<?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>0212-7199</journal-id>
<journal-title><![CDATA[Anales de Medicina Interna]]></journal-title>
<abbrev-journal-title><![CDATA[An. Med. Interna (Madrid)]]></abbrev-journal-title>
<issn>0212-7199</issn>
<publisher>
<publisher-name><![CDATA[Arán Ediciones, S. L.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0212-71992007000400009</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Gangrena de Fournier: Perspectivas actuales]]></article-title>
<article-title xml:lang="en"><![CDATA[Fournier's gangrene: Current perspectives]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urdaneta Carruyo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
<xref ref-type="aff" rid="A02"/>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez Parr]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urdaneta Contreras]]></surname>
<given-names><![CDATA[A. V.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Universitario de Los Andes Unidad de Nefrología Pediátrica y Metabolismo Mineral ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Hospital Universitario de Los Andes Laboratorio de Investigaciones Pediátricas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad de Los Andes Facultad de Medicina Grupo Transdiciplinario de Investigaciones Biomédicas]]></institution>
<addr-line><![CDATA[Mérida ]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2007</year>
</pub-date>
<volume>24</volume>
<numero>4</numero>
<fpage>190</fpage>
<lpage>194</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S0212-71992007000400009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S0212-71992007000400009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S0212-71992007000400009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La Gangrena de Fournier (GF) es una fascitis necrotizante sinérgica, multimicrobiana, de origen infeccioso, que produce gangrena de piel de región genital, perineal, o perianal. Su mayor frecuencia se observa en pacientes de 20 a 50 años, los varones se afectan más que las hembras en proporción 10:1 y la tasa de mortalidad aún es alta. El manejo clínico debe ser rápido y oportuno, con aplicación intravenosa de líquidos, electrolitos y antibióticos de amplio espectro; a fin de lograr la estabilización hemodinámica del paciente antes de la intervención quirúrgica. La cirugía precoz con debridamiento extenso de tejidos desvitalizados, constituye la base principal del mismo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The Fournier Gangrene (FG) is a synergistic, polymicrobial, necrotizing fasciitis with infectious origin that produces gangrene of the perineal, genital or perianal skin. The number bigger than cases happens between 20 at 50 years, the males are affected more than the females in proportion 10:1 and the mortality rate is high yet. The clinical manage of the GF must be fast and opportune with intravenous application of fluids, electrolytes and systemic broad-spectrum antibiotic therapy; and avoid the hemodynamic stabilization of the patient before the surgery. The precocious surgery with debridament of the necrotizing tissues constitutes the main objective of the treatment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Gangrena de Fournier]]></kwd>
<kwd lng="es"><![CDATA[Fascitis necrotizante]]></kwd>
<kwd lng="es"><![CDATA[Necrosis infecciosa de tejidos blandos]]></kwd>
<kwd lng="es"><![CDATA[Tromboarteritis obliterativa infecciosa]]></kwd>
<kwd lng="es"><![CDATA[Trombosis vascular subcutánea]]></kwd>
<kwd lng="en"><![CDATA[Fournier's gangrene]]></kwd>
<kwd lng="en"><![CDATA[Necrotizing fasciitis]]></kwd>
<kwd lng="en"><![CDATA[Infectious necrozing of soft tissues]]></kwd>
<kwd lng="en"><![CDATA[Infective obliterative thromboarteritis]]></kwd>
