<?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>1646-2122</journal-id>
<journal-title><![CDATA[Revista Portuguesa de Ortopedia e Traumatologia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Port. Ortop. Traum.]]></abbrev-journal-title>
<issn>1646-2122</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Ortopedia e Traumatologia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1646-21222014000300002</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Neuropatia compressiva do nervo supraescapular]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[Nuno Vieira]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sevivas]]></surname>
<given-names><![CDATA[Nuno]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Manuel Vieira da]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital de Braga Serviço de Ortopedia e Traumatologia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<volume>22</volume>
<numero>3</numero>
<fpage>249</fpage>
<lpage>264</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-21222014000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-21222014000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-21222014000300002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Introdução: a neuropatia compressiva do nervo supraescapular foi descrita pela primeira vez em 1952 mas só recentemente tem sido mais compreendida e diagnosticada. A sua etiologia nem sempre é clara e o seu diagnóstico ainda não está bem estabelecido. O tratamento é controverso, especialmente a opção pela libertação artroscópica. Esta técnica tem sido cada vez mais utilizada mas, apesar dos bons resultados relatados, não encontramos na literatura qualquer análise sistematizada dos resultados clínicos desta técnica. Pretendeu-se com este trabalho efetuar uma revisão teórica do tema e uma análise detalhada dos resultados do tratamento artroscópico, procurando as indicações mais apropriadas para esta técnica. Material e Métodos: pesquisa efetuada em 6 bases de dados disponíveis na Internet utilizando as expressões: “suprascapular nerve”, “arthroscopic”, “release” e “decompression”. Efