<?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>0121-0807</journal-id>
<journal-title><![CDATA[Revista de la Universidad Industrial de Santander. Salud]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Univ. Ind. Santander. Salud]]></abbrev-journal-title>
<issn>0121-0807</issn>
<publisher>
<publisher-name><![CDATA[Universidad Industrial de Santander]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-08072012000100002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Monitoreo neurofisiológico intraoperatorio en Pediatría: controversias actuales]]></article-title>
<article-title xml:lang="en"><![CDATA[Intraoperative neurophysiological monitoring in pediatrics: Current controversies]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Habeych S.]]></surname>
<given-names><![CDATA[Miguel E.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Industrial de Santander  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2012</year>
</pub-date>
<volume>44</volume>
<numero>1</numero>
<fpage>7</fpage>
<lpage>16</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-08072012000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-08072012000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-08072012000100002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción: el monitoreo neurofisiológico intraoperatorio es una nueva aplicación de la neurofisiología clínica. Mediante la detección inmediata de alteraciones funcionales durante procedimientos médico-quirúrgicos, pretende minimizar la aparición de lesiones neurológicas. Objetivos: se enumeran sus indicaciones en el paciente pediátrico. Se mencionan sus modalidades estándar y se discuten algunas de las más actuales controversias sobre sus principales indicaciones en éstas edades. Conclusiones: para la selección de las controversias nos valimos de las únicas cuatro revisiones existentes en la literatura. Se concluye que a pesar de tan reciente aplicación, representa una herramienta importante en la prevención y/o reducción de posibles lesiones neurológicas, en cerca del 5% de procedimientos médico-quirúrgicos, buena parte de las cuales, se realizan en pacientes pediátricos. Salud UIS 2012; 44 (1): 7-16]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction: intraoperative neurophysiological monitoring is a new application of clinical neurophysiology. Through the immediate detection of functional alterations during medical or surgical procedures, it pretends to minimize the appearance of neurological lesions. Objetive: its indications in pediatric patients are enumerated. Its standard modalities are mentioned, and, current controversies on some of its most important indications are discussed. Conclusions: for the controversies selection we used the only four existent literature reviews. It is concluded, that despite such a recent application, it represents an important tool in the prevention and/or reduction of possible neurological lesions in close to 5% of medical-surgical procedures, many of these of which, are performed in pediatric patients. Salud UIS 2012; 44 (1): 7-16]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Neurofisiología clínica]]></kwd>
<kwd lng="es"><![CDATA[Monitoreo neurofisiológico intraoperatorio]]></kwd>
<kwd lng="es"><![CDATA[Pediatría]]></kwd>
<kwd lng="en"><![CDATA[Clinical neurophysiology]]></kwd>
<kwd lng="en"><![CDATA[Intraoperative neurophysiological monitoring]]></kwd>