<kwd lng="en"><![CDATA[Thrombosis of small subcutaneous vessels]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  &nbsp;    <p><font face="Verdana" size="4"> <b><a name="top"></a>Gangrena de Fournier. Perspectivas actuales </b></font></p>     <p><font face="Verdana" size="4"><b>Fournier's gangrene. Current perspectives</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><b><font face="Verdana" size="2">E. Urdaneta Carruyo<SUP>1-3</sup>, A. Méndez  Parr<sup>1,3</sup>, A. V. Urdaneta Contreras<sup>2</sup></font></b></p>     <p><font face="Verdana" size="2"><sup>1</sup>Unidad de Nefrolog&iacute;a Pedi&aacute;trica y Metabolismo Mineral. Hospital Universitario de Los Andes.    <br> <sup>2</sup>Laboratorio de Investigaciones Pedi&aacute;tricas.    <br> <sup>3</sup>Grupo Transdiciplinario de Investigaciones Biom&eacute;dicas. Facultad de Medicina. Universidad de Los Andes. M&eacute;rida. Venezuela</font></p>      <p><font face="Verdana" size="2"><a href="#back">Dirección para  correspondencia</a></font></p>      ]]></body>
<body><![CDATA[<p>&nbsp;</p>      <p>&nbsp;</p>  <hr size="1">      <p><b><font face="Verdana" size="2">RESUMEN</font></b></p>     <p><font face="Verdana" size="2">La Gangrena de Fournier (GF) es una fascitis necrotizante sin&eacute;rgica, multimicrobiana, de origen infeccioso, que produce gangrena de piel de regi&oacute;n genital, perineal, o perianal. Su mayor frecuencia se observa en pacientes de 20 a 50 a&ntilde;os, los varones se afectan m&aacute;s que las hembras en proporci&oacute;n 10:1 y la tasa de mortalidad a&uacute;n es alta.    <br> El manejo cl&iacute;nico debe ser r&aacute;pido y oportuno, con aplicaci&oacute;n intravenosa de l&iacute;quidos, electrolitos y antibi&oacute;ticos de amplio espectro; a fin de lograr la estabilizaci&oacute;n hemodin&aacute;mica del paciente antes de la intervenci&oacute;n quir&uacute;rgica. La cirug&iacute;a precoz con debridamiento extenso de tejidos desvitalizados, constituye la base principal del mismo.</font></p>     <p><font face="Verdana" size="2"><b>Palabras clave</b>: Gangrena de Fournier. Fascitis necrotizante. Necrosis infecciosa de tejidos blandos. Tromboarteritis obliterativa infecciosa. Trombosis vascular subcut&aacute;nea.</font></p> <hr size="1">     <p><b><font face="Verdana" size="2">ABSTRACT</font></b></p>     <p><font face="Verdana" size="2">The Fournier Gangrene (FG) is a synergistic, polymicrobial, necrotizing fasciitis with infectious origin that produces gangrene of the perineal, genital or perianal skin. The number bigger than cases happens between 20 at 50 years, the males are affected more than the females in proportion 10:1 and the mortality rate is high yet.    <br> The clinical manage of the GF must be fast and opportune with intravenous application of fluids, electrolytes and systemic broad-spectrum antibiotic therapy; and avoid the hemodynamic stabilization of the patient before the surgery. The precocious surgery with debridament of the necrotizing tissues constitutes the main objective of the treatment.</font></p>     <p><font face="Verdana" size="2"><b>Key words</b>: Fournier's gangrene. Necrotizing fasciitis. Infectious necrozing of soft tissues. Infective obliterative thromboarteritis. Thrombosis of small subcutaneous vessels.</font></p>  <hr size="1">      ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><b><font face="Verdana">Introducción</font></b></p>    <p><font face="Verdana" size="2">La gangrena de Fournier (GF) se conoce desde la antig&uuml;edad. Seg&uacute;n Litchfiel (1) es probable que el rey <i>Herodes el Grande</i> de Judea la hubiese padecido asociada a diabetes mellitus y de acuerdo con las observaciones de Nathan (2), es posible que el famoso m&eacute;dico persa Avicenna, la hubiese notado en el a&ntilde;o 877 d.C. Baurienne en 1764, realiz&oacute; por primera vez la descripci&oacute;n cl&iacute;nica de la enfermedad (3), y posteriormente, en 1883, Jean Alfred Fournier, utiliz&oacute; el t&eacute;rmino de <i>gangrena fulminante del pene y del escroto</i> al describir esta entidad cl&iacute;nica, en cinco varones j&oacute;venes con gangrena escrotal (4). En la actualidad, a&uacute;n se conoce con su nombre esta enfermedad.