<?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>1646-706X</journal-id>
<journal-title><![CDATA[Angiologia e Cirurgia Vascular]]></journal-title>
<abbrev-journal-title><![CDATA[Angiol Cir Vasc]]></abbrev-journal-title>
<issn>1646-706X</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Angiologia e Cirurgia Vascular]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1646-706X2011000400002</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Angiossomas do pé e do tornozelo: implicações no tratamento da isquémia crítica dos membros inferiores]]></article-title>
<article-title xml:lang="en"><![CDATA[Angiosomes of the foot and ankle and its importance in the treatment of critical limb ischaemia of the lower limb]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[Emanuel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital do Divino Espírito Santo, EPE Serviço de Angiologia e Cirurgia Vascular ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<volume>7</volume>
<numero>4</numero>
<fpage>204</fpage>
<lpage>207</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-706X2011000400002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-706X2011000400002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-706X2011000400002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[A revascularização, por cirurgia convencional ou por procedimentos endovasculares, nos doentes com isquémia crítica dos membros inferiores tem um papel importante na prevenção da perda de membro, na melhoria da qualidade de vida e sobrevida destes doentes. No entanto, até 15% das revascularizações de úlceras isquémicas do pé, apesar do sucesso técnico, podem falhar a cicatrização e conduzir o doente a uma amputação major[1-3]. Isto poderá acontecer por uma revascularização local inadequada, com conexões vasculares inadequadas entre a artéria revascularizada e a área isquémica local. O conhecimento e aplicação do conceito dos angiossomas do pé e tornozelo permitem ao cirurgião vascular um melhor planeamento, adequação de meios terapêuticos e tratamento da isquémia crítica dos membros inferiores.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Revascularization by conventional surgery or endovascular procedures in patients with critical lower limb ischaemia plays an important role in preventing the loss of limb, in improving the quality of life and survival of these patients. However, up to 15% of the revascularization of ischemic ulcers of the foot, despite the technical success, may fail to heal and lead to a major amputation. This may be due to an inadequate local revascularization, with inadequate vascular connections between the revascularized artery and the ischemic site. The knowledge and application of the concept of the foot and ankle angiossomes allow the vascular surgeon to better plan, adequate therapeutic means and treat critical lower limb ischaemia.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[isquemia crítica]]></kwd>
<kwd lng="pt"><![CDATA[revascularização do membro inferior]]></kwd>
<kwd lng="pt"><![CDATA[angiossomas do pé e tornozelo]]></kwd>
<kwd lng="en"><![CDATA[critical limb ischaemia]]></kwd>
<kwd lng="en"><![CDATA[revascularizacion lower limb]]></kwd>
<kwd lng="en"><![CDATA[angiossomes of the foot and ankle]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ 
	    <p><font face="verdana" size="2"><b>Angiossomas do p&eacute;
	e do tornozelo &#150; implica&ccedil;&otilde;es
no tratamento da isqu&eacute;mia cr&iacute;tica dos membros inferiores</b></font></p>

    <p>&nbsp;</p>
    <p><font face="verdana" size="2"><b>Emanuel Dias</b>*</font></p>
    <p><font face="verdana" size="2">Hospital do Divino Esp&iacute;rito Santo, EPE</font></p>
    <p><font face="verdana" size="2">Servi&ccedil;o de Angiologia e Cirurgia Vascular</font></p>