<kwd lng="en"><![CDATA[Pediatrics]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font size="2" face="Verdana">     <p align="center"><font size="4"><b>Monitoreo neurofisiol&oacute;gico    <bR> intraoperatorio en Pediatr&iacute;a:    <br> controversias actuales.</b></font></p>      <p align="center">Miguel E. Habeych S.<sup>1</sup></p> 	     <p align="justify">1. M&eacute;dico y Cirujano, Universidad Industrial de Santander. Neur&oacute;logo Cl&iacute;nico, Universidad Nacional de Colombia. M&eacute;ster en Salud P&uacute;blica, Universidad de Pittsburgh. Neurofisi&oacute;logo cl&iacute;nico con competencia en Monitoreo Intraoperatorio, American Board of Clinical Neurophysiology. Profesor Asistente, Departamento de Neurocirug&iacute;a. Director M&eacute;dico, Centro de Neurofisiolog&iacute;a Cl&iacute;nica, Centro M&eacute;dico Universidad de Pittsburgh.    <br> <b>Correspondencia:</b> Miguel E. Habeych, M.D., M.P.H. Direcci&oacute;n: Center for Clinical Neurophysiology, Department of Neurological Surgery, UPMC Presbyterian – Suite B-400 at 200 Lothrop Street Pittsburgh, PA 15213. Telef&oacute;no: (412)-648-9211. Fax: (412)-383-9899. E-mail: <a href="mailto:habeychme@upmc.edu">habeychme@upmc.edu</a>.    <br> <b>Recibido:</b> 28 de marzo de 2012 <b>Aceptado:</b> 15 de abril de 2012</p>  <hr>      <p align="center"><font size="3"><b>RESUMEN</b></font></p> 	     <p align="justify"><b>Introducci&oacute;n:</b> el monitoreo neurofisiol&oacute;gico intraoperatorio es una nueva aplicaci&oacute;n de la neurofisiolog&iacute;a cl&iacute;nica. Mediante la detecci&oacute;n inmediata de alteraciones funcionales durante procedimientos m&eacute;dico-quir&uacute;rgicos, pretende minimizar la aparici&oacute;n de lesiones neurol&oacute;gicas. <b>Objetivos:</b> se enumeran sus indicaciones en el paciente pedi&aacute;trico. Se mencionan sus modalidades est&aacute;ndar y se discuten algunas de las m&aacute;s actuales controversias sobre sus principales indicaciones en &eacute;stas edades. <b>Conclusiones:</b> para la selecci&oacute;n de las controversias nos valimos de las &uacute;nicas cuatro revisiones existentes en la literatura. Se concluye que a pesar de tan reciente aplicaci&oacute;n, representa una herramienta importante en la prevenci&oacute;n y/o reducci&oacute;n de posibles lesiones neurol&oacute;gicas, en cerca del 5% de procedimientos m&eacute;dico-quir&uacute;rgicos, buena parte de las cuales, se realizan en pacientes pedi&aacute;tricos. <b><i>Salud UIS</i> 2012; 44 (1): 7-16</b></p> 	     ]]></body>
<body><![CDATA[<p align="left"><b>Palabras Clave:</b> Neurofisiolog&iacute;a cl&iacute;nica, Monitoreo neurofisiol&oacute;gico intraoperatorio, Pediatr&iacute;a.</p>      <p align="center"><font size="3"><b>Intraoperative neurophysiological monitoring    <br> in pediatrics: Current controversies</b></font></p>      <p align="center"><font size="3"><b>ABSTRACT</b></font></p> 	     <p align="justify"><b>Introduction:</b> intraoperative neurophysiological monitoring is a new application of clinical neurophysiology. Through the immediate detection of functional alterations during medical or surgical procedures, it pretends to minimize the appearance of neurological lesions. <b>Objetive:</b> its indications in pediatric patients are enumerated. Its standard modalities are mentioned, and, current controversies on some of its most important indications are discussed. <b>Conclusions:</b> for the controversies selection we used the only four existent literature reviews. It is concluded, that despite such a recent application, it represents an important tool in the prevention and/or reduction of possible neurological lesions in close to 5% of medical-surgical procedures, many of these of which, are performed in pediatric patients. <b><i>Salud UIS</i> 2012; 44 (1): 7-16</b></p> 	     <p align="left"><b>Keywords:</b> Clinical neurophysiology, Intraoperative neurophysiological monitoring, Pediatrics.</i></p>  <hr>      <p align="center"><font size="3"><b>INTRODUCCION</b></font></p>      <p align="justify">El monitoreo neurofisiol&oacute;gico intraoperatorio (MNFIO) en una aplicaci&oacute;n recientemente desarrollada de la Neurofisiolog&iacute;a cl&iacute;nica, que pretende la prevenci&oacute;n, o en su defecto, la detecci&oacute;n temprana de alteraciones neurol&oacute;gicas funcionales durante la realizaci&oacute;n de procedimientos m&eacute;dico-quir&uacute;rgicos que pongan a riesgo cualquier segmento del sistema nervioso (SN). Su fin &uacute;ltimo es el de permitir una intervenci&oacute;n inmediata para eliminar o minimizar la posible lesi&oacute;n neurol&oacute;gica <sup>1</sup>. La pr&aacute;ctica del MNFIO se sirve de m&uacute;ltiples y diferentes t&eacute;cnicas de evaluaci&oacute;n del SN disponibles actualmente, gracias a la aplicaci&oacute;n de recientes avances tecnol&oacute;gicos como la digitalizaci&oacute;n y compresi&oacute;n de datos, uso de algoritmos de promediaci&oacute;n y transferencia remota de datos, as&iacute; como de la mejor comprensi&oacute;n del papel como generador y conductor el&eacute;ctrico del SN.