</font></p>     <p>&nbsp;</p>     <p><b><font face="Verdana">Definición</font></b></p>     <p><font face="Verdana" size="2">La GF actualmente se define como una forma espec&iacute;fica de fascitis necrotizante sin&eacute;rgica, r&aacute;pida, progresiva y de origen multibacteriano, que afecta principalmente la fascie muscular de regi&oacute;n perineal, genital o perianal e incluso de pared abdominal; con punto de partida genitourinario, colorectal o idiop&aacute;tico. Todo ello, acompa&ntilde;ado de gangrena de piel de estas &aacute;reas debida a trombosis de vasos sangu&iacute;neos subcut&aacute;neos (5).</font></p>     <p>&nbsp;</p>     <p><b><font face="Verdana">Epidemiología</font></b></p>     <p><font face="Verdana" size="2">La GF afecta desde reci&eacute;n nacidos hasta ancianos6. Hasta ahora, han sido descritos en la literatura m&eacute;dica 70 casos en la edad pedi&aacute;trica (7), dos de ellos asociado a s&iacute;ndrome nefr&oacute;tico idiop&aacute;tico (8,9), con evoluci&oacute;n satisfactoria y curaci&oacute;n total despu&eacute;s del tratamiento m&eacute;dico-quir&uacute;rgico (<a href="#f1">Fig. 1</a>).</font></p>     <p align="center"><font face="Verdana" size="2"><a name="f1"><img src="/img/revistas/ami/v24n4/revision_f1.jpg" width="375" height="340"></a></font></p>      ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">En la mayor&iacute;a de los casos publicados, la edad oscila entre 20 y 50 a&ntilde;os, con promedio de 40 a&ntilde;os6 y los varones se afectan m&aacute;s que las hembras en proporci&oacute;n 10:1 (10). Casi siempre los pacientes con GF presentan enfermedad sist&eacute;mica subyacente, de las cuales las m&aacute;s frecuentes son: diabetes y alcoholismo cr&oacute;nico (11). Este &uacute;ltimo, aumenta la incidencia de la misma, debido a inmunosupresi&oacute;n, h&aacute;bitos higi&eacute;nicos deficientes y baja condici&oacute;n socio-econ&oacute;mica (5).</font></p>     <p><font face="Verdana" size="2">La GF tiene alta probabilidad de presentarse, en pacientes inmunosuprimidos por transplantes de &oacute;rganos (12), tratamientos antineopl&aacute;sicos (13) y precede a infecci&oacute;n por HIV no diagnosticada (14). Puede observarse tambi&eacute;n, en aquellos pacientes con: hepatitis alcoh&oacute;lica (15), con calcifilaxis, por dep&oacute;sitos de calcio en vasos sangu&iacute;neos de mediano y peque&ntilde;o calibre de piel que ocasiona necrosis sist&eacute;mica (16) y con enfermedad de Crohn (17). El com&uacute;n denominador de todas estas condiciones, es disminuci&oacute;n de la inmunidad celular del hu&eacute;sped (18).</font></p>      <p>&nbsp;</p>      <p><b><font face="Verdana">Etiología</font></b></p>     <p><font face="Verdana" size="2">La GF es una infecci&oacute;n sin&eacute;rgica por bacterias. En general el origen de la infecci&oacute;n en la GF es dif&iacute;cil de identificar (19) y cuando esto ocurre, se localiza en las &aacute;reas ugenital, anorectal o cut&aacute;nea (20).</font></p>     <p><font face="Verdana" size="2">Los microorganismos son de baja virulencia (21) y en muchos casos, puede existir combinaci&oacute;n de g&eacute;rmenes aerobios con anaer&oacute;bios (22) La mayor&iacute;a de ellos son flora normal de v&iacute;as digestivas y de perin&eacute; (5). Generalmente son enterobacterias, particularmente <i>Escherichia coli</i>, Bacteroides y especies de <i>Estreptococos</i> y menos frecuente <i>Estafilococo, Peptoestreptococo, Clostridium</i> y <i>Pseudomona </i>(23). En algunos casos se han descrito tambi&eacute;n especies de <i>C&aacute;ndida</i> (24).</font></p>     <p><font face="Verdana" size="2">La crepitaci&oacute;n de la zona afectada, con o sin secreci&oacute;n f&eacute;tida, es un signo patognom&oacute;nico de infecci&oacute;n por g&eacute;rmenes anaer&oacute;bicos, por degradaci&oacute;n de hidr&oacute;geno y nitr&oacute;geno (22). La infecci&oacute;n por <i>Clostridium perfringens</i> esta presente en m&aacute;s del 90% de esos casos y debe sospecharse en pacientes con GF de etiolog&iacute;a colorectal o cuando exista necrosis muscular (22).