	    <p><font face="verdana" size="2">(Directora: Dra. Isabel C&aacute;ssio)</font></p>
    <p>&nbsp;</p>
    <p><font face="verdana" size="2">* 6&ordm; Ano do Internato M&eacute;dico
  de Angiologia e Cirurgia Vascular</font></p>
	    <p>&nbsp;</p>
	    ]]></body>
<body><![CDATA[<p><font face="verdana" size="2">|<b>RESUMO</b>|</font></p>
    <p><font face="verdana" size="2">A revasculariza&ccedil;&atilde;o, por cirurgia convencional ou por procedimentos endovasculares, nos doentes com isqu&eacute;mia cr&iacute;tica dos membros inferiores tem um papel importante na preven&ccedil;&atilde;o da perda de membro, na melhoria da qualidade de vida e sobrevida destes doentes.</font></p>
    <p><font face="verdana" size="2">No entanto, at&eacute; 15% das revasculariza&ccedil;&otilde;es de &uacute;lceras isqu&eacute;micas do p&eacute;, apesar do sucesso t&eacute;cnico, podem falhar a cicatriza&ccedil;&atilde;o e conduzir o doente a uma amputa&ccedil;&atilde;o major<sup>&#91;1&#45;3&#93;</sup>. Isto poder&aacute; acontecer por uma revasculariza&ccedil;&atilde;o local inadequada, com conex&otilde;es vasculares inadequadas entre a art&eacute;ria revascularizada e a &aacute;rea isqu&eacute;mica local.</font></p>
    <p><font face="verdana" size="2">O conhecimento e aplica&ccedil;&atilde;o do conceito dos angiossomas do p&eacute; e tornozelo permitem ao cirurgi&atilde;o vascular um melhor planeamento, adequa&ccedil;&atilde;o de meios terap&ecirc;uticos e tratamento da isqu&eacute;mia cr&iacute;tica dos membros inferiores.</font></p>
    <p><font face="verdana" size="2"><b>Palavras&#45;chave:</b> isquemia cr&iacute;tica, revasculariza&ccedil;&atilde;o do membro inferior, angiossomas do p&eacute; e tornozelo </font></p>
    <p>&nbsp;</p>
	    <p><font face="verdana" size="2"><b>Angiosomes of the foot and ankle and its importance in the treatment of critical limb ischaemia
	  of the lower limb</b></font></p>
	    <p><font face="verdana" size="2">|<b>ABSTRACT</b>|</font></p>
    <p><font face="verdana" size="2">Revascularization by conventional surgery or endovascular procedures in patients with critical lower limb ischaemia plays an important role in preventing the loss of limb, in improving the quality of life and survival of these patients. However, up to 15% of the revascularization of ischemic ulcers of the foot, despite the technical success, may fail to heal and lead to a major amputation. This may be due to an inadequate local revascularization, with inadequate vascular connections between the revascularized artery and the ischemic site. The knowledge and application of the concept of the foot and ankle angiossomes allow the vascular surgeon to better plan, adequate therapeutic means and treat critical lower limb ischaemia.</font></p>

	    <p><font face="verdana" size="2"><b>Key words</b>: critical limb ischaemia, revascularizacion lower limb, angiossomes of the foot
and ankle </font></p>

    ]]></body>
<body><![CDATA[<p>&nbsp;</p>

    <p><font face="verdana" size="2"><b>ANGIOSSOMAS DO P&Eacute; E TORNOZELO</b></font></p>
    <p><font face="verdana" size="2">Um angiossoma &eacute; definido como uma unidade anat&oacute;mica de tecido (constitu&iacute;do por pele, tecido subcut&acirc;neo, fascia, m&uacute;sculo e osso) nutrido por uma art&eacute;ria. <i>Taylor</i><sup>&#91;4&#93;</sup> descreveu 40 angiossomas no corpo humano. Destes, seis est&atilde;o localizados no p&eacute; e tornozelo | FIGURA 1 | e adstritos &agrave;s 3 principais art&eacute;rias da perna: a art&eacute;ria tibial posterior, a art&eacute;ria tibial anterior e a art&eacute;ria peroneal.</font></p>
    <p>&nbsp;</p>
    <p><font face="verdana" size="2">| <b>FIGURA 1</b> | Angiosossomos do p&eacute; e tornozelo</font></p>
    <p><img src="/img/revistas/ang/v7n4/7n4a02f1.jpg"></p>
    
<p>&nbsp;</p>
    <p><font face="verdana" size="2">A art&eacute;ria tibial posterior supre tr&ecirc;s territ&oacute;rios/angiossomas:</font></p>
    <p><font face="verdana" size="2">&gt; o calcanhar medial e plantar via seu ramo calc&acirc;neo;</font></p>

    <p><font face="verdana" size="2">&gt; a parte medial da regi&atilde;o plantar via art&eacute;ria plantar medial:</font></p>

    ]]></body>
<body><![CDATA[<p><font face="verdana" size="2">&gt; a parte plantar lateral do p&eacute; e plantar distal pela art&eacute;ria plantar lateral.</font></p>

    <p><font face="verdana" size="2">A art&eacute;ria peroneal supre 2 angiossomas:</font></p>
    <p><font face="verdana" size="2">&gt; parte anterior e superior do tornozelo lateral pelo seu ramo perfurante anterior;</font></p>