</p>     <p align="justify">Algunas de &eacute;stas t&eacute;cnicas electrofisiol&oacute;gicas son:<sup>2</sup></p> <ul>       <li><i>Electroencefalograf&iacute;a </i>(EEG): es el registro del potencial el&eacute;ctrico cerebral espont&aacute;neo, generado en la corteza cerebral y recolectado en el cuero cabelludo.</li>    ]]></body>
<body><![CDATA[<br>      <li><i>Electromiograf&iacute;a</i> (EMG) es el registro del potencial el&eacute;ctrico generado por la membrana del m&uacute;sculo durante reposo y su contracci&oacute;n, recolectado a nivel de la fibra muscular.</li>    <br>      <li><i>Potenciales Evocados</i> (PE) son la representaci&oacute;n de los cambios en el potencial el&eacute;ctrico espont&aacute;neo del SN, al paso de corriente el&eacute;ctrica generada por la aplicaci&oacute;n de un est&iacute;mulo adecuado en alg&uacute;n receptor nervioso especializado o en su v&iacute;a. De acuerdo con el tipo de receptor estimulado pueden ser: <i>Auditivos</i> (PEA), <i>Visuales</i> (PEV), y <i>Somato-sensoriales</i> (PESS); y si la estimulada es la v&iacute;a piramidal: <i>Motores</i> (PEM).</li>    <br>      <li><i>Doppler Transcraneal</i> (DTC) t&eacute;cnica que aprovecha la capacidad de reflexi&oacute;n del sonido, para obteniendo su frecuencia de resonancia en dos puntos a lo largo del mismo vaso, derivar la velocidad promedio del flujo sangu&iacute;neo en su interior.</li>    <br>      <li><i>La Oximetr&iacute;a Cerebral</i> (OxiCe-IR) es la medici&oacute;n trans-diploica de la concentraci&oacute;n parcial de oxihemoglobina en la sangre que circula por los capilares cerebrales subyacentes, obtenida mediante el cambio en la absorci&oacute;n de rayos de un espectro cercano al infra-rojo.</li>    <br>      <li><i>Electrocorticograf&iacute;a</i> (ECoG) es el registro del potencial el&eacute;ctrico cerebral espont&aacute;neo, generado y recolectado a nivel de la corteza cerebral (espacio sub-dural).</li>     ]]></body>
<body><![CDATA[</ul>       <p align="center"><font size="3"><b>CONCLUSIONES</b></font></p>      <p align="justify">De acuerdo con una de las primeras publicaciones resaltando su eficacia, la pr&aacute;ctica de MNFIO fue &uacute;til en prevenir cerca de un 5% de los d&eacute;ficits neurol&oacute;gicos post-operatorios en diferentes tipos de procedimientos quir&uacute;rgicos<sup>3</sup>. As&iacute;, la Academia Americana de Neurolog&iacute;a inicialmente destac&oacute; el beneficio de &eacute;ste avance de la pr&aacute;ctica neurofisiol&oacute;gica en el monitoreo de procedimientos tales como endarterectom&iacute;a carot&iacute;dea, cirug&iacute;a de epilepsia, o de tumores que requieran mapeo cortical, cirug&iacute;a de fosa posterior, y cirug&iacute;a para correcci&oacute;n de escoliosis idiop&aacute;tica<sup>4</sup>. Desde entonces, el papel del equipo de MNFIO,<sup>5</sup> as&iacute; como recomendaciones para su pr&aacute;ctica estandarizada,<sup>6</sup> muchos de sus aspectos m&eacute;dico-legales,<sup>7</sup> e incluso su costo<sup>8</sup> han sido estudiados, siendo reconocida recientemente como una de las nuevas sub-especialidades emergentes al interior de la Neurolog&iacute;a cl&iacute;nica <sup>9</sup>.