</font></p>      <p>&nbsp;</p>      <p><b><font face="Verdana">Patogenia</font></b></p>     <p><font face="Verdana" size="2">La GF comienza con infecci&oacute;n local, que progresa y origina inflamaci&oacute;n extensa, hasta comprometer fascies profundas (25). La mayor&iacute;a de ellas, ocurre como resultado de factores predisponentes, como: a) trauma en &aacute;rea espec&iacute;fica, que facilita la entrada de microorganismos a tejidos subcut&aacute;neos; b) diseminaci&oacute;n de infecci&oacute;n de v&iacute;as urinarias o gl&aacute;ndulas periuretrales, con disecci&oacute;n a trav&eacute;s de facies, que afectan pene y escroto; y c) diseminaci&oacute;n de infecci&oacute;n desde &aacute;rea perianal o del espacio retroperitoneal, a facies peneana y escrotal (25)</font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">Por otra parte, en GF se produce endarteritis obliterativa, que causa trombosis vascular subcut&aacute;nea y necrosis tisular (26). Esta &uacute;ltima, secundaria a isquemia local y al efecto sinergista de bacterias (26). La necrosis tisular a su vez, favorece el ingreso de la flora comensal a &aacute;reas previamente est&eacute;riles (5). La combinaci&oacute;n de isquemia m&aacute;s acci&oacute;n sin&eacute;rgica de bacterias origina destrucci&oacute;n tisular (5). Hasta ahora, no est&aacute; totalmente esclarecido el mecanismo por el cual la flora uretral, rectal o cut&aacute;nea, con virulencia leve a moderada, es capaz de causar GF (27). Stone y colaboradores, han sugerido que existe interacci&oacute;n entre lesi&oacute;n inicial (traum&aacute;tica, urogenital o anorectal), respuesta inmunitaria deprimida del hu&eacute;sped y caracter&iacute;sticas del microorganismo involucrado; as&iacute;, iniciada la infecci&oacute;n, el resultado depender&aacute; de la virulencia de la bacteria en facilitar la destrucci&oacute;n tisular (27).</font></p>     <p><font face="Verdana" size="2">Ahora bien, en GF los microorganismos aer&oacute;bicos y anaer&oacute;bicos act&uacute;an sinergicamente y elaboran diferentes prote&iacute;nas y enzimas (28). Este sinergismo hace m&aacute;s compleja la respuesta inmune, con aumento de la inmunosupresi&oacute;n (28). Por otra parte, los <i>Estafilococos</i> y <i>Bacteroides</i> inhiben la fagocitosis (29), cubriendo la bacteria con fibrina, mientras que este &uacute;ltimo adem&aacute;s, disminuye la destrucci&oacute;n de otros anaer&oacute;bios (26). Los bacilos gram-negativos por su parte, producen lipopolisac&aacute;ridos, que, adem&aacute;s de asociarse con sepsis, pueden causar trombosis intravascular (22). El <i>Bacteroides spp</i> produce colagenasa, hialuronidasa y ADNasa, que destruyen col&aacute;geno, mientras que el <i>Estafilococo</i> y <i>Estreptococo</i> producen hialuronidasa (26) y el <i>Estreptococo-&szlig;</i> elabora una enzima coagulasa citratada y oxalatada que coagula el plasma (22). La combinaci&oacute;n de todos estos factores de virulencia, probablemente originan endateritis oclusiva caracter&iacute;stica de la GF. Sin embargo, a&uacute;n falta por explicar la destrucci&oacute;n tisular a lo largo de las fascies (29).</font></p>      <p>&nbsp;</p>      <p><b><font face="Verdana">Manifestaciones clínicas</font></b></p>     <p><font face="Verdana" size="2">La presentaci&oacute;n de la GF es variable y se debe sospechar en aquellos pacientes con infecci&oacute;n en &aacute;reas perineales y anorectales (22), aunque en algunos casos se puede presentar como forma inusual de sepsis (30). Generalmente comienza con dolor o prurito en pene o escroto, precedido o acompa&ntilde;ado de fiebre y escalofr&iacute;os. El edema genital, cuando se presenta, r&aacute;pidamente se extiende a estas &aacute;reas. La inflamaci&oacute;n o el enfisema subcut&aacute;neo, puede extenderse hacia pared abdominal o dirigirse hacia muslos y tejidos perianales (28). Por otro lado, los efectos sist&eacute;micos de la infecci&oacute;n, con frecuencia originan: postraci&oacute;n, nauseas, v&oacute;mitos, &iacute;leo intestinal y delirio en casos severos. Si la infecci&oacute;n contin&uacute;a su curso, y no es tratada adecuadamente, se origina gangrena de la piel del pene y del escroto, con disminuci&oacute;n del dolor por destrucci&oacute;n de los nervios sensoriales (28).