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ya sea una tomograf&#237;a o una resonancia magn&#233;tica&#44; en busca de complicaciones tratables<a class="elsevierStyleCrossRefs" href="#bib0420"><span class="elsevierStyleSup">7&#44;8</span></a>&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Monitorizaci&#243;n respiratoria y necesidad de ventilaci&#243;n mec&#225;nica</span><p id="par0030" class="elsevierStylePara elsevierViewall">La disfunci&#243;n neuronal es una de las causas m&#225;s frecuentes de necesidad de VM<a class="elsevierStyleCrossRef" href="#bib0430"><span class="elsevierStyleSup">9</span></a>&#46; El uso de VM en pacientes responde tanto a la necesidad de mantener la v&#237;a a&#233;rea permeable en pacientes con bajo nivel de consciencia&#44; por el riesgo de aspiraci&#243;n secundario&#44; como para evitar la hipoxemia y la hipercapnia&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Los pacientes neurol&#243;gicos ventilados suelen requerir m&#225;s d&#237;as de ingreso en una UCI&#44; tienen mayor ratio de traqueotom&#237;a y se les suele programar una menor PEEP<a class="elsevierStyleCrossRef" href="#bib0435"><span class="elsevierStyleSup">10</span></a>&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Cl&#225;sicamente se ha tendido a mantener niveles bajos de PEEP &#40;&#8804;<span class="elsevierStyleHsp" style=""></span>5<span class="elsevierStyleHsp" style=""></span>cmH<span class="elsevierStyleInf">2</span>O&#41; para no incrementar la presi&#243;n intracraneal &#40;PIC&#41;&#44; pero estudios recientes sugieren que es seguro utilizar niveles m&#225;s altos de PEEP y que estos mejoran la oxigenaci&#243;n cerebral<a class="elsevierStyleCrossRef" href="#bib0440"><span class="elsevierStyleSup">11</span></a>&#46; Por otro lado&#44; actualmente no est&#225; recomendado mantener periodos largos de hiperventilaci&#243;n profil&#225;ctica para disminuir la pCO<span class="elsevierStyleInf">2</span><a class="elsevierStyleCrossRef" href="#bib0445"><span class="elsevierStyleSup">12</span></a>&#44; pudi&#233;ndose utilizar como medida temporal para disminuir la hipertensi&#243;n intracraneal &#40;HIC&#41; documentada y monitorizada&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Sedoanalgesia</span><p id="par0045" class="elsevierStylePara elsevierViewall">La necesidad de sedaci&#243;n profunda ha demostrado aumentar los d&#237;as de VM&#44; delirio y mortalidad en pacientes ingresados en la UCI<a class="elsevierStyleCrossRefs" href="#bib0450"><span class="elsevierStyleSup">13-15</span></a>&#46; Actualmente las gu&#237;as de sedaci&#243;n en UCI recomiendan&#44; en ausencia de contraindicaci&#243;n&#44; el uso de una estrategia de sedaci&#243;n ligera poniendo &#233;nfasis en priorizar la analgesia y el uso de f&#225;rmacos no benzodiacep&#237;nicos<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">16</span></a>&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">En los pacientes neuroquir&#250;rgicos es importante realizar una exploraci&#243;n neurol&#243;gica &#243;ptima&#44; y en este sentido es necesaria una sedoanalgesia que permita realizar ventanas neurol&#243;gicas de forma frecuente&#44; siendo la sedoanalgesia ligera segura en este subgrupo de pacientes<a class="elsevierStyleCrossRefs" href="#bib0470"><span class="elsevierStyleSup">17&#44;18</span></a>&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Fluidoterapia y alteraciones electrol&#237;ticas</span><p id="par0055" class="elsevierStylePara elsevierViewall">La fluidoterapia se suele dividir entre cristaloides y coloides&#46; Los cristaloides tienen mol&#233;culas peque&#241;as solubles y se subdividen en dos subgrupos&#58; las soluciones salinas y las soluciones balanceadas&#44; estas &#250;ltimas para conseguir una osmolaridad isot&#243;nica&#59; tienen diferentes iones seg&#250;n el tipo&#44; pero todos ellos tienen menos cloro&#58; el exceso de cloro ex&#243;geno se ha visto relacionado con un aumento de acidosis metab&#243;lica hiperclor&#233;mica&#44; disfunci&#243;n renal&#44; disfunci&#243;n gastrointestinal y secreci&#243;n de citoquinas inflamatorias<a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">19</span></a>&#46; El lactato de Ringer tiene menos osmolaridad que el resto de cristaloides&#44; por lo que grandes infusiones con este cristaloide puede aumentar el edema cerebral y la PIC<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">20</span></a>&#46; Para la resucitaci&#243;n y mantenimiento del paciente neuroquir&#250;rgico se deber&#237;an usar soluciones isot&#243;nicas&#44; evitando siempre las hipot&#243;nicas<a class="elsevierStyleCrossRefs" href="#bib0490"><span class="elsevierStyleSup">21&#44;22</span></a>&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Los coloides poseen mol&#233;culas m&#225;s grandes con menos capacidad para difundir por membranas semipermeables&#46; Actualmente se tiende a utilizar cristaloides por encima de los coloides debido a que no se han visto diferencias significativas en la mortalidad en coloides respecto al uso de cristaloides<a class="elsevierStyleCrossRef" href="#bib0500"><span class="elsevierStyleSup">23</span></a>&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">Las soluciones hipert&#243;nicas se usan para el tratamiento de la HIC&#44; buscando disminuir el edema cerebral extrayendo agua del tejido nervioso mediante presi&#243;n osm&#243;tica al intersticio&#46; No hay diferencias entre soluciones s&#243;dicas hipert&#243;nicas y el manitol en el manejo de la HIC<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">24</span></a>&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">La hiponatremia es la alteraci&#243;n electrol&#237;tica m&#225;s frecuente en los pacientes neuroquir&#250;rgicos&#46; Las patolog&#237;as m&#225;s frecuentes que causan hiponatremia son la secreci&#243;n inadecuada de hormona antidiur&#233;tica y el s&#237;ndrome denominado cerebro perdedor de sal &#40;CPS&#41;&#46; Ambas cursan con hiponatremia y natriuresis aumentada&#44; siendo la principal diferencia el volumen extracelular &#40;VEC&#41;&#44; ya que el s&#237;ndrome de secreci&#243;n inadecuada de ADH &#40;SIADH&#41; cursa con VEC normal y el CPS con VEC disminuido&#44; es decir&#44; el principal factor diferenciante es la volemia&#46; Ante la aparici&#243;n de s&#237;ntomas con hiponatremia severa se recomienda la infusi&#243;n de suero salino hipert&#243;nico al 3&#37;<a class="elsevierStyleCrossRefs" href="#bib0480"><span class="elsevierStyleSup">19&#44;25&#44;26</span></a>&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">Tambi&#233;n podemos encontrar alteraciones del sodio en forma de hipernatremia&#46; La diabetes ins&#237;pida se caracteriza por deshidrataci&#243;n con hipernatremia a ra&#237;z de la disminuci&#243;n de la hormona antidiur&#233;tica&#46; El tratamiento se basa en reposici&#243;n h&#237;drica y con an&#225;logos de la ADH como la desmopresina o la vasopresina<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">20</span></a>&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Profilaxis posquir&#250;rgica</span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Antibi&#243;tica</span><p id="par0080" class="elsevierStylePara elsevierViewall">La prevalencia de infecci&#243;n de herida quir&#250;rgica oscila entre el 1 y el 11&#37;<a class="elsevierStyleCrossRef" href="#bib0520"><span class="elsevierStyleSup">27</span></a>&#46; Debido al riesgo que comporta una infecci&#243;n neuroquir&#250;rgica&#44; la profilaxis antibi&#243;tica en intervenciones neuroquir&#250;rgicas est&#225; ampliamente aceptada<a class="elsevierStyleCrossRefs" href="#bib0525"><span class="elsevierStyleSup">28&#44;29</span></a>&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">La elecci&#243;n del antibi&#243;tico buscar&#225; cubrir los g&#233;rmenes m&#225;s frecuentemente aislados&#58; <span class="elsevierStyleItalic">Staphylococcus aureus</span> y estafilococo plasmocoagulasa negativo&#46; Son opciones para esta profilaxis el cotrimoxazol o la cefazolina&#46; En las cirug&#237;as de base de cr&#225;neo con abordaje transnasal o&#47;y transoral se recomienda la profilaxis antibi&#243;tica con amoxicilina-&#225;cido clavul&#225;nico&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">En los pacientes con TCE est&#225; indicada la profilaxis antibi&#243;tica en fracturas craneales abiertas&#46; Se han postulado diferentes pautas&#58; amoxicilina-&#225;cido clavul&#225;nico o cefuroxima con metronidazol<a class="elsevierStyleCrossRefs" href="#bib0535"><span class="elsevierStyleSup">30-32</span></a>&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">En fracturas no abiertas de base de cr&#225;neo el uso de antibi&#243;ticos parece no modificar la incidencia de infecciones del SNC&#46; En caso de tener asociada f&#237;stula de LCR hay menor evidencia de si el uso de antibi&#243;ticos tiene o no utilidad<a class="elsevierStyleCrossRefs" href="#bib0550"><span class="elsevierStyleSup">33-35</span></a>&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">En los sensores de neuromonitorizaci&#243;n invasivos&#44; como el sensor de PIC&#44; el de presi&#243;n tisular de ox&#237;geno &#40;PtiO<span class="elsevierStyleInf">2</span>&#41; y el de microdi&#225;lisis&#44; no hay evidencia que apoye el uso de antibi&#243;ticos durante el tiempo de inserci&#243;n de estos dispositivos<a class="elsevierStyleCrossRefs" href="#bib0565"><span class="elsevierStyleSup">36-38</span></a>&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">En la colocaci&#243;n de un drenaje ventricular externo no est&#225; recomendado el tratamiento intravenoso durante el tiempo de inserci&#243;n del drenaje por el riesgo de aumentar resistencias antibi&#243;ticas&#44; pero se recomienda una dosis previa a la inserci&#243;n<a