</p>      <p align="justify">Las siguientes revisiones de la aplicaci&oacute;n del MNFIO en Pediatr&iacute;a<sup>10-13</sup> mencionan algunas de sus m&aacute;s frecuentes aplicaciones, como son: (<a href="#t01"><b>Tabla 1</b></a>)</p>      <p align="center"><a name="t01"></a><img src="img/revistas/suis/v44n1/v44n1a02t1.jpg"></p>      <p align="justify"> 1. MNFIO en el tratamiento de escoliosis idiop&aacute;tica: el registro continuo de potenciales evocados somato-sensoriales (PESS) a nivel cortical y subcortical durante el procedimiento, luego de estimular nervios perif&eacute;ricos de los miembros superiores e inferiores, garantiza la indemnidad anat&oacute;mico-funcional de la m&eacute;dula espinal, especialmente durante la fase de distracci&oacute;n (de-rotaci&oacute;n) espinal. El uso de MNFIO durante &eacute;ste tipo de procedimiento demostr&oacute; ser &uacute;til reduciendo la tasa de lesi&oacute;n medular y paraplegia secundaria, de 3.9 a 2% (equivalente a una disminuci&oacute;n cercana al 50%) en un estudio multic&eacute;ntrico ya cl&aacute;sico, que evalu&oacute; cerca de 50.000 reportes de pacientes<sup>14</sup>. Aunque la seguridad en el uso de los potenciales evocados motores trans-craneales (PEMtc) durante la infancia temprana parece ser un tema ya resuelto,<sup>15,16</sup> persiste a&uacute;n debate sobre el uso complementario de PESS y PEMtc (<a href="#f01"><b>Figura 1</b></a>) durante la cirug&iacute;a de escoliosis idiop&aacute;tica.<sup>17,18</sup> Su uso conjunto, al evaluar m&aacute;s fasc&iacute;culos de la m&eacute;dula espinal  se esperar&iacute;a que pudiera eliminar tanto los falsos positivos y negativos de los PEMtc,<sup>19,20</sup> como evitar los casos de s&iacute;ndrome medular anterior sin cambio en los potenciales, que se ven con el monitoreo exclusivo con PESS<sup>21</sup>. Que, bueno es recordarlo aqu&iacute;, ha sido demostrado viajan a lo largo de los cordones medulares posteriores<sup>22</sup>.</p>      <p align="justify">Algunas de las preguntas que sin embargo han encontrado soluci&oacute;n a consecuencia de &eacute;ste debate son: durante la cirug&iacute;a para correcci&oacute;n de deformidad cif&oacute;tica de la columna<sup>23</sup>, as&iacute; como durante la resecci&oacute;n de tumores intramedulares,<sup>24,25</sup> el uso conjunto de PESS y PEMtc es muy &uacute;til y por lo tanto est&aacute; claramente indicado.</p>      <p align="center"><a name="f01"></a><img src="img/revistas/suis/v44n1/v44n1a02f1.jpg"></p>      <p align="justify">2. Tratamiento de m&eacute;dula espinal anclada: en &eacute;ste caso tambi&eacute;n se impone el uso de MNFIO multimodal<sup>26,27</sup>. PESS son utilizados para monitorear la m&eacute;dula espinal durante las laminectom&iacute;as (decompresi&oacute;n), mientras electromiograf&iacute;a espont&aacute;nea (EMGs) para seguimiento de las ra&iacute;ces nerviosas durante las mismas. Posteriormente, el uso de la llamada electromiograf&iacute;a evocada –EMGe- (que algunos denominan tambi&eacute;n potenciales evocados motores –PEM- por cuanto implica la obtenci&oacute;n de un potencial de acci&oacute;n muscular compuesto –PAMC-) debe espec&iacute;ficamente incluir la evaluaci&oacute;n del m&uacute;sculo esf&iacute;nter anal externo<sup>28,29</sup>. Se utiliza al estimular el tejido que ancla la m&eacute;dula antes de cortarlo, el cual usualmente incluye el filum terminale, con el fin de identificar cualquier otra estructura nerviosa adosada como las ra&iacute;ces S1, S2 que inervan el esf&iacute;nter anal externo (<a href="#f02"><b>Figura 2</b></a>), el cual usualmente incluye el filum terminale y se ubica generalmente en la regi&oacute;n sacra, junto a un lipoma<sup>30,31</sup> u otras estructuras nerviosas que pueden o no ser parte de un mielo-meningocele<sup>32,33</sup>.</p>      <p align="center"><a name="f02"></a><img src="img/revistas/suis/v44n1/v44n1a02f2.jpg"></p>      ]]></body>