</font></p>     <p><font face="Verdana" size="2">Es importante tener en cuenta, que los pacientes con GF en etapas tempranas, pueden presentar pocas manifestaciones de infecci&oacute;n, lo cual hace m&aacute;s dif&iacute;cil el diagn&oacute;stico precoz (31). En esta situaci&oacute;n, los signos y s&iacute;ntomas pueden incrementar el &iacute;ndice de sospecha de infecci&oacute;n subcut&aacute;nea necrotizante. En etapas tard&iacute;as, el paciente con frecuencia presenta, s&iacute;ntomas sist&eacute;micos de sepsis, los cuales son desproporcionados en relaci&oacute;n a la apariencia necr&oacute;tica de la piel y puede ocurrir progresi&oacute;n a falla de uno o m&uacute;ltiples &oacute;rganos, que originan la muerte (31).</font></p>      <p>&nbsp;</p>      <p><b><font face="Verdana">Diagnóstico</font></b></p>     <p><font face="Verdana" size="2">Se fundamenta en los hallazgos cl&iacute;nicos caracter&iacute;sticos. Paty y Smith (22), enfatizan la importancia de la proctoscopia y de la uretrograf&iacute;a retrograda, en la valoraci&oacute;n de todos los pacientes. La primera, revela con frecuencia, el origen de la infecci&oacute;n, as&iacute; como tambi&eacute;n el compromiso ano-rectal; informaci&oacute;n vital, para determinar si se realiza o n&oacute; colostom&iacute;a. La segunda, puede descubrir extravasaci&oacute;n urinaria masiva, que amerite vesicostom&iacute;a.</font></p>     <p><font face="Verdana" size="2">El ultrasonido de escroto (USE) tambi&eacute;n es una herramienta &uacute;til en el diagn&oacute;stico, ya que permite diferenciar la GF de la patolog&iacute;a intraescrotal, que com&uacute;nmente produce dolor, eritema y edema (32). Por su parte, la tomograf&iacute;a axial computada es &uacute;til en delimitar la extensi&oacute;n de la infecci&oacute;n y puede revelar el origen rectal o urogenital, de la misma (33), mientras que la resonancia magn&eacute;tica, permite definir los planos de las fascies involucradas y determina el punto de origen y extensi&oacute;n de la lesi&oacute;n (34). La biopsia de piel, raramente es necesaria para confirmar el diagn&oacute;stico de GF y los hallazgos histol&oacute;gicos caracter&iacute;sticos son: epidermis intacta, necrosis d&eacute;rmica y tisular subcut&aacute;nea, trombosis vascular e infiltraci&oacute;n por neutr&oacute;filos (22).</font></p>      ]]></body>
<body><![CDATA[<p>&nbsp;</p>      <p><b><font face="Verdana">Diagnóstico diferencial</font></b></p>     <p><font face="Verdana" size="2">Debe establecerse con patolog&iacute;as anorectales que producen dolor, edema y eritema, como: celulitis, hernia estrangulada, absceso escrotal, fascitis necrotizante estreptoc&oacute;cica, s&iacute;ndrome de oclusi&oacute;n vascular, gangrena piod&eacute;rmica, vasculitis al&eacute;rgica, eritema migratorio necrol&iacute;tico, necrosis warfar&iacute;nica y eritema gangrenoso por <i>Pseudomona</i> (5).</font></p>      <p>&nbsp;</p>      <p><b><font face="Verdana">Tratamiento</font></b></p>     <p><font face="Verdana" size="2">La GF en la mayor&iacute;a de los casos se presenta como emergencia quir&uacute;rgica, por lo que el tratamiento m&eacute;dico debe ser instaurado de inmediato a fin de mantener la estabilizaci&oacute;n hemodin&aacute;mica del paciente, aplicaci&oacute;n intravenosa de antibi&oacute;ticos de amplio espectro, manejo de enfermedades subyacentes (35) y simult&aacute;neamente realizarse la remoci&oacute;n extensa de los tejidos desvitalizados (36).</font></p>     <p><font face="Verdana" size="2"><i>ANTIBIÓTICOS</i></font></p>     <p><font face="Verdana" size="2">La terapia con antibi&oacute;ticos, debe ser efectiva contra todo g&eacute;rmen pat&oacute;geno, por lo que se recomienda el uso de <i>triple cura </i>con: a) cefalosporinas de tercera generaci&oacute;n o aminogluc&oacute;sidos para combatir aerobios gram-negativos; b) penicilina benzat&iacute;nica o amoxacilina para especies de <i>Estreptococo</i>; y c) metronidazol o la clindamicina contra microorganismos anaer&oacute;bios (31).</font></p>     <p><font face="Verdana" size="2"><i>    <br> TRATAMIENTO QUIRÚRGICO</i></font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">La exploraci&oacute;n quir&uacute;rgica se debe efectuar con prontitud y bajo anestesia general para realizar debridamiento radical de&aacute;reas de necrosis subcut&aacute;nea (22), a fin de interrumpir la extensi&oacute;n de la infecci&oacute;n y disminuir la toxicidad sist&eacute;mica, ya que la infecci&oacute;n puede progresar en pocas horas (21).