class="elsevierStyleCrossRef" href="#bib0580"><span class="elsevierStyleSup">39</span></a>&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">En cirug&#237;a raquimedular la profilaxis quir&#250;rgica antibi&#243;tica est&#225; indicada&#59; debe valorarse el antibi&#243;tico en funci&#243;n de cada paciente&#44; de las comorbilidades y de los factores de riesgo&#44; aunque nuevamente la cefazolina suele ser el antibi&#243;tico de elecci&#243;n<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">40</span></a>&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Prevenci&#243;n de convulsiones</span><p id="par0115" class="elsevierStylePara elsevierViewall">El uso de f&#225;rmacos anticonvulsivantes profil&#225;cticos en procedimientos neuroquir&#250;rgicos es controvertido en todas las patolog&#237;as neuroquir&#250;rgicas y existe poca evidencia al respecto&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">Aunque hasta un 60&#37; de los pacientes con tumor cerebral pueden presentar convulsiones en su evoluci&#243;n<a class="elsevierStyleCrossRef" href="#bib0590"><span class="elsevierStyleSup">41</span></a>&#44; el uso de anticonvulsivantes no ha demostrado disminuir la aparici&#243;n de crisis epil&#233;pticas en estos pacientes<a class="elsevierStyleCrossRef" href="#bib0595"><span class="elsevierStyleSup">42</span></a> y no est&#225; recomendado su uso rutinario<a class="elsevierStyleCrossRefs" href="#bib0490"><span class="elsevierStyleSup">21&#44;43</span></a>&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">En los pacientes con traumatismo craneal grave se recomienda el uso de fenito&#237;na para disminuir la incidencia de crisis epil&#233;pticas postraum&#225;ticas tempranas&#46; Aunque se ha propuesto el uso de levetiracetam&#44; no hay suficiente evidencia actual para recomendarlo sobre la fenito&#237;na en este subgrupo de pacientes<a class="elsevierStyleCrossRef" href="#bib0445"><span class="elsevierStyleSup">12</span></a>&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Pese a la alta incidencia de crisis epil&#233;pticas en los pacientes afectos de HSA &#40;entre el 4 y el 26&#37; en el momento de la hemorragia&#41;<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">44</span></a>&#44; no se recomienda el uso sistem&#225;tico de anticonvulsivantes en la HSA&#46; Recientes revisiones sistem&#225;ticas concluyen que no existen pruebas para apoyar o refutar el uso de f&#225;rmacos antiepil&#233;pticos para la prevenci&#243;n primaria o secundaria de las convulsiones relacionadas con la HSA<a class="elsevierStyleCrossRefs" href="#bib0610"><span class="elsevierStyleSup">45&#44;46</span></a>&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">Dada la disparidad de patolog&#237;a basal que condiciona la craneotom&#237;a&#44; hay poca evidencia para poder recomendar o no el uso de f&#225;rmacos anticonvulsivantes en craniotom&#237;as<a class="elsevierStyleCrossRef" href="#bib0620"><span class="elsevierStyleSup">47</span></a>&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">En el accidente vascular las gu&#237;as no recomiendan el uso profil&#225;ctico de antiepil&#233;pticos&#44; pero s&#237; su tratamiento en caso de aparici&#243;n de convulsiones&#46; Una revisi&#243;n de la Cochrane<a class="elsevierStyleCrossRef" href="#bib0625"><span class="elsevierStyleSup">48</span></a> concluye no haber efectos beneficiosos al comparar el &#225;cido valproico con placebo para la prevenci&#243;n primaria de las convulsiones despu&#233;s de la hemorragia cerebral<a class="elsevierStyleCrossRef" href="#bib0630"><span class="elsevierStyleSup">49</span></a>&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Profilaxis antitromb&#243;tica</span><p id="par0145" class="elsevierStylePara elsevierViewall">La tromboprofilaxis debe individualizarse a cada enfermo teniendo en cuenta los factores de riesgo de tromboembolismo<a class="elsevierStyleCrossRefs" href="#bib0635"><span class="elsevierStyleSup">50&#44;51</span></a>&#44; como las patolog&#237;as subyacentes&#46; Estudios recientes sugieren que el uso de profilaxis farmacol&#243;gica no aumenta significativamente el sangrado craneal<a class="elsevierStyleCrossRef" href="#bib0645"><span class="elsevierStyleSup">52</span></a>&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">Podemos diferenciar entre la tromboprofilaxis mec&#225;nica&#44; con medias de compresi&#243;n neum&#225;tica intermitente&#44; y la tromboprofilaxis farmacol&#243;gica&#44; con la heparina de bajo peso molecular subcut&#225;nea o heparina no fraccionada subcut&#225;nea<a class="elsevierStyleCrossRef" href="#bib0635"><span class="elsevierStyleSup">50</span></a>&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">Si nos centramos en las patolog&#237;as neuroquir&#250;rgicas&#44; las gu&#237;as recomiendan el uso precoz de tromboprofilaxis mec&#225;nica y el paso a farmacol&#243;gica cuando sea posible&#44; asoci&#225;ndose ambas en caso de alto riesgo&#44; como ictus isqu&#233;mico y lesi&#243;n raquimedular&#46; En las hemorragias intracraneales no traum&#225;ticas se recomienda retrasar el uso de la tromboprofilaxis farmacol&#243;gica hasta 48<span class="elsevierStyleHsp" style=""></span>h del ingreso&#44; tras normalizar la coagulaci&#243;n y si el hematoma permanece estable&#46; En el TCE con hemorragia la recomendaci&#243;n es tromboprofilaxis mec&#225;nica hasta 24-48<span class="elsevierStyleHsp" style=""></span>h&#44; donde se valorar&#237;a el paso a farmacol&#243;gica&#46; En los pacientes con HSA tambi&#233;n se recomienda iniciar profilaxis mec&#225;nica al ingreso en el hospital y el uso de profilaxis farmacol&#243;gica tras haber asegurado el aneurisma&#46; En los pacientes con craneotom&#237;as electivas se recomienda iniciar profilaxis farmacol&#243;gica en las primeras 24<span class="elsevierStyleHsp" style=""></span>h posteriores<a class="elsevierStyleCrossRefs" href="#bib0635"><span class="elsevierStyleSup">50&#44;53</span></a>&#46;</p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Neuromonitorizaci&#243;n</span><p id="par0160" class="elsevierStylePara elsevierViewall">Cuando la exploraci&#243;n neurol&#243;gica no es posible o esta no nos da suficiente informaci&#243;n se valorar&#225; la neuromonitorizaci&#243;n avanzada&#46; El algoritmo de neuromonitorizaci&#243;n se describe en la <a class="elsevierStyleCrossRef" href="#fig0005">figura 1</a>&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Presi&#243;n intracraneal</span><p id="par0165" class="elsevierStylePara elsevierViewall">La monitorizaci&#243;n de la PIC resulta fundamental en los cuidados de los pacientes con lesi&#243;n cerebral difusa&#44; habi&#233;ndose asociado incrementos de la PIC con un aumento de la mortalidad<a class="elsevierStyleCrossRefs" href="#bib0655"><span class="elsevierStyleSup">54-56</span></a>&#46; Los valores normales de PIC est&#225;n entre 5 y 15<span class="elsevierStyleHsp" style=""></span>mmHg<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46; Generalmente unas cifras &#62;<span class="elsevierStyleHsp" style=""></span>20-25<span class="elsevierStyleHsp" style=""></span>mmHg se consideran indicaci&#243;n de tratamiento para el control de esta&#46; Las recomendaciones de control de la HIC se recogen en la <a class="elsevierStyleCrossRef" href="#fig0010">figura 2</a>&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0170" class="elsevierStylePara elsevierViewall">Se recomienda la medici&#243;n de la PIC en pacientes con TCE con GCS inicial igual o inferior a 8 con TC anormal y en aquellos con TC normal pero &#62;<span class="elsevierStyleHsp" style=""></span>40<span class="elsevierStyleHsp" style=""></span>a&#241;os&#44; hipotensi&#243;n arterial &#40;sist&#243;lica &#60;<span class="elsevierStyleHsp" style=""></span>90<span class="elsevierStyleHsp" style=""></span>mmHg&#41; o respuesta motora anormal al dolor<a class="elsevierStyleCrossRef" href="#bib0675"><span class="elsevierStyleSup">58</span></a>&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">La monitorizaci&#243;n de la PIC tambi&#233;n est&#225; recomendada en pacientes en coma con contusiones&#44; o con imposibilidad de exploraci&#243;n cl&#237;nica&#44; o en los que la suspensi&#243;n de la sedaci&#243;n es peligrosa&#44; y despu&#233;s de la craneotom&#237;a secundaria&#46; Adem&#225;s debe ser considerada en los pacientes con hematoma agudo supratentorial con riesgo de HIC<a class="elsevierStyleCrossRefs" href="#bib0670"><span class="elsevierStyleSup">57&#44;59</span></a>&#46;</p><p id="par0180" class="elsevierStylePara elsevierViewall">Con la PIC podemos obtener la PPC&#44; definida como presi&#243;n arterial media<span class="elsevierStyleHsp" style=""></span>&#8722;<span class="elsevierStyleHsp" style=""></span>PIC<a class="elsevierStyleCrossRef" href="#bib0685"><span class="elsevierStyleSup">60</span></a>&#46; El valor objetivo es mantener una PPC &#62;<span class="elsevierStyleHsp" style=""></span>60<span class="elsevierStyleHsp" style=""></span>mmHg&#59; niveles menores se han asociado a peor resultado final<a class="elsevierStyleCrossRef" href="#bib0690"><span class="elsevierStyleSup">61</span></a>&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">Tambi&#233;n la monitorizaci&#243;n de la PIC nos permite objetivar la autorregulaci&#243;n cerebral&#44; es decir&#44; la capacidad que tiene el cerebro de realizar vasoconstricci&#243;n con aumento de la presi&#243;n arterial&#46; El &#237;ndice de velocidad media basado en la PPC y el &#237;ndice de autorregulaci&#243;n &#40;ARI&#41; predicen la mortalidad&#44; y el resultado neurol&#243;gico final en el TCE y el ARI&#44; el resultado neurol&#243;gico en la HSA<a class="elsevierStyleCrossRef" href="#bib0695"><span class="elsevierStyleSup">62</span></a>&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Flujo cerebral</span><p id="par0190" class="elsevierStylePara elsevierViewall">Podemos determinar el flujo cerebral mediante medidas invasivas como la flujometr&#237;a de difusi&#243;n t&#233;rmica&#46; El principal inconveniente de esta t&#233;cnica es que es un sistema de medici&#243;n regional que ofrece una informaci&#243;n limitada a un &#225;rea del par&#233;nquima<a class="elsevierStyleCrossRef" href="#bib0700"><span class="elsevierStyleSup">63</span></a>&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">M&#225;s com&#250;n es el uso de ultrasonograf&#237;a con color y doppler transcraneal para la estimaci&#243;n del flujo de regiones cerebrales m&#225;s amplias&#44; que ha demostrado su utilidad sobre todo en la HSA para la monitorizaci&#243;n semicontinua del d&#233;ficit isqu&#233;mico tard&#237;o y vasoespasmo<a class="elsevierStyleCrossRefs" href="#bib0610"><span class="elsevierStyleSup">45&#44;64</span></a>&#46; Pese a esto&#44; no todos los pacientes tienen una buena ventana ac&#250;stica y la exactitud de la medida depende de la habilidad del operador<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46;</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Oxigenaci&#243;n cerebral</span><p id="par0200" class="elsevierStylePara elsevierViewall">Otro de los pilares de la perfusi&#243;n cerebral es la correcta oxigenaci&#243;n cerebral&#44; y para esto nos podemos valer de la pulsioximetr&#237;a para conocer la oxigenaci&#243;n sist&#233;mica&#44; adem&#225;s del etCO<span class="elsevierStyleInf">2</span> para evitar la hiperventilaci&#243;n y la vasoconstricci&#243;n cerebral secundaria<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46;</p><p id="par0205" class="elsevierStylePara elsevierViewall">El sensor de PtiO<span class="elsevierStyleInf">2</span> nos ofrece una saturaci&#243;n local y continua del par&#233;nquima&#44; con unos valores normales establecidos entre 20-35<span class="elsevierStyleHsp" style=""></span>mmHg<a class="elsevierStyleCrossRef" href="#bib0710"><span class="elsevierStyleSup">65</span></a>&#46; Existe una relaci&#243;n entre valores bajos de PtiO<span class="elsevierStyleInf">2</span> y morbimortalidad&#44; siendo indicaci&#243;n de tratamiento valores inferiores a 20<span class="elsevierStyleHsp" style=""></span>mmHg<a class="elsevierStyleCrossRef" href="#bib0715"><span class="elsevierStyleSup">66</span></a>&#46; Un valor inferior a 20<span class="elsevierStyleHsp" style=""></span>mmHg puede significar un compromiso en la oxigenaci&#243;n y debe considerarse un tratamiento para optimizar el aporte de ox&#237;geno<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46;</p><p id="par0210" class="elsevierStylePara elsevierViewall">La SjvO<span class="elsevierStyleInf">2</span> nos ofrece informaci&#243;n global sobre el uso de ox&#237;geno cerebral&#46; Se mide mediante un cat&#233;ter colocado en la vena yugular interna dominante con el extremo en el bulbo yugular<a class="elsevierStyleCrossRef" href="#bib0720"><span class="elsevierStyleSup">67</span></a>&#46; Se consideran valores normales entre el 55 y el 75&#37;&#46; Valores inferiores al 55&#37; son indicativos de riesgo de isquemia y por encima del 75&#37; pueden significar hiperemia&#44; disminuci&#243;n del metabolismo o muerte celular<a class="elsevierStyleCrossRefs" href="#bib0725"><span class="elsevierStyleSup">68-70</span></a>&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">La implementaci&#243;n de los sensores de PtiO<span class="elsevierStyleInf">2</span> y SjvO<span class="elsevierStyleInf">2</span> est&#225; recomendada en pacientes con riesgo de isquemia<a class="elsevierStyleCrossRefs" href="#bib0445"><span class="elsevierStyleSup">12&#44;57&#44;71</span></a>&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">Mediante el uso de la <span class="elsevierStyleItalic">near infrared spectroscopy</span> &#40;NIRS&#41; cerebral se puede estimar la saturaci&#243;n de ox&#237;geno del tejido cerebral<a class="elsevierStyleCrossRef" href="#bib0745"><span class="elsevierStyleSup">72</span></a>&#46; Su uso no est&#225; recomendado en las gu&#237;as de neuromonitorizaci&#243;n debido a la evidencia limitada y a las limitaciones de la t&#233;cnica en adultos<a class="elsevierStyleCrossRefs" href="#bib0670"><span class="elsevierStyleSup">57&#44;73</span></a>&#46;</p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Metabolismo cerebral</span><p id="par0225" class="elsevierStylePara elsevierViewall">Una mala perfusi&#243;n tisular del par&#233;nquima cerebral alterar&#225; la homeostasis extracelular&#44; la cual se puede medir mediante un cat&#233;ter de microdi&#225;lisis<a class="elsevierStyleCrossRef" href="#bib0755"><span class="elsevierStyleSup">74</span></a>&#46; Normalmente se suele medir lactato&#44; piruvato&#44; glucosa&#44; glutamato y glicerol&#44; que permiten determinar la existencia de una crisis metab&#243;lica<a class="elsevierStyleCrossRef" href="#bib0755"><span class="elsevierStyleSup">74</span></a>&#46;</p><p id="par0230" class="elsevierStylePara elsevierViewall">La glucosa es la principal fuente de energ&#237;a del cerebro&#46; Una disminuci&#243;n mantenida a nivel cerebral &#40;&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;8<span class="elsevierStyleHsp" style=""></span>mM&#41; se ha asociado a peores resultados posterior a un TCE grave y HSA<a class="elsevierStyleCrossRef" href="#bib0755"><span class="elsevierStyleSup">74</span></a>&#46;</p><p id="par0235" class="elsevierStylePara elsevierViewall">La glucosa en condiciones normales se metaboliza a piruvato produciendo ATP en el ciclo de Krebs&#59; en cambio&#44; en situaci&#243;n de hipoxia o disfunci&#243;n mitocondrial el piruvato es metabolizado a lactato&#46; Un aumento de la ratio lactato&#47;piruvato &#40;LP&#41; en el espacio extracelular traduce una situaci&#243;n de hipoxia o de disfunci&#243;n neuronal&#46; Un aumento de LP con disminuci&#243;n de piruvato es sugestivo de isquemia cl&#225;sica&#59; en cambio&#44; un aumento de LP con piruvato normal sugiere una causa no isqu&#233;mica&#44; como disfunci&#243;n mitocondrial<a class="elsevierStyleCrossRef" href="#bib0760"><span class="elsevierStyleSup">75</span></a>&#46;</p><p id="par0240" class="elsevierStylePara elsevierViewall">El glutamato se ha relacionado con el da&#241;o celular y la respuesta inflamatoria&#46; Una elevaci&#243;n del glutamato puede traducir hipoxia y&#47;o isquemia&#46; El glicerol es un componente lip&#237;dico de las neuronas y un marcador de da&#241;o celular neuronal&#44; por lo que una elevaci&#243;n del glicerol es un marcador de hipoxia y&#47;o isquemia y de destrucci&#243;n de la membrana neuronal<a class="elsevierStyleCrossRef" href="#bib0760"><span class="elsevierStyleSup">75</span></a>&#46;</p><p id="par0245" class="elsevierStylePara elsevierViewall">El uso de microdi&#225;lisis est&#225; recomendado en los pacientes con riesgo de isquemia cerebral&#44; hipoxia y situaciones de d&#233;ficit de glucosa<a class="elsevierStyleCrossRefs" href="#bib0705"><span class="elsevierStyleSup">64&#44;76</span></a>&#46;</p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Actividad el&#233;ctrica cerebral</span><p id="par0250" class="elsevierStylePara elsevierViewall">El electroencefalograma &#40;EEG&#41; registra la actividad el&#233;ctrica y es fundamental para detectar crisis epil&#233;pticas&#44; sobre todo crisis no convulsivas&#46; El EEG continuo &#40;cEEG&#41; tiene m&#225;s posibilidades de detectar crisis no convulsivas que el EEG convencional<a class="elsevierStyleCrossRef" href="#bib0770"><span class="elsevierStyleSup">77</span></a>&#44; pero la dificultad t&#233;cnica y de interpretaci&#243;n&#44; as&#237; como la disponibilidad de la misma&#44; limitan la generalizaci&#243;n de la t&#233;cnica&#46;</p><p id="par0255" class="elsevierStylePara elsevierViewall">El cEEG est&#225; indicado en los pacientes con alteraci&#243;n del nivel de conciencia persistente o inexplicada<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46; El EEG es &#250;til en el diagn&#243;stico del estatus epil&#233;ptico no convulsivo&#44; pero tambi&#233;n para evaluar la respuesta al tratamiento&#46; As&#237; mismo&#44; en pacientes con HSA de alto grado el cEEG puede poner en evidencia un d&#233;ficit neuronal isqu&#233;mico tard&#237;o de nueva aparici&#243;n&#46;</p></span></span></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conclusiones</span><p id="par0260" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">&#8211;</span><p id="par0265" class="elsevierStylePara elsevierViewall">El paciente neuroquir&#250;rgico requiere un manejo postoperatorio integral&#44; incluyendo una monitorizaci&#243;n din&#225;mica en funci&#243;n de su situaci&#243;n cl&#237;nica&#46;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">&#8211;</span><p id="par0270" class="elsevierStylePara elsevierViewall">En pacientes conscientes se realizar&#225; una exploraci&#243;n neurol&#243;gica completa y frecuente para detectar la aparici&#243;n de d&#233;ficits no presentes a su ingreso en la UCI&#46;</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">&#8211;</span><p id="par0275" class="elsevierStylePara elsevierViewall">Los pacientes neurol&#243;gicos precisan una estrategia ventilatoria y de analgosedaci&#243;n que favorezca la oxigenaci&#243;n cerebral y permita ventanas peri&#243;dicas de sedaci&#243;n&#46;</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">&#8211;</span><p id="par0280" class="elsevierStylePara elsevierViewall">En pacientes sedados donde la exploraci&#243;n cl&#237;nica completa no es posible se considerar&#225; la monitorizaci&#243;n multimodal&#44; incluyendo los dispositivos de medici&#243;n de PIC&#44; PtiO<span class="elsevierStyleInf">2</span>&#44; EEG&#8230; que nos ayuden a optimizar el manejo y a detectar la aparici&#243;n de complicaciones&#46;</p></li></ul></p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Conflicto de intereses</span><p id="par0285" class="elsevierStylePara elsevierViewall">Los autores refieren no tener conflicto de intereses&#46;</p></span></span>"
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          "titulo" => "Cuidados postoperatorios"
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            0 => array:2 [
              "identificador" => "sec0015"
              "titulo" => "Monitorizaci&#243;n cl&#237;nica y radiol&#243;gica"
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            1 => array:2 [
              "identificador" => "sec0020"
              "titulo" => "Monitorizaci&#243;n respiratoria y necesidad de ventilaci&#243;n mec&#225;nica"
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            2 => array:2 [
              "identificador" => "sec0025"
              "titulo" => "Sedoanalgesia"
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            3 => array:2 [
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              "titulo" => "Fluidoterapia y alteraciones electrol&#237;ticas"
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              "titulo" => "Profilaxis posquir&#250;rgica"
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                  "titulo" => "Antibi&#243;tica"
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                  "titulo" => "Prevenci&#243;n de convulsiones"
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                  "titulo" => "Profilaxis antitromb&#243;tica"
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              "titulo" => "Neuromonitorizaci&#243;n"
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                  "titulo" => "Presi&#243;n intracraneal"
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                  "identificador" => "sec0065"
                  "titulo" => "Flujo cerebral"
                ]
                2 => array:2 [
                  "identificador" => "sec0070"
                  "titulo" => "Oxigenaci&#243;n cerebral"
                ]
                3 => array:2 [
                  "identificador" => "sec0075"
                  "titulo" => "Metabolismo cerebral"
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                4 => array:2 [
                  "identificador" => "sec0080"
                  "titulo" => "Actividad el&#233;ctrica cerebral"
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          "titulo" => "Conclusiones"
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          "titulo" => "Conflicto de intereses"
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          "titulo" => "Bibliograf&#237;a"
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    "fechaRecibido" => "2018-10-30"
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            0 => "Neuroquir&#250;rgico"
            1 => "Manejo"
            2 => "Complicaciones postoperatorias"
            3 => "Neuromonitorizaci&#243;n"
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          "clase" => "keyword"
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            0 => "Neurosurgery"
            1 => "Management"
            2 => "Postoperative complications"
            3 => "Multimodal monitoring"
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    "resumen" => array:2 [
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        "titulo" => "Resumen"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Los pacientes con patolog&#237;a neuroquir&#250;rgica requieren frecuentemente el ingreso en unidades de cuidados intensivos tanto para su manejo en el postoperatorio inmediato como para el control de las complicaciones que puedan presentar&#46; La patolog&#237;a neuroquir&#250;rgica es amplia y requiere profilaxis&#44; tratamiento y monitorizaci&#243;n espec&#237;fica&#46; El tratamiento del paciente neuroquir&#250;rgico se basa en asegurar una correcta perfusi&#243;n tisular cerebral&#44; es decir&#44; mantener un flujo sangu&#237;neo suficiente para aportar energ&#237;a al par&#233;nquima cerebral&#46; Con el objetivo de optimizar el tratamiento y el manejo de estos pacientes&#44; en los &#250;ltimos a&#241;os se han desarrollado y perfeccionado diferentes sistemas para monitorizar variables como la presi&#243;n intracraneal&#44; la actividad el&#233;ctrica cerebral &#40;electroencefalograf&#237;a&#41;&#44; el flujo cerebral&#44; la oxigenaci&#243;n del par&#233;nquima &#40;presi&#243;n tisular de ox&#237;geno&#41; o el metabolismo locorregional &#40;microdi&#225;lisis&#41;&#46; Esta revisi&#243;n sintetiza el manejo general del paciente neuroquir&#250;rgico as&#237; como el de las principales complicaciones que puede desarrollar durante el postoperatorio&#46; Asimismo&#44; se propone un algoritmo de actuaci&#243;n para facilitar la decisi&#243;n de los profesionales responsables que incluye la neuromonitorizaci&#243;n multimodal&#46;</p></span>"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Neurosurgical patients frequently require admission to intensive care units&#44; either for postoperative management or for treating complications&#46; Most neurosurgical diseases require specific monitoring and prophylaxis&#46; The basic principle of neurosurgical patient management is to ensure correct brain tissue perfusion&#44; i&#46;e&#46;&#44; maintaining a sufficient blood flow to supply energy and oxygen to the brain parenchyma&#46; In the last few years&#44; several systems have been developed and improved for monitoring variables such as intracranial pressure&#44; cerebral electrical activity &#40;electroencephalography&#41;&#44; cerebral blood flow&#44; parenchymal oxygenation &#40;tissue oxygen pressure&#41; or locoregional metabolism &#40;microdialysis&#41;&#46; The present study provides an overview of the general management of neurosurgical patients and the main complications that may occur during the postoperative period&#46; An interventional algorithm is also proposed to facilitate physician decisions&#44; with the inclusion of multimodal neuromonitoring&#46;</p></span>"
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          "es" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Manejo general del paciente neuroquir&#250;rgico&#46;</p> <p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">DTC&#58; doppler transcraneal&#59; EEG&#58; electroencefalograma&#59; GCS&#58; <span class="elsevierStyleItalic">Glasgow Coma Score</span>&#59; HIC&#58; hipertensi&#243;n intracraneal&#59; LP&#58; lactato-piruvato&#59; MD&#58; microdi&#225;lisis&#59; PIC&#58; presi&#243;n intracraneal&#59; PPC&#58; presi&#243;n de perfusi&#243;n cerebral&#59; PtiO<span class="elsevierStyleInf">2</span>&#58; presi&#243;n tisular de ox&#237;geno&#59; SjO<span class="elsevierStyleInf">2</span>&#58; saturaci&#243;n yugular de ox&#237;geno&#59; VM&#58; ventilaci&#243;n mec&#225;nica&#46;</p> <p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">&#42; V&#233;ase <a class="elsevierStyleCrossRef" href="#fig0010">figura 2</a>&#46;</p>"
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          "es" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Manejo de la hipertensi&#243;n intracraneal&#46;</p> <p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">DVE&#58; drenaje ventricular externo&#59; PIC&#58; presi&#243;n intracraneal&#59; PPC&#58; presi&#243;n de perfusi&#243;n cerebral&#46;</p>"
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        0 => array:2 [
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                    0 => array:2 [
                      "titulo" => "Postoperative care of the neurosurgical patient"
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                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "M&#46; Siegemund"
                            1 => "L&#46;A&#46; Steiner"
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                    0 => array:2 [
                      "doi" => "10.1097/ACO.0000000000000229"
                      "Revista" => array:6 [
                        "tituloSerie" => "Curr Opin Anaesthesiol&#46;"
                        "fecha" => "2015"
                        "volumen" => "28"
                        "paginaInicial" => "487"
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                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/26263123"
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                      "titulo" => "Anaesthesia for elective neurosurgery"
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                            0 => "J&#46; Dinsmore"
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                    0 => array:2 [
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                        "fecha" => "2007"
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                      "titulo" => "Admission to neurological intensive care&#58; Who&#44; when&#44; and why&#63;"
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                      "doi" => "10.1136/jnnp.74.suppl_3.iii2"
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                        "tituloSerie" => "J Neurol Neurosurg Psychiatry&#46;"
                        "fecha" => "2003"
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                        "numero" => "Suppl 3"
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Puesta al día en Medicina Intensiva Perioperatoria
Optimización del manejo del paciente neuroquirúrgico en Medicina Intensiva
Optimization of the neurosurgical patient in Intensive Care
M. Santafé Colominaa,
Autor para correspondencia
santafe.manel@gmail.com

Autor para correspondencia.
, F. Arikan Abellób, A. Sánchez Corrala, R. Ferrer Rocaa
a Servicio de Medicina Intensiva, Hospital Vall d’Hebron, Barcelona, España
b Servicio de Neurocirugía, Hospital Vall d’Hebron, Barcelona, España
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Introducci&#243;n</span><p id="par0005" class="elsevierStylePara elsevierViewall">Los pacientes con patolog&#237;a neuroquir&#250;rgica representan un gran n&#250;mero de los ingresos en las unidades de cuidados intensivos &#40;UCI&#41;&#44; debido a que engloban los traumatismos craneoencef&#225;licos &#40;TCE&#41;&#44; los hematomas espont&#225;neos&#44; los ictus isqu&#233;micos&#44; las hemorragias subaracnoideas &#40;HSA&#41; o las cirug&#237;as electivas<a class="elsevierStyleCrossRef" href="#bib0390"><span class="elsevierStyleSup">1</span></a>&#46; De forma global&#44; el manejo del postoperatorio inmediato de estos pacientes se basa en intentar mantener una buena perfusi&#243;n tisular cerebral&#44; es decir&#44; mantener una adecuada presi&#243;n de perfusi&#243;n cerebral &#40;PPC&#41; asegurando una correcta oxigenaci&#243;n cerebral<a class="elsevierStyleCrossRef" href="#bib0395"><span class="elsevierStyleSup">2</span></a>&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">La indicaci&#243;n del ingreso en la UCI puede ser debida al ingreso postoperatorio de una intervenci&#243;n&#44; a un estado alterado de conciencia que requiera monitorizaci&#243;n cl&#237;nica o multimodal&#44; a que requiera ventilaci&#243;n mec&#225;nica &#40;VM&#41; para protecci&#243;n de la v&#237;a a&#233;rea&#44; o debido a complicaciones m&#233;dicas posquir&#250;rgicas como crisis epil&#233;pticas&#44; infecciones&#44; embolias pulmonares&#44; etc&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">3</span></a>&#46; Cabe destacar que aunque recientes estudios cuestionan el ingreso en la UCI de todos los pacientes neuroquir&#250;rgicos<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">4</span></a>&#44; el ingreso en las UCI especializadas ha demostrado mejores resultados finales<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">5</span></a>&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Las complicaciones neuroquir&#250;rgicas pueden ser fatales&#44; e incluyen infecci&#243;n de la herida quir&#250;rgica&#47;meningitis posquir&#250;rgica&#44; sangrado intraparenquimatoso y crisis epil&#233;pticas&#46; Para intentar evitar el desarrollo de complicaciones tendremos que prestar especial atenci&#243;n a las particularidades referentes a las profilaxis antibi&#243;ticas propias de la cirug&#237;a&#44; sedoanalgesia&#44; estrategia de VM as&#237; como la monitorizaci&#243;n multimodal espec&#237;fica cuando la requieran&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Cuidados postoperatorios</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Monitorizaci&#243;n cl&#237;nica y radiol&#243;gica</span><p id="par0020" class="elsevierStylePara elsevierViewall">Se realizar&#225; una exploraci&#243;n cl&#237;nica detallada prestando especial atenci&#243;n al nivel de conciencia registrando la escala de coma de Glasgow &#40;GCS&#41;&#44; tama&#241;o pupilar o la escala FOUR<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">6</span></a>&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Si el paciente presenta cambios abruptos y&#47;o mantenidos en la exploraci&#243;n neurol&#243;gica se deber&#237;a valorar la necesidad de realizar una prueba de imagen&#44; ya sea una tomograf&#237;a o una resonancia magn&#233;tica&#44; en busca de complicaciones tratables<a class="elsevierStyleCrossRefs" href="#bib0420"><span class="elsevierStyleSup">7&#44;8</span></a>&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Monitorizaci&#243;n respiratoria y necesidad de ventilaci&#243;n mec&#225;nica</span><p id="par0030" class="elsevierStylePara elsevierViewall">La disfunci&#243;n neuronal es una de las causas m&#225;s frecuentes de necesidad de VM<a class="elsevierStyleCrossRef" href="#bib0430"><span class="elsevierStyleSup">9</span></a>&#46; El uso de VM en pacientes responde tanto a la necesidad de mantener la v&#237;a a&#233;rea permeable en pacientes con bajo nivel de consciencia&#44; por el riesgo de aspiraci&#243;n secundario&#44; como para evitar la hipoxemia y la hipercapnia&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Los pacientes neurol&#243;gicos ventilados suelen requerir m&#225;s d&#237;as de ingreso en una UCI&#44; 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pudi&#233;ndose utilizar como medida temporal para disminuir la hipertensi&#243;n intracraneal &#40;HIC&#41; documentada y monitorizada&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Sedoanalgesia</span><p id="par0045" class="elsevierStylePara elsevierViewall">La necesidad de sedaci&#243;n profunda ha demostrado aumentar los d&#237;as de VM&#44; delirio y mortalidad en pacientes ingresados en la UCI<a class="elsevierStyleCrossRefs" href="#bib0450"><span class="elsevierStyleSup">13-15</span></a>&#46; Actualmente las gu&#237;as de sedaci&#243;n en UCI recomiendan&#44; en ausencia de contraindicaci&#243;n&#44; el uso de una estrategia de sedaci&#243;n ligera poniendo &#233;nfasis en priorizar la analgesia y el uso de f&#225;rmacos no benzodiacep&#237;nicos<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">16</span></a>&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">En los pacientes neuroquir&#250;rgicos es importante realizar una exploraci&#243;n neurol&#243;gica &#243;ptima&#44; y en este sentido es necesaria una sedoanalgesia que permita realizar ventanas neurol&#243;gicas de forma frecuente&#44; siendo la sedoanalgesia ligera segura en este subgrupo de pacientes<a class="elsevierStyleCrossRefs" href="#bib0470"><span class="elsevierStyleSup">17&#44;18</span></a>&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Fluidoterapia y alteraciones electrol&#237;ticas</span><p id="par0055" class="elsevierStylePara elsevierViewall">La fluidoterapia se suele dividir entre cristaloides y coloides&#46; Los cristaloides tienen mol&#233;culas peque&#241;as solubles y se subdividen en dos subgrupos&#58; las soluciones salinas y las soluciones balanceadas&#44; estas &#250;ltimas para conseguir una osmolaridad isot&#243;nica&#59; tienen diferentes iones seg&#250;n el tipo&#44; pero todos ellos tienen menos cloro&#58; el exceso de cloro ex&#243;geno se ha visto relacionado con un aumento de acidosis metab&#243;lica hiperclor&#233;mica&#44; disfunci&#243;n renal&#44; disfunci&#243;n gastrointestinal y secreci&#243;n de citoquinas inflamatorias<a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">19</span></a>&#46; El lactato de Ringer tiene menos osmolaridad que el resto de cristaloides&#44; por lo que grandes infusiones con este cristaloide puede aumentar el edema cerebral y la PIC<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">20</span></a>&#46; Para la resucitaci&#243;n y mantenimiento del paciente neuroquir&#250;rgico se deber&#237;an usar soluciones isot&#243;nicas&#44; evitando siempre las hipot&#243;nicas<a class="elsevierStyleCrossRefs" href="#bib0490"><span class="elsevierStyleSup">21&#44;22</span></a>&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Los coloides poseen mol&#233;culas m&#225;s grandes con menos capacidad para difundir por membranas semipermeables&#46; Actualmente se tiende a utilizar cristaloides por encima de los coloides debido a que no se han visto diferencias significativas en la mortalidad en coloides respecto al uso de cristaloides<a class="elsevierStyleCrossRef" href="#bib0500"><span class="elsevierStyleSup">23</span></a>&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">Las soluciones hipert&#243;nicas se usan para el tratamiento de la HIC&#44; 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Ante la aparici&#243;n de s&#237;ntomas con hiponatremia severa se recomienda la infusi&#243;n de suero salino hipert&#243;nico al 3&#37;<a class="elsevierStyleCrossRefs" href="#bib0480"><span class="elsevierStyleSup">19&#44;25&#44;26</span></a>&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">Tambi&#233;n podemos encontrar alteraciones del sodio en forma de hipernatremia&#46; La diabetes ins&#237;pida se caracteriza por deshidrataci&#243;n con hipernatremia a ra&#237;z de la disminuci&#243;n de la hormona antidiur&#233;tica&#46; El tratamiento se basa en reposici&#243;n h&#237;drica y con an&#225;logos de la ADH como la desmopresina o la vasopresina<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">20</span></a>&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Profilaxis posquir&#250;rgica</span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Antibi&#243;tica</span><p id="par0080" class="elsevierStylePara elsevierViewall">La prevalencia de infecci&#243;n de herida quir&#250;rgica oscila entre el 1 y el 11&#37;<a class="elsevierStyleCrossRef" href="#bib0520"><span class="elsevierStyleSup">27</span></a>&#46; Debido al riesgo que comporta una infecci&#243;n neuroquir&#250;rgica&#44; la profilaxis antibi&#243;tica en intervenciones neuroquir&#250;rgicas est&#225; ampliamente aceptada<a class="elsevierStyleCrossRefs" href="#bib0525"><span class="elsevierStyleSup">28&#44;29</span></a>&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">La elecci&#243;n del antibi&#243;tico buscar&#225; cubrir los g&#233;rmenes m&#225;s frecuentemente aislados&#58; <span class="elsevierStyleItalic">Staphylococcus aureus</span> y estafilococo plasmocoagulasa negativo&#46; Son opciones para esta profilaxis el cotrimoxazol o la cefazolina&#46; En las cirug&#237;as de base de cr&#225;neo con abordaje transnasal o&#47;y transoral se recomienda la profilaxis antibi&#243;tica con amoxicilina-&#225;cido clavul&#225;nico&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">En los pacientes con TCE est&#225; indicada la profilaxis antibi&#243;tica en fracturas craneales abiertas&#46; Se han postulado diferentes pautas&#58; amoxicilina-&#225;cido clavul&#225;nico o cefuroxima con metronidazol<a class="elsevierStyleCrossRefs" href="#bib0535"><span class="elsevierStyleSup">30-32</span></a>&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">En fracturas no abiertas de base de cr&#225;neo el uso de antibi&#243;ticos parece no modificar la incidencia de infecciones del SNC&#46; En caso de tener asociada f&#237;stula de LCR hay menor evidencia de si el uso de antibi&#243;ticos tiene o no utilidad<a class="elsevierStyleCrossRefs" href="#bib0550"><span class="elsevierStyleSup">33-35</span></a>&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">En los sensores de neuromonitorizaci&#243;n invasivos&#44; como el sensor de PIC&#44; el de presi&#243;n tisular de ox&#237;geno &#40;PtiO<span class="elsevierStyleInf">2</span>&#41; y el de microdi&#225;lisis&#44; no hay evidencia que apoye el uso de antibi&#243;ticos durante el tiempo de inserci&#243;n de estos dispositivos<a class="elsevierStyleCrossRefs" href="#bib0565"><span class="elsevierStyleSup">36-38</span></a>&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">En la colocaci&#243;n de un drenaje ventricular externo no est&#225; recomendado el tratamiento intravenoso durante el tiempo de inserci&#243;n del drenaje por el riesgo de aumentar resistencias antibi&#243;ticas&#44; pero se recomienda una dosis previa a la inserci&#243;n<a class="elsevierStyleCrossRef" href="#bib0580"><span class="elsevierStyleSup">39</span></a>&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">En cirug&#237;a raquimedular la profilaxis quir&#250;rgica antibi&#243;tica est&#225; indicada&#59; debe valorarse el antibi&#243;tico en funci&#243;n de cada paciente&#44; de las comorbilidades y de los factores de riesgo&#44; aunque nuevamente la cefazolina suele ser el antibi&#243;tico de elecci&#243;n<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">40</span></a>&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Prevenci&#243;n de convulsiones</span><p id="par0115" class="elsevierStylePara elsevierViewall">El uso de f&#225;rmacos anticonvulsivantes profil&#225;cticos en procedimientos neuroquir&#250;rgicos es controvertido en todas las patolog&#237;as neuroquir&#250;rgicas y existe poca evidencia al respecto&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">Aunque hasta un 60&#37; de los pacientes con tumor cerebral pueden presentar convulsiones en su evoluci&#243;n<a class="elsevierStyleCrossRef" href="#bib0590"><span class="elsevierStyleSup">41</span></a>&#44; el uso de anticonvulsivantes no ha demostrado disminuir la aparici&#243;n de crisis epil&#233;pticas en estos pacientes<a class="elsevierStyleCrossRef" href="#bib0595"><span class="elsevierStyleSup">42</span></a> y no est&#225; recomendado su uso rutinario<a class="elsevierStyleCrossRefs" href="#bib0490"><span class="elsevierStyleSup">21&#44;43</span></a>&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">En los pacientes con traumatismo craneal grave se recomienda el uso de fenito&#237;na para disminuir la incidencia de crisis epil&#233;pticas postraum&#225;ticas tempranas&#46; Aunque se ha propuesto el uso de levetiracetam&#44; no hay suficiente evidencia actual para recomendarlo sobre la fenito&#237;na en este subgrupo de pacientes<a class="elsevierStyleCrossRef" href="#bib0445"><span class="elsevierStyleSup">12</span></a>&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Pese a la alta incidencia de crisis epil&#233;pticas en los pacientes afectos de HSA &#40;entre el 4 y el 26&#37; en el momento de la hemorragia&#41;<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">44</span></a>&#44; no se recomienda el uso sistem&#225;tico de anticonvulsivantes en la HSA&#46; Recientes revisiones sistem&#225;ticas concluyen que no existen pruebas para apoyar o refutar el uso de f&#225;rmacos antiepil&#233;pticos para la prevenci&#243;n primaria o secundaria de las convulsiones relacionadas con la HSA<a class="elsevierStyleCrossRefs" href="#bib0610"><span class="elsevierStyleSup">45&#44;46</span></a>&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">Dada la disparidad de patolog&#237;a basal que condiciona la craneotom&#237;a&#44; hay poca evidencia para poder recomendar o no el uso de f&#225;rmacos anticonvulsivantes en craniotom&#237;as<a class="elsevierStyleCrossRef" href="#bib0620"><span class="elsevierStyleSup">47</span></a>&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">En el accidente vascular las gu&#237;as no recomiendan el uso profil&#225;ctico de antiepil&#233;pticos&#44; pero s&#237; su tratamiento en caso de aparici&#243;n de convulsiones&#46; Una revisi&#243;n de la Cochrane<a class="elsevierStyleCrossRef" href="#bib0625"><span class="elsevierStyleSup">48</span></a> concluye no haber efectos beneficiosos al comparar el &#225;cido valproico con placebo para la prevenci&#243;n primaria de las convulsiones despu&#233;s de la hemorragia cerebral<a class="elsevierStyleCrossRef" href="#bib0630"><span class="elsevierStyleSup">49</span></a>&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Profilaxis antitromb&#243;tica</span><p id="par0145" class="elsevierStylePara elsevierViewall">La tromboprofilaxis debe individualizarse a cada enfermo teniendo en cuenta los factores de riesgo de tromboembolismo<a class="elsevierStyleCrossRefs" href="#bib0635"><span class="elsevierStyleSup">50&#44;51</span></a>&#44; como las patolog&#237;as subyacentes&#46; Estudios recientes sugieren que el uso de profilaxis farmacol&#243;gica no aumenta significativamente el sangrado craneal<a class="elsevierStyleCrossRef" href="#bib0645"><span class="elsevierStyleSup">52</span></a>&#46;</p><p id="par0150" class="elsevierStylePara elsevierViewall">Podemos diferenciar entre la tromboprofilaxis mec&#225;nica&#44; con medias de compresi&#243;n neum&#225;tica intermitente&#44; y la tromboprofilaxis farmacol&#243;gica&#44; con la heparina de bajo peso molecular subcut&#225;nea o heparina no fraccionada subcut&#225;nea<a class="elsevierStyleCrossRef" href="#bib0635"><span class="elsevierStyleSup">50</span></a>&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">Si nos centramos en las patolog&#237;as neuroquir&#250;rgicas&#44; las gu&#237;as recomiendan el uso precoz de tromboprofilaxis mec&#225;nica y el paso a farmacol&#243;gica cuando sea posible&#44; asoci&#225;ndose ambas en caso de alto riesgo&#44; como ictus isqu&#233;mico y lesi&#243;n raquimedular&#46; En las hemorragias intracraneales no traum&#225;ticas se recomienda retrasar el uso de la tromboprofilaxis farmacol&#243;gica hasta 48<span class="elsevierStyleHsp" style=""></span>h del ingreso&#44; tras normalizar la coagulaci&#243;n y si el hematoma permanece estable&#46; En el TCE con hemorragia la recomendaci&#243;n es tromboprofilaxis mec&#225;nica hasta 24-48<span class="elsevierStyleHsp" style=""></span>h&#44; donde se valorar&#237;a el paso a farmacol&#243;gica&#46; En los pacientes con HSA tambi&#233;n se recomienda iniciar profilaxis mec&#225;nica al ingreso en el hospital y el uso de profilaxis farmacol&#243;gica tras haber asegurado el aneurisma&#46; En los pacientes con craneotom&#237;as electivas se recomienda iniciar profilaxis farmacol&#243;gica en las primeras 24<span class="elsevierStyleHsp" style=""></span>h posteriores<a class="elsevierStyleCrossRefs" href="#bib0635"><span class="elsevierStyleSup">50&#44;53</span></a>&#46;</p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Neuromonitorizaci&#243;n</span><p id="par0160" class="elsevierStylePara elsevierViewall">Cuando la exploraci&#243;n neurol&#243;gica no es posible o esta no nos da suficiente informaci&#243;n se valorar&#225; la neuromonitorizaci&#243;n avanzada&#46; El algoritmo de neuromonitorizaci&#243;n se describe en la <a class="elsevierStyleCrossRef" href="#fig0005">figura 1</a>&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Presi&#243;n intracraneal</span><p id="par0165" class="elsevierStylePara elsevierViewall">La monitorizaci&#243;n de la PIC resulta fundamental en los cuidados de los pacientes con lesi&#243;n cerebral difusa&#44; habi&#233;ndose asociado incrementos de la PIC con un aumento de la mortalidad<a class="elsevierStyleCrossRefs" href="#bib0655"><span class="elsevierStyleSup">54-56</span></a>&#46; Los valores normales de PIC est&#225;n entre 5 y 15<span class="elsevierStyleHsp" style=""></span>mmHg<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46; Generalmente unas cifras &#62;<span class="elsevierStyleHsp" style=""></span>20-25<span class="elsevierStyleHsp" style=""></span>mmHg se consideran indicaci&#243;n de tratamiento para el control de esta&#46; Las recomendaciones de control de la HIC se recogen en la <a class="elsevierStyleCrossRef" href="#fig0010">figura 2</a>&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0170" class="elsevierStylePara elsevierViewall">Se recomienda la medici&#243;n de la PIC en pacientes con TCE con GCS inicial igual o inferior a 8 con TC anormal y en aquellos con TC normal pero &#62;<span class="elsevierStyleHsp" style=""></span>40<span class="elsevierStyleHsp" style=""></span>a&#241;os&#44; hipotensi&#243;n arterial &#40;sist&#243;lica &#60;<span class="elsevierStyleHsp" style=""></span>90<span class="elsevierStyleHsp" style=""></span>mmHg&#41; o respuesta motora anormal al dolor<a class="elsevierStyleCrossRef" href="#bib0675"><span class="elsevierStyleSup">58</span></a>&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">La monitorizaci&#243;n de la PIC tambi&#233;n est&#225; recomendada