    <p><font face="verdana" size="2">&gt; zona do calcanhar plantar e lateral via ramo para o calc&acirc;neo.</font></p>

    <p><font face="verdana" size="2">A art&eacute;ria tibial anterior supre o tornozelo anterior e depois torna&#45;se na art&eacute;ria pediosa que nutre o angiossoma do dorso do p&eacute;<sup>&#91;5&#93;</sup>.</font></p>

    <p>&nbsp;</p>
	    <p><font face="verdana" size="2"><b>AVALIA&Ccedil;&Atilde;O CL&Iacute;NICA DAS CONEX&Otilde;ES ARTERIO&#45;ARTERIAL</b></font></p>
    <p><font face="verdana" size="2">A vasculariza&ccedil;&atilde;o do p&eacute; e do tornozelo pode ser encarada como uma de um &oacute;rg&atilde;o de circula&ccedil;&atilde;o terminal, tendo as suas 3 art&eacute;rias principais numerosas conex&otilde;es directas arterio&#45;arterial, que permitem o desenvolvimento de rotas alternativas de fluxo sangu&iacute;neo, se as rotas directas
(i.e. angiossoma) estiverem comprometidas.</font></p>

	    <p><font face="verdana" size="2">O uso do doppler de onda cont&iacute;nua nas localiza&ccedil;&otilde;es espec&iacute;ficas onde estas conex&otilde;es ocorrem permite a avalia&ccedil;&atilde;o precisa do fluxo sangu&iacute;neo atrav&eacute;s do p&eacute;, interpretando o som da sonda doppler (monotonal, bitonal e tritonal) e a direc&ccedil;&atilde;o do fluxo sangu&iacute;neo (anter&oacute;gado ou retr&oacute;gado), pela aplica&ccedil;&atilde;o da oclus&atilde;o selectiva com o indicador do operador proximal ou distalmente &agrave; &aacute;rea a ser investigada | FIGURA 2 |. Dessa maneira, pode&#45;se seleccionar a art&eacute;ria a ser revascularizada (com o melhor outflow para o p&eacute;). Incis&otilde;es, desbridamentos, amputa&ccedil;&otilde;es e encerramentos de feridas podem ser feitos sem comprometer o fluxo sangu&iacute;neo de um p&eacute; em risco<sup>&#91;6&#93;</sup>.</font></p>
	    <p>&nbsp;</p>
	    ]]></body>
<body><![CDATA[<p><font face="verdana" size="2">| <b>FIGURA 2</b> | Conex&otilde;es arterio&#45;arterial por doppler: ocluindo as art&eacute;rias proximal ou distalmente ao sinal arterial, &eacute; poss&iacute;vel perceber a direc&ccedil;&atilde;o do fluxo arterial.</font></p>
    <p><img src="/img/revistas/ang/v7n4/7n4a02f2.jpg"></p>
    
<p>&nbsp;</p>
	    <p><font face="verdana" size="2"><b>AVALIA&Ccedil;&Atilde;O DA &Uacute;LCERA ISQU&Eacute;MICA</b></font></p>
    <p><font face="verdana" size="2">A avalia&ccedil;&atilde;o cl&iacute;nica actual da necessidade de revasculariza&ccedil;&atilde;o de uma ferida ou &uacute;lcera do p&eacute; e tornozelo (<i>Rutherford V</i> e <i>VI</i>), principalmente em doentes diab&eacute;ticos, deve ser sempre iniciada com a avalia&ccedil;&atilde;o da pr&oacute;pria ferida e do status vascular da extremidade em quest&atilde;o, incluindo a examina&ccedil;&atilde;o dos pulsos e estudos do laborat&oacute;rio vascular para tentar perceber do potencial de cicatriza&ccedil;&atilde;o da &uacute;lcera. Se esta avalia&ccedil;&atilde;o indicar um baixo potencial de cicatriza&ccedil;&atilde;o que se manifesta por uma aus&ecirc;ncia de pulsos distais, &iacute;ndice tornozelo bra&ccedil;o inferior a 0.3, ondas doppler segmentares monof&aacute;sicas, tens&atilde;o de oxig&eacute;nio transcut&acirc;nea (Tco2) inferior a 25 mmHg de valor absoluto ou o &iacute;ndice de Tco2 inferior a 0.4, ent&atilde;o a revasculariza&ccedil;&atilde;o deve ser executada<sup>&#91;7&#93;</sup>. Evid&ecirc;ncias recentes, mostram que a press&atilde;o de perfus&atilde;o cut&acirc;nea (SPP) &agrave; volta da ferida isqu&eacute;mica como sendo o m&eacute;todo com melhor predi&ccedil;&atilde;o de cicatriza&ccedil;&atilde;o, principalmente em doentes hemodialisados<sup>&#91;8&#93;</sup>.</font></p>