<body><![CDATA[<p align="justify">En &eacute;ste caso la controversia es si necesariamente el reflejo bulbo-cavernoso debe ser monitoreado concomitantemente junto con el esf&iacute;nter anal externo<sup>34,35</sup>. Nuestra opini&oacute;n es que dado que ambos comparten la misma inervaci&oacute;n, y el monitoreo conjunto es t&eacute;cnicamente dif&iacute;cil sobre todo en pacientes muy peque&ntilde;os, uno de ellos es suficiente. As&iacute;, como el paciente adulto suele generalmente estar m&aacute;s preocupado por la conservaci&oacute;n de la funci&oacute;n er&eacute;ctil, quiz&aacute; es m&aacute;s importante seguir el reflejo bulbocavernoso durante la cirug&iacute;a en &eacute;stos. Mientras que, en el paciente pedi&aacute;trico es m&aacute;s importante la funci&oacute;n esfinteriana, entonces en ellos preferimos monitorear el esfinter anal externo.</p>      <p align="justify">3. Tratamiento de espasticidad mediante rizotom&iacute;a dorsal selectiva:<sup>36,37</sup> el procedimiento se realiza en pacientes en quienes ha fallado toda terapia m&eacute;dica, incluyendo bomba de infusi&oacute;n con Baclof&eacute;n intratecal y busca disminuir las aferencias sensitivas hacia la m&eacute;dula, seccionando segmentos (hasta dos tercios) de las ra&iacute;ces posteriores de los niveles involucrados. El efecto perseguido es que a trav&eacute;s de un reflejo monosin&aacute;ptico medular disminuido, se reduzca secundariamente el tono muscular, por disminuci&oacute;n de las eferencias hacia el huso neuromuscular, con diminuci&oacute;n resultante de la hiperton&iacute;a. Aqu&iacute; los PESS son utilizados para monitorear la m&eacute;dula durante las laminectom&iacute;as y posteriormente, los segmentos de las ra&iacute;ces a ser seccionados son escogidos mediante su evaluaci&oacute;n con EMGe<sup>38</sup>. En &eacute;ste caso la controversia es sobre si el MNFIO realmente sirve y que beneficios representa para el paciente<sup>39</sup>. Aparentemente &eacute;sta controversia ha sido resuelta, luego que un estudio informara mejor&iacute;a a 5 a&ntilde;os en la estabilidad y tono postural de ni&ntilde;os con par&aacute;lisis cerebral, que pudieron llegar a sentarse o caminar, y tambi&eacute;n mejoraron el control de sus esf&iacute;nteres vesical y rectal luego de esta cirug&iacute;a<sup>40</sup>.</p>        <p align="justify">4. Tratamiento de lesiones obst&eacute;tricas del plexo braquial: el papel de la electrofisiolog&iacute;a en el pron&oacute;stico funcional de los pacientes con &eacute;stas lesiones que no mejoran espont&aacute;neamente luego de esperar 3 a 6 meses, es conocido<sup>41</sup>. Sin embargo, el papel del MNFIO<sup>42</sup> no hab&iacute;a podido ser evaluado, en buena parte por la inexistencia de una t&eacute;cnica que pudiera ser considerada el &quot;est&aacute;ndar de oro&quot;. As&iacute;, no fue sino hasta recientemente<sup>43,44</sup> que se estableci&oacute; que no s&oacute;lamente se necesitan PESS, sino tambi&eacute;n potenciales de acci&oacute;n nervioso compuesto – PANC-, y PAMC para poder establecer el grado y nivel de la lesi&oacute;n nerviosa y por tanto decidir si se coloca un injerto de nervio o no<sup>45,46</sup>.</p>      <p align="justify">5. Cirug&iacute;a de epilepsia: en &eacute;ste caso sabemos no s&oacute;lo que el monitoreo Electroencefalogr&aacute;fico,<sup>47,48</sup> sino tambi&eacute;n el registro prequir&uacute;rgico con electrodos subdurales mejoran la localizaci&oacute;n del foco epil&eacute;ptico<sup>49,50</sup>. Se han dise&ntilde;ado adem&aacute;s protocolos espec&iacute;ficos de estimulaci&oacute;n cortical<sup>51-55</sup> con base en l&iacute;mites muy precisos de corriente<sup>56</sup>,con el fin de minimizar al m&aacute;ximo el posible da&ntilde;o a &aacute;reas elocuentes de la corteza y otros riesgos<sup>57</sup>. As&iacute; mismo, existen par&aacute;metros y objetivos muy bien definidos para el tratamiento de epilepsia focal,<sup>58</sup> de l&oacute;bulo termporal,<sup>59</sup> as&iacute; como extra-temporal<sup>60</sup>.