en pacientes en coma con contusiones&#44; o con imposibilidad de exploraci&#243;n cl&#237;nica&#44; o en los que la suspensi&#243;n de la sedaci&#243;n es peligrosa&#44; y despu&#233;s de la craneotom&#237;a secundaria&#46; Adem&#225;s debe ser considerada en los pacientes con hematoma agudo supratentorial con riesgo de HIC<a class="elsevierStyleCrossRefs" href="#bib0670"><span class="elsevierStyleSup">57&#44;59</span></a>&#46;</p><p id="par0180" class="elsevierStylePara elsevierViewall">Con la PIC podemos obtener la PPC&#44; definida como presi&#243;n arterial media<span class="elsevierStyleHsp" style=""></span>&#8722;<span class="elsevierStyleHsp" style=""></span>PIC<a class="elsevierStyleCrossRef" href="#bib0685"><span class="elsevierStyleSup">60</span></a>&#46; El valor objetivo es mantener una PPC &#62;<span class="elsevierStyleHsp" style=""></span>60<span class="elsevierStyleHsp" style=""></span>mmHg&#59; niveles menores se han asociado a peor resultado final<a class="elsevierStyleCrossRef" href="#bib0690"><span class="elsevierStyleSup">61</span></a>&#46;</p><p id="par0185" class="elsevierStylePara elsevierViewall">Tambi&#233;n la monitorizaci&#243;n de la PIC nos permite objetivar la autorregulaci&#243;n cerebral&#44; es decir&#44; la capacidad que tiene el cerebro de realizar vasoconstricci&#243;n con aumento de la presi&#243;n arterial&#46; El &#237;ndice de velocidad media basado en la PPC y el &#237;ndice de autorregulaci&#243;n &#40;ARI&#41; predicen la mortalidad&#44; y el resultado neurol&#243;gico final en el TCE y el ARI&#44; el resultado neurol&#243;gico en la HSA<a class="elsevierStyleCrossRef" href="#bib0695"><span class="elsevierStyleSup">62</span></a>&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Flujo cerebral</span><p id="par0190" class="elsevierStylePara elsevierViewall">Podemos determinar el flujo cerebral mediante medidas invasivas como la flujometr&#237;a de difusi&#243;n t&#233;rmica&#46; El principal inconveniente de esta t&#233;cnica es que es un sistema de medici&#243;n regional que ofrece una informaci&#243;n limitada a un &#225;rea del par&#233;nquima<a class="elsevierStyleCrossRef" href="#bib0700"><span class="elsevierStyleSup">63</span></a>&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">M&#225;s com&#250;n es el uso de ultrasonograf&#237;a con color y doppler transcraneal para la estimaci&#243;n del flujo de regiones cerebrales m&#225;s amplias&#44; que ha demostrado su utilidad sobre todo en la HSA para la monitorizaci&#243;n semicontinua del d&#233;ficit isqu&#233;mico tard&#237;o y vasoespasmo<a class="elsevierStyleCrossRefs" href="#bib0610"><span class="elsevierStyleSup">45&#44;64</span></a>&#46; Pese a esto&#44; no todos los pacientes tienen una buena ventana ac&#250;stica y la exactitud de la medida depende de la habilidad del operador<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46;</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Oxigenaci&#243;n cerebral</span><p id="par0200" class="elsevierStylePara elsevierViewall">Otro de los pilares de la perfusi&#243;n cerebral es la correcta oxigenaci&#243;n cerebral&#44; y para esto nos podemos valer de la pulsioximetr&#237;a para conocer la oxigenaci&#243;n sist&#233;mica&#44; adem&#225;s del etCO<span class="elsevierStyleInf">2</span> para evitar la hiperventilaci&#243;n y la vasoconstricci&#243;n cerebral secundaria<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46;</p><p id="par0205" class="elsevierStylePara elsevierViewall">El sensor de PtiO<span class="elsevierStyleInf">2</span> nos ofrece una saturaci&#243;n local y continua del par&#233;nquima&#44; con unos valores normales establecidos entre 20-35<span class="elsevierStyleHsp" style=""></span>mmHg<a class="elsevierStyleCrossRef" href="#bib0710"><span class="elsevierStyleSup">65</span></a>&#46; Existe una relaci&#243;n entre valores bajos de PtiO<span class="elsevierStyleInf">2</span> y morbimortalidad&#44; siendo indicaci&#243;n de tratamiento valores inferiores a 20<span class="elsevierStyleHsp" style=""></span>mmHg<a class="elsevierStyleCrossRef" href="#bib0715"><span class="elsevierStyleSup">66</span></a>&#46; Un valor inferior a 20<span class="elsevierStyleHsp" style=""></span>mmHg puede significar un compromiso en la oxigenaci&#243;n y debe considerarse un tratamiento para optimizar el aporte de ox&#237;geno<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46;</p><p id="par0210" class="elsevierStylePara elsevierViewall">La SjvO<span class="elsevierStyleInf">2</span> nos ofrece informaci&#243;n global sobre el uso de ox&#237;geno cerebral&#46; Se mide mediante un cat&#233;ter colocado en la vena yugular interna dominante con el extremo en el bulbo yugular<a class="elsevierStyleCrossRef" href="#bib0720"><span class="elsevierStyleSup">67</span></a>&#46; Se consideran valores normales entre el 55 y el 75&#37;&#46; Valores inferiores al 55&#37; son indicativos de riesgo de isquemia y por encima del 75&#37; pueden significar hiperemia&#44; disminuci&#243;n del metabolismo o muerte celular<a class="elsevierStyleCrossRefs" href="#bib0725"><span class="elsevierStyleSup">68-70</span></a>&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">La implementaci&#243;n de los sensores de PtiO<span class="elsevierStyleInf">2</span> y SjvO<span class="elsevierStyleInf">2</span> est&#225; recomendada en pacientes con riesgo de isquemia<a class="elsevierStyleCrossRefs" href="#bib0445"><span class="elsevierStyleSup">12&#44;57&#44;71</span></a>&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">Mediante el uso de la <span class="elsevierStyleItalic">near infrared spectroscopy</span> &#40;NIRS&#41; cerebral se puede estimar la saturaci&#243;n de ox&#237;geno del tejido cerebral<a class="elsevierStyleCrossRef" href="#bib0745"><span class="elsevierStyleSup">72</span></a>&#46; Su uso no est&#225; recomendado en las gu&#237;as de neuromonitorizaci&#243;n debido a la evidencia limitada y a las limitaciones de la t&#233;cnica en adultos<a class="elsevierStyleCrossRefs" href="#bib0670"><span class="elsevierStyleSup">57&#44;73</span></a>&#46;</p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Metabolismo cerebral</span><p id="par0225" class="elsevierStylePara elsevierViewall">Una mala perfusi&#243;n tisular del par&#233;nquima cerebral alterar&#225; la homeostasis extracelular&#44; la cual se puede medir mediante un cat&#233;ter de microdi&#225;lisis<a class="elsevierStyleCrossRef" href="#bib0755"><span class="elsevierStyleSup">74</span></a>&#46; Normalmente se suele medir lactato&#44; piruvato&#44; glucosa&#44; glutamato y glicerol&#44; que permiten determinar la existencia de una crisis metab&#243;lica<a class="elsevierStyleCrossRef" href="#bib0755"><span class="elsevierStyleSup">74</span></a>&#46;</p><p id="par0230" class="elsevierStylePara elsevierViewall">La glucosa es la principal fuente de energ&#237;a del cerebro&#46; Una disminuci&#243;n mantenida a nivel cerebral &#40;&#60;<span class="elsevierStyleHsp" style=""></span>0&#44;8<span class="elsevierStyleHsp" style=""></span>mM&#41; se ha asociado a peores resultados posterior a un TCE grave y HSA<a class="elsevierStyleCrossRef" href="#bib0755"><span class="elsevierStyleSup">74</span></a>&#46;</p><p id="par0235" class="elsevierStylePara elsevierViewall">La glucosa en condiciones normales se metaboliza a piruvato produciendo ATP en el ciclo de Krebs&#59; en cambio&#44; en situaci&#243;n de hipoxia o disfunci&#243;n mitocondrial el piruvato es metabolizado a lactato&#46; Un aumento de la ratio lactato&#47;piruvato &#40;LP&#41; en el espacio extracelular traduce una situaci&#243;n de hipoxia o de disfunci&#243;n neuronal&#46; Un aumento de LP con disminuci&#243;n de piruvato es sugestivo de isquemia cl&#225;sica&#59; en cambio&#44; un aumento de LP con piruvato normal sugiere una causa no isqu&#233;mica&#44; como disfunci&#243;n mitocondrial<a class="elsevierStyleCrossRef" href="#bib0760"><span class="elsevierStyleSup">75</span></a>&#46;</p><p id="par0240" class="elsevierStylePara elsevierViewall">El glutamato se ha relacionado con el da&#241;o celular y la respuesta inflamatoria&#46; Una elevaci&#243;n del glutamato puede traducir hipoxia y&#47;o isquemia&#46; El glicerol es un componente lip&#237;dico de las neuronas y un marcador de da&#241;o celular neuronal&#44; por lo que una elevaci&#243;n del glicerol es un marcador de hipoxia y&#47;o isquemia y de destrucci&#243;n de la membrana neuronal<a class="elsevierStyleCrossRef" href="#bib0760"><span class="elsevierStyleSup">75</span></a>&#46;</p><p id="par0245" class="elsevierStylePara elsevierViewall">El uso de microdi&#225;lisis est&#225; recomendado en los pacientes con riesgo de isquemia cerebral&#44; hipoxia y situaciones de d&#233;ficit de glucosa<a class="elsevierStyleCrossRefs" href="#bib0705"><span class="elsevierStyleSup">64&#44;76</span></a>&#46;</p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Actividad el&#233;ctrica cerebral</span><p id="par0250" class="elsevierStylePara elsevierViewall">El electroencefalograma &#40;EEG&#41; registra la actividad el&#233;ctrica y es fundamental para detectar crisis epil&#233;pticas&#44; sobre todo crisis no convulsivas&#46; El EEG continuo &#40;cEEG&#41; tiene m&#225;s posibilidades de detectar crisis no convulsivas que el EEG convencional<a class="elsevierStyleCrossRef" href="#bib0770"><span class="elsevierStyleSup">77</span></a>&#44; pero la dificultad t&#233;cnica y de interpretaci&#243;n&#44; as&#237; como la disponibilidad de la misma&#44; limitan la generalizaci&#243;n de la t&#233;cnica&#46;</p><p id="par0255" class="elsevierStylePara elsevierViewall">El cEEG est&#225; indicado en los pacientes con alteraci&#243;n del nivel de conciencia persistente