presentado en: American Psychosomatic Medicine Annual Meeting 2009. 16-20 de noviembre. Hotel R&iacute;o; Las Vegas, Nevada, Estados Unidos.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000070&pid=S0034-7450201200010001100005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>6.  Ehlenbach WJ, Hough CL, Crane PK, et al. Association between acute care and critical illness hospitalization and cognitive function in older adults. JAMA. 2010;303:763-70.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000071&pid=S0034-7450201200010001100006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>7.  Witlox J, Eurelings LSM, de Jonghe JFM, et al. Delirium in elderly patients and the risk of postdischarge mortality, institutionalization, and dementia: a meta-analysis. JAMA. 2010;304:443-51.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000072&pid=S0034-7450201200010001100007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>8.  Maldonado JR, Dhami N. Recognition and management of delirium in the medical and surgical intensive care wards. J Psychosom Res. 2003;55:150.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000073&pid=S0034-7450201200010001100008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>9.  Asociaci&oacute;n M&eacute;dica Mundial (AMM). Declaraci&oacute;n de Ginebra. Ginebra: AMM; 1948.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000074&pid=S0034-7450201200010001100009&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>10. Centro Interdisciplinario de Estudios en Bio&eacute;tica. Universidad de Chile. Pautas &eacute;ticas internacionales &#91;internet&#93;. 2000. &#91;citado: 20 de abril del 2011&#93;. Disponible en: <a href="http://www.bioetica.uchile.cl/pautas/pautas.htm">http://www.bioetica.uchile.cl/pautas/pautas.htm</a>.&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=S0034-7450201200010001100010&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>11. 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