</p>      <p align="justify">6. Cirug&iacute;a de tumores intra-craneales: con respecto a &eacute;stos procedimientos, sabemos que el monitoreo de PESS de miembros superiores e inferiores, y a niveles cortical y sub-cortical son importantes<sup>61,62</sup>. Se han dise&ntilde;ado tambi&eacute;n protocolos espec&iacute;ficos para mapeo cortical en presencia de tumores<sup>63-65</sup>. La realizaci&oacute;n de la &quot;reversi&oacute;n de fase&quot; <sup>66,67</sup>, es importante en aquellos tumores que se encuentren cerca de la cisura central. Este procedimiento permite diferenciar las cortezas motora y sensitiva primarias cuando su l&iacute;mite es borrado por edema etc, ayudando a preservar indemne la primera. Se ha descrito tambi&eacute;n, que aquellos tumores que se asocian a convulsiones secundarias intratables, una vez resecados el tumor y foco, las crisis pueden ser mejor controladas<sup>68</sup>. As&iacute; mismo, en los tumores de la fosa posterior, tan comunes en el paciente pedi&aacute;trico, son muy importantes el monitoreo con potenciales evocados auditivos (PEA) del tallo cerebral<sup>69-71</sup>, electromiogr&aacute;fico de los pares craneales<sup>72</sup>, y sobre todo en aquellos de localizaci&oacute;n dorsal, monitoreo de pares craneales<sup>73</sup>, y mapeo del piso del IV ventr&iacute;culo<sup>74</sup>.</p>      <p align="justify">7. Cirug&iacute;a card&iacute;aca y procedimientos endovasculares percut&aacute;neos: MNFIO con EEG, DTC<sup>75</sup> y OxiCer-IR<sup>76</sup> ha sido parte del armamentarium para cirug&iacute;a de alteraciones card&iacute;acas cong&eacute;nitas, por alg&uacute;n tiempo<sup>77</sup>. Sin embargo, con el cambio de paradigma hacia una medicina menos invasiva y minimalista, muchos de &eacute;stos procedimientos antes quir&uacute;rgicos hoy son realizados mediante t&eacute;cnica endovascular percut&aacute;nea, a trav&eacute;s de cat&eacute;teres especialmente dise&ntilde;ados y/o adaptados para posicionar y liberar las diferentes pr&oacute;tesis dirigidas a corregir los defectos, estrictamente bajo MNFIO, dado el riesgo de embolismo cerebral o alteraci&oacute;n del flujo sangu&iacute;neo cerebral regional<sup>78-81</sup>.</p>      <p align="justify">Finalmente, unas cortas palabras sobre el manejo anest&eacute;sico durante cirug&iacute;a pedi&aacute;trica<sup>82</sup>. Como los agentes inhalados deben ser utilizados a dosis mayores en ni&ntilde;os que en adultos dado la inmadurez en aquellos del SN, estos gases deben preferiblemente no ser usados en casos donde PEMtc<sup>83</sup> vayan a ser realizados. Cuando se utilicen, el &oacute;xido nitroso debe restringirse al m&iacute;nimo, pues inhibe los PESS en presencia de otros gases<sup>84</sup>. El uso de la t&eacute;cnica de anestesia total intravenosa (ATIV) para casos de escoliosis idiop&aacute;tica con monitoreo con PESSs y PEMtc, aunque ideal,<sup>85,86</sup> es controvertido. Esto, debido a la preferencia de los anestesi&oacute;logos por no usar infusiones de Propofol en casos prolongados como &eacute;stos, dado el riesgo de &quot;s&iacute;ndrome de infusi&oacute;n por Propofol&quot;, que puede ser mortal<sup>87</sup>. As&iacute;, una alternativa es el uso recientemente descrito de infusiones de dosis bajas de Dexmedetomidine en lugar de Propofol durante ATIV<sup>88</sup>. Siempre que se planee utilizar PEM, &oacute; EMG para el MNFIO, el autor recomienda abstenerse por completo del uso de relajantes musculares, excepto una dosis de alguno de acci&oacute;n corta durante la intubaci&oacute;n, pues la llamada &quot;relajaci&oacute;n parcial&quot;, no s&oacute;lo representa mayores niveles m&iacute;nimos de corriente de estimulaci&oacute;n<sup>89</sup>, sino un mayor n&uacute;mero de falsos negativos. Si se requieren los relajantes musculares, entonces es preferible revertir sus efectos con Sugammadex, que atravieza la barrera hemato-encef&aacute;lica y por tanto logra una reversi&oacute;n total<sup>90</sup> y no parcial como con los agentes hasta ahora utilizados<sup>91</sup>, cuando se vaya a utilizar la EMG.</p>      <p align="center"><font size="3"><b>CONFLICTOS DE INTERES</b></font></p>      <p align="justify">El autor declara no tener ning&uacute;n conflicto de intereses en la publicaci&oacute;n de &eacute;ste art&iacute;culo</p>        <p align="center"><font size="3"><b>REFERENCIAS</b></font></p>      ]]></body>
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