    <p><font face="verdana" size="2">As &uacute;nicas feridas a serem desbridadas antes de uma revasculariza&ccedil;&atilde;o s&atilde;o aquelas com gangrena h&uacute;mida ou com fasce&iacute;te necrotizante. Isto porque foi demonstrado que a Tco2 ao redor da &uacute;lcera isqu&eacute;mica aumenta muito lentamente ap&oacute;s um bypass vascular e atinge o m&aacute;ximo apenas 2 a 4 semanas ap&oacute;s a revasculariza&ccedil;&atilde;o. Assim, uma tentativa de encerrar prematuramente uma ferida ou executar uma amputa&ccedil;&atilde;o definitiva pode ter consequ&ecirc;ncias desastrosas.</font></p>

	    <p><font face="verdana" size="2">Ap&oacute;s a revasculariza&ccedil;&atilde;o a &uacute;lcera deve ser tratada com o ambiente t&oacute;pico apropriado e a reconstru&ccedil;&atilde;o dos tecidos moles deve ser adiada at&eacute; n&atilde;o existirem mais sinais de infec&ccedil;&atilde;o e a ferida exibir sinais de cicatriza&ccedil;&atilde;o (tecido de granula&ccedil;&atilde;o). Este hiato temporal (habitualmente 2&#45;4 semanas) permitir&aacute;, como anteriormente dito, a optimiza&ccedil;&atilde;o do ganho local da revasculariza&ccedil;&atilde;o. Posteriormente o doente deve voltar ao hospital para um desbridamento final e um encerramento apropriado da &uacute;lcera, que pode tomar a forma de um encerramento secund&aacute;rio ap&oacute;s desbridamento adicional, enxerto cut&acirc;neo, cobertura da ferida com rota&ccedil;&atilde;o de flap muscular ou amputa&ccedil;&atilde;o minor definitiva.</font></p>

	    <p>&nbsp;</p>
	    <p><font face="verdana" size="2"><b>USANDO O CONCEITO DE ANGIOSSOMAS PARA FAZER INCIS&Otilde;ES E AMPUTA&Ccedil;&Otilde;ES</b></FONT></p>
    <p><font face="verdana" size="2">Existem 4 factores gerais a ter em conta aquando da realiza&ccedil;&atilde;o de uma incis&atilde;o no p&eacute;/tornozelo: exposi&ccedil;&atilde;o adequada, fluxo sangu&iacute;neo adequado em ambos os lados da incis&atilde;o para optimiza&ccedil;&atilde;o da cicatriza&ccedil;&atilde;o, preserva&ccedil;&atilde;o de nervos sensitivos e motores, e n&atilde;o optar por uma incis&atilde;o perpendicular a uma articula&ccedil;&atilde;o (risco de contractura cicatricial).</font></p>

	    ]]></body>
<body><![CDATA[<p><font face="verdana" size="2">Se existe um bom fluxo da art&eacute;ria (presen&ccedil;a de pulso ou fluxo trif&aacute;sico) que supre cada angiossoma, a incis&atilde;o mais segura a fazer &eacute; ao longo do bordo entre dois angiossomas, porque cada lado da incis&atilde;o tem o m&aacute;ximo de fluxo sangu&iacute;neo. No entanto, quando o sinal da art&eacute;ria de um de dois angiossomas adjacentes est&aacute; ausente, o angiossoma isqu&eacute;mico afectado depende dos angiossomas lim&iacute;trofes para fluxo sangu&iacute;neo via vasos colaterais. Estes, podem levar cerca de 2 a 4 semanas a se desenvolverem depois de um dado angiossoma ficar isqu&eacute;mico. Assim, incis&otilde;es realizadas demasiado cedo, antes do desenvolvimento de vias alternativas, podem levar a fraca cicatriza&ccedil;&atilde;o, necrose e gangrena.</font></p>