o inexplicada<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">57</span></a>&#46; El EEG es &#250;til en el diagn&#243;stico del estatus epil&#233;ptico no convulsivo&#44; pero tambi&#233;n para evaluar la respuesta al tratamiento&#46; As&#237; mismo&#44; en pacientes con HSA de alto grado el cEEG puede poner en evidencia un d&#233;ficit neuronal isqu&#233;mico tard&#237;o de nueva aparici&#243;n&#46;</p></span></span></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conclusiones</span><p id="par0260" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">&#8211;</span><p id="par0265" class="elsevierStylePara elsevierViewall">El paciente neuroquir&#250;rgico requiere un manejo postoperatorio integral&#44; incluyendo una monitorizaci&#243;n din&#225;mica en funci&#243;n de su situaci&#243;n cl&#237;nica&#46;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">&#8211;</span><p id="par0270" class="elsevierStylePara elsevierViewall">En pacientes conscientes se realizar&#225; una exploraci&#243;n neurol&#243;gica completa y frecuente para detectar la aparici&#243;n de d&#233;ficits no presentes a su ingreso en la UCI&#46;</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">&#8211;</span><p id="par0275" class="elsevierStylePara elsevierViewall">Los pacientes neurol&#243;gicos precisan una estrategia ventilatoria y de analgosedaci&#243;n que favorezca la oxigenaci&#243;n cerebral y permita ventanas peri&#243;dicas de sedaci&#243;n&#46;</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">&#8211;</span><p id="par0280" class="elsevierStylePara elsevierViewall">En pacientes sedados donde la exploraci&#243;n cl&#237;nica completa no es posible se considerar&#225; la monitorizaci&#243;n multimodal&#44; incluyendo los dispositivos de medici&#243;n de PIC&#44; PtiO<span class="elsevierStyleInf">2</span>&#44; EEG&#8230; que nos ayuden a optimizar el manejo y a detectar la aparici&#243;n de complicaciones&#46;</p></li></ul></p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Conflicto de intereses</span><p id="par0285" class="elsevierStylePara elsevierViewall">Los autores refieren no tener conflicto de intereses&#46;</p></span></span>"
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              "titulo" => "Monitorizaci&#243;n respiratoria y necesidad de ventilaci&#243;n mec&#225;nica"
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                  "titulo" => "Flujo cerebral"
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                  "titulo" => "Oxigenaci&#243;n cerebral"
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                  "titulo" => "Metabolismo cerebral"
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                  "titulo" => "Actividad el&#233;ctrica cerebral"
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          "titulo" => "Conflicto de intereses"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Los pacientes con patolog&#237;a neuroquir&#250;rgica requieren frecuentemente el ingreso en unidades de cuidados intensivos tanto para su manejo en el postoperatorio inmediato como para el control de las complicaciones que puedan presentar&#46; La patolog&#237;a neuroquir&#250;rgica es amplia y requiere profilaxis&#44; tratamiento y monitorizaci&#243;n espec&#237;fica&#46; El tratamiento del paciente neuroquir&#250;rgico se basa en asegurar una correcta perfusi&#243;n tisular cerebral&#44; es decir&#44; mantener un flujo sangu&#237;neo suficiente para aportar energ&#237;a al par&#233;nquima cerebral&#46; Con el objetivo de optimizar el tratamiento y el manejo de estos pacientes&#44; en los &#250;ltimos a&#241;os se han desarrollado y perfeccionado diferentes sistemas para monitorizar variables como la presi&#243;n intracraneal&#44; la actividad el&#233;ctrica cerebral &#40;electroencefalograf&#237;a&#41;&#44; el flujo cerebral&#44; la oxigenaci&#243;n del par&#233;nquima &#40;presi&#243;n tisular de ox&#237;geno&#41; o el metabolismo locorregional &#40;microdi&#225;lisis&#41;&#46; Esta revisi&#243;n sintetiza el manejo general del paciente neuroquir&#250;rgico as&#237; como el de las principales complicaciones que puede desarrollar durante el postoperatorio&#46; Asimismo&#44; se propone un algoritmo de actuaci&#243;n para facilitar la decisi&#243;n de los profesionales responsables que incluye la neuromonitorizaci&#243;n multimodal&#46;</p></span>"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Neurosurgical patients frequently require admission to intensive care units&#44; either for postoperative management or for treating complications&#46; Most neurosurgical diseases require specific monitoring and prophylaxis&#46; The basic principle of neurosurgical patient management is to ensure correct brain tissue perfusion&#44; i&#46;e&#46;&#44; maintaining a sufficient blood flow to supply energy and oxygen to the brain parenchyma&#46; In the last few years&#44; several systems have been developed and improved for monitoring variables such as intracranial pressure&#44; cerebral electrical activity &#40;electroencephalography&#41;&#44; cerebral blood flow&#44; parenchymal oxygenation &#40;tissue oxygen pressure&#41; or locoregional metabolism &#40;microdialysis&#41;&#46; The present study provides an overview of the general management of neurosurgical patients and the main complications that may occur during the postoperative period&#46; An interventional algorithm is also proposed to facilitate physician decisions&#44; with the inclusion of multimodal neuromonitoring&#46;</p></span>"
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          "es" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Manejo general del paciente neuroquir&#250;rgico&#46;</p> <p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">DTC&#58; doppler transcraneal&#59; EEG&#58; electroencefalograma&#59; GCS&#58; <span class="elsevierStyleItalic">Glasgow Coma Score</span>&#59; HIC&#58; hipertensi&#243;n intracraneal&#59; LP&#58; lactato-piruvato&#59; MD&#58; microdi&#225;lisis&#59; PIC&#58; presi&#243;n intracraneal&#59; PPC&#58; presi&#243;n de perfusi&#243;n cerebral&#59; PtiO<span class="elsevierStyleInf">2</span>&#58; presi&#243;n tisular de ox&#237;geno&#59; SjO<span class="elsevierStyleInf">2</span>&#58; saturaci&#243;n yugular de ox&#237;geno&#59; VM&#58; ventilaci&#243;n mec&#225;nica&#46;</p> <p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">&#42; V&#233;ase <a class="elsevierStyleCrossRef" href="#fig0010">figura 2</a>&#46;</p>"
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                        "tituloSerie" => "J Neurol Neurosurg Psychiatry&#46;"
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                      "titulo" => "The utility of routine intensive care admission for patients undergoing intracranial neurosurgical procedures&#58; A systematic review"
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                            0 => "C&#46;C&#46; De Almeida"
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                            3 => "B&#46;S&#46; Kasper"
                            4 => "C&#46;C&#46; Chen"
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                        "tituloSerie" => "Neurocrit Care&#46;"
                        "fecha" => "2018"
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                      "titulo" => "A dedicated neurological intensive care unit offers improved outcomes for patients with brain and spine injuries"
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                          "etal" => true
                          "autores" => array:6 [
                            0 => "J&#46;H&#46; Jeong"
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                            4 => "J&#46; Chang"
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                      "doi" => "10.1177/0885066617706675"
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                        "tituloSerie" => "J Intensive Care Med&#46;"
                        "fecha" => "2019"
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                      "titulo" => "Validation of a new coma scale&#58; The FOUR score"
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                            0 => "E&#46;F&#46; Wijdicks"
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                            3 => "E&#46;M&#46; Manno"
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                      "titulo" => "Imaging in neurocritical care practice"
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                        0 => array:2 [
                          "etal" => false
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                            0 => "C&#46; Williamson"
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                            2 => "J&#46;P&#46; Klein"
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                      ]
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                  ]
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                      "doi" => "10.1055/s-0037-1608770"
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                        "tituloSerie" => "Semin Respir Crit Care Med&#46;"
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                      "titulo" => "Imaging and decision-making in neurocritical care"
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                      "titulo" => "Characteristics and outcomes in adult patients receiving mechanical ventilation&#58; A 28-day international study"
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ISSN: 02105691
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