</font></p>     <p><font face="Verdana" size="2">Para prevenir la contaminaci&oacute;n de la herida o tratar la enfermedad subyacente, se debe realizar cistostom&iacute;a o colostom&iacute;a. La primera, cuando existe extravasaci&oacute;n urinaria o inflamaci&oacute;n periuretral y la segunda, cuando exista infecci&oacute;n del esf&iacute;nter anal o perforaci&oacute;n col&oacute;nica o rectal (22).</font></p>     <p><font face="Verdana" size="2">En GF, los test&iacute;culos pocas veces se afectan, lo cual es debido a flujo sangu&iacute;neo abundante e independiente (28). El debridamiento quir&uacute;rgico puede ocasionar escroto redundante, defectos en perin&eacute; o en paredes abdominales y aunque estas heridas cicatrizan bien por segunda intenci&oacute;n, en algunos casos, la cicatrizaci&oacute;n se prolonga debido a defectos graves, que requieren cirug&iacute;a reconstructiva con injertos de piel (21,37).</font></p>     <p><font face="Verdana" size="2">Algunos autores han demostrado que con debridamiento m&iacute;nimo de la zona necr&oacute;tica, realizado tempranamente y adecuado drenaje, se obtiene iguales resultados y menor tiempo de estancia hospitalaria que cuando se realiza debridaci&oacute;n extensa (38).</font></p>      <p><font face="Verdana" size="2"><i>    <br> MIEL Y AGENTES QUÍMICOS</i></font></p>      <p><font face="Verdana" size="2">Algunos investigadores, han reconocido el valor de la miel no procesada para acelerar la cicatrizaci&oacute;n, ya que pose&eacute; pH bajo 3,6, contiene enzimas que digieren tejidos necr&oacute;ticos y sustancias antimicrobianas inespec&iacute;ficas y es eficaz contra muchos g&eacute;rmenes (5). Adem&aacute;s, estimula el crecimiento y la multiplicaci&oacute;n de las c&eacute;lulas epiteliales en los bordes de la herida, lo cual se evidencia en la primera semana de su aplicaci&oacute;n local (28). Por otra parte, otros autores recomiendan utilizar hipoclorito de sodio (soluci&oacute;n Dakins) (22) o per&oacute;xido de hidr&oacute;geno (28).</font></p>      <p>    <br> <font face="Verdana" size="2"><i>OXÍGENO HIPERBÁRICO</i></font></p>      <p><font face="Verdana" size="2">Los beneficios de la terapia con ox&iacute;geno hiperb&aacute;rico (OH) incluyen: aporte adecuado de oxigeno para funci&oacute;n &oacute;ptima de neutr&oacute;filos fagoc&iacute;ticos, inhibici&oacute;n del crecimiento de anaerobios por hiperoxigenaci&oacute;n tisular, incremento de la proliferaci&oacute;n de los fibroblastos y de la angiog&eacute;nesis, reducci&oacute;n del edema por vasoconstricci&oacute;n, aumento del transporte intracelular de antibi&oacute;ticos e incremento de radicales libres de ox&iacute;geno (5). En general, la terapia con OH se puede obtener aumento importante en la oxigenaci&oacute;n tisular, tanto en tejidos sanos como en los infectados (39).</font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana" size="2">Por otra parte, los tejidos hipreoxigenados alrededor del &aacute;rea infectada pueden prevenir la extensi&oacute;n de los microorganismos invasores (39). Sin embargo, la terapia con OH no debe ser reemplazada por el tratamiento quir&uacute;rgico definitivo. Esta opci&oacute;n, debe reservarse para aquellos pacientes t&oacute;xicos, que a pesar de hab&eacute;rsele realizado debridamiento extenso, no tienen mejor&iacute;a y en los que se sospecha infecci&oacute;n anaer&oacute;bica por hallazgos cl&iacute;nicos o microbiol&oacute;gicos (22). Las contraindicaciones absolutas del OH son: enfermedad viral activa, neumot&oacute;rax y tratamiento con antineopl&aacute;sicos (40).