	    <p><font face="verdana" size="2">Quando existe compromisso de sangue e est&aacute; a ser planeada uma amputa&ccedil;&atilde;o do antep&eacute; ou de <i>Lisfranc</i>, &eacute; importante ter em conta qual o fluxo sangu&iacute;neo restante e mapear completamente todas as conex&otilde;es arterio&#45;arteriais. Se a circula&ccedil;&atilde;o dorsal do p&eacute; depende da circula&ccedil;&atilde;o plantar ou vice&#45;versa, as conex&otilde;es entre elas n&atilde;o podem ser perturbadas, ou seja, a conex&atilde;o entre a art&eacute;ria pediosa e a art&eacute;ria plantar lateral no 1&ordm; espa&ccedil;o inter metac&aacute;rpico proximal deve ser mantida. Assim, para preservar esta conex&atilde;o durante uma amputa&ccedil;&atilde;o transmetat&aacute;rsica ou de <i>Lisfranc</i>, os 4 metatarsos laterais s&atilde;o removidos lateralmente e o 1&ordm; metatarso removido medialmente<sup>&#91;5&#93;</sup>.</font></p>

    <p>&nbsp;</p>
	    <p><font face="verdana" size="2"><b>ANGIOSSOMAS E TRATAMENTO ENDOVASCULAR DA ISQU&Eacute;MIA CR&Iacute;TICA DOS MEMBROS INFERIORES</b></font></p>
    <p><font face="verdana" size="2">Com o seu recente desenvolvimento t&eacute;cnico, o tratamento endovascular da isqu&eacute;mia cr&iacute;tica dos membros inferiores tem passado a ser o de primeira linha nestes doentes, pelos seus resultados favor&aacute;veis, com excelente taxa de sucesso inicial, baixa incid&ecirc;ncia de complica&ccedil;&otilde;es e alta taxa de salvamento de membro<sup>&#91;9&#93;</sup>.</font></p>

    <p><font face="verdana" size="2">O tratamento actual da isqu&eacute;mia cr&iacute;tica dos membros inferiores deve ir mais al&eacute;m, com integra&ccedil;&atilde;o do conceito dos angiossomas do p&eacute; e tornozelo<sup>&#91;10&#45;12&#93;</sup>. Ser&aacute; uma oportunidade para uma terap&ecirc;utica dirigida, revascularizando a art&eacute;ria relacionada com a &uacute;lcera isqu&eacute;mica.</font></p>

    <p><font face="verdana" size="2">Compete ao cirurgi&atilde;o vascular atual adquirir compet&ecirc;ncias nesta &aacute;rea da revasculariza&ccedil;&atilde;o endovascular infra&#45;poplitea. Mas, ao mesmo tempo, compreender a necessidade de optimiza&ccedil;&atilde;o do tratamento local da ferida adquirindo compet&ecirc;ncias na &aacute;rea de cuidados t&oacute;picos da ferida, enxertos cut&acirc;neos ou musculares, amputa&ccedil;&otilde;es funcionais que preservem a biomec&acirc;nica do p&eacute;; ou integrar grupos multidisciplinares de tratamento de isqu&eacute;mia cr&iacute;tica e/ou p&eacute; diab&eacute;tico com cirurgi&otilde;es pl&aacute;sticos e ortopedistas dedicados ao p&eacute; e tornozelo. S&oacute; neste contexto abrangente de cuidados &eacute; que parece fadado o sucesso global do tratamento da isqu&eacute;mia cr&iacute;tica dos membros inferiores.</font></p>

	    <p>&nbsp;</p>

	    <p><font face="verdana" size="2"><b>BIBLIOGRAFIA</b></font></p>

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J Vasc Surg 2000;31:1110&#150;1118.</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=000068&pid=S1646-706X201100040000200007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="verdana" size="2"><sup>&#91;8&#93;</sup> TSUJI Y, TERASHI H, KITANO I, TAHARA S: Importance of skin perfusion pressure (SPP) in the treatment of critical limb ischemia (CLI). Wounds 2008; 20: 95&#150;100.</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=000069&pid=S1646-706X201100040000200008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="verdana" size="2"><sup>&#91;9&#93;</sup> ADAM DJ, BEARD JD, CLEVELAND T, BELL J, BRADBURY AW:
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