</font></p>      <p>    <br> <font face="Verdana" size="2"><i>MEDIDAS SUPLEMENTARIAS</i></font></p>      <p><font face="Verdana" size="2">Los pacientes con GF pueden ameritar transfusi&oacute;n de sangre fresca o factores de la coagulaci&oacute;n, ventilaci&oacute;n asistida y suficiente aporte de l&iacute;quidos y electrolitos suficientes tanto en el per&iacute;odo previo a la intervenci&oacute;n quir&uacute;rgica como en el post-operatorio. Despu&eacute;s de la limpieza quir&uacute;rgica, se les debe aplicar nutrici&oacute;n parenteral o enteral adecuada (5), con el fin de mantener balance nitrogenado positivo, que le garantice optima cicatrizaci&oacute;n de las heridas (28).</font></p>      <p>&nbsp;</p>      <p><b><font face="Verdana">Pronóstico</font></b></p>     <p><font face="Verdana" size="2">La morbilidad se refleja en la duraci&oacute;n de la estancia hospitalaria, la cual puede variar de 2 a 280 d&iacute;as (41). La tasa de mortalidad fluct&uacute;a de 3 a 45% (29) aunque puede elevarse hasta 67%,42 debido a la naturaleza agresiva de la infecci&oacute;n (31).</font></p>     <p><font face="Verdana" size="2">En cuanto a la mortalidad, existen factores que pueden incrementarla, como: vejez; tratamiento inadecuado; presencia de <i>shock</i>, sepsis o compromiso testicular, bajo hematocrito, retenci&oacute;n azoada, hipoalbuminemia e inestabilidad hemodin&aacute;mica (21,43-45). Las causas de muerte m&aacute;s frecuentes son: sepsis severa, coagulopat&iacute;a, insuficiencia renal aguda, cetoacidosis diab&eacute;tica y falla multiorg&aacute;nica (11,46,47). El compromiso local se asocia con baja tasa de mortalidad comparado con el de &aacute;reas m&aacute;s extensas, por lo que pacientes con m&aacute;s de 5% de superficie corporal lesionada, tienen m&aacute;s riesgo de morir (48). La colostom&iacute;a precoz por su parte, reduce la tasa de mortalidad en pacientes con infecci&oacute;n anorectal severa (49).</font></p>     <p><font face="Verdana" size="2">La GF es una entidad cl&iacute;nica grave, pero el pron&oacute;stico es bueno cuando el tratamiento se instaura en la fase inicial de la enfermedad (50). El diagn&oacute;stico oportuno de GF y el debridamiento quir&uacute;rgico precoz, son medidas fundamentales para detener la progresi&oacute;n r&aacute;pida de la infecci&oacute;n (51,52). Korkut y colaboradores en un estudio realizado en 45 pacientes con GF, demostraron que el intervalo de tiempo desde el inicio de la sintomatolog&iacute;a hasta el momento de la limpieza quir&uacute;rgica, determina papel importante en el pron&oacute;stico (52).</font></p>     <p><font face="Verdana" size="2">La GF debe sospecharse, en todo paciente con fascitis necrotizante de perin&eacute; o &aacute;reas vecinas, con infecci&oacute;n confirmada o no y sin discriminaci&oacute;n de sexo ni edad. El diagn&oacute;stico temprano, es importante para el pron&oacute;stico. El &eacute;xito del tratamiento radica en instaurar terapia con antibi&oacute;ticos de amplio espectro, realizar debridamiento quir&uacute;rgico precoz y ubicar al paciente si lo amerita en unidad de cuidados intensivos. A pesar del tratamiento oportuno, la mortalidad a&uacute;n permanece elevada, especialmente en pacientes ancianos y con enfermedad subyacente y la aplicaci&oacute;n de OH y miel no procesada, aunado al tratamiento convencional, puede ser &uacute;til en algunos casos.</font></p>      ]]></body>
<body><![CDATA[<p>&nbsp;</p>      <p><b><font face="Verdana">Bibliografía</font></b></p>     <!-- ref --><p><font face="Verdana" size="2">1. Litchfield WR. The bittersweet demise of Herod the Great. J R Soc Med 1998; 91: 283-4.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606576&pid=S0212-7199200700040000900001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">2.Nathan B.  Fournier's gangrene: a historical vignette. J Can Surg 1998; 41: 72 (Letter; comment).</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606577&pid=S0212-7199200700040000900002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">3. Baurienne H. Sur une plaie contuse qui s'est terminee par le sphacele de le scrotum. J Med Chir Pharm 1764; 20: 251-6. Citado por Smith GL y cols. 5.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606578&pid=S0212-7199200700040000900003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">4. Fournier JA. Gangrene foudroyante de la verge. Medecin Pratique 1883; 4: 589-97. Citado por Vick R y cols. 30.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606579&pid=S0212-7199200700040000900004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">5. Smith GL, Bunker CB, Dinneen MD. Fournier's gangrene. Br J Urol 1998; 81: 347-55.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606580&pid=S0212-7199200700040000900005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">6. Lamb RC, Juler GL. Fournier's gangrene of the scrotum. A poorly defined syndrome or a misnomer ? Arch Surg 1983; 118: 38-40.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606581&pid=S0212-7199200700040000900006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">7. Urdaneta-Carruyo E , M&eacute;ndez-Parra A, Urdaneta-Contreras AV. Gangrena de Fournier en la edad pedi&aacute;trica. Memorias LI Congreso Nacional de Puericultura y Pediatr&iacute;a. Puerto La Cruz, Venezuela, 2005.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606582&pid=S0212-7199200700040000900007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">8. 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Valencia, Venezuela, 1999.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606584&pid=S0212-7199200700040000900009&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="Verdana" size="2">10. Stephens BJ, Lathrop JC, Rice WT, Gruenberg JC. Fournier's gangrene: historic (1764-1978) versus contemporary (1979-1988) differences in etiology and clinical importance. Am Surg 1993; 59: 149-54.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606585&pid=S0212-7199200700040000900010&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">11. Baskin LS, Carroll PR, Cattolica EV, Mc Aninch JW. Necrotizing soft tissue infections of the perineum and genitalia. Bacteriology, treatment and risk assessment. Br J Urol 1990; 65: 524-9.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606586&pid=S0212-7199200700040000900011&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">12. Walther PJ, Andriani RT, Maggio MI, Carson CC III. Fournier's gangrene: a complication of penile prosthetic implantation in a renal transplant patient. 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Merino E, Boix V, Portilla J, Reus S, Priego M. Fournier's gangrene in HIV-infected patients. Eur J Clin Microbiol Infect Dis 2001; 20: 910-3.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606589&pid=S0212-7199200700040000900014&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">15. Zenda T, Kobayashi T, Miyamoto S, Okada T. Severe alcoholic hepatitis accompanied by Fournier's gangrene. 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Surg Clin North Am 1994; 74: 1339-52.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606596&pid=S0212-7199200700040000900021&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">22. Paty R, Smith AD. Gangrene and Fournier's gangrene. Urol Clin North Am 1992; 19: 149-62.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606597&pid=S0212-7199200700040000900022&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> <font face="Verdana" size="2">23. Basoglu M, Gul O, Yildirgan I, Balik AA, Ozbey I, Oren D. Fournier's gangrene. Review of fifteen cases. 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Dis Colon Rectum 2003; 45: 649-52.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=606627&pid=S0212-7199200700040000900052&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><p> &nbsp;</p>     <p> &nbsp;</p>     <p> <font face="Verdana" size="2"><a href="#top"><img border="0" src="/img/revistas/ami/v24n4/seta.gif" width="15" height="17"></a><b><a name="back"></a>Dirección para correspondencia</b>:<i> </i>    <br> Eliexer Urdaneta Carruyo.     <br> Unidad de Nefrología Pediátrica y Metabolismo Mineral.     <br> Hospital Universitario de Los Andes.     ]]></body>
<body><![CDATA[<br> Apartado postal 813 Mérida. Venezuela 5101.     <br> e-mail: <a href="mailto:eliexeru@gmail.com">eliexeru@gmail.com</a></font></p>     <p> <font face="Verdana" size="2">Trabajo aceptado: 15 de noviembre de 2006</font></p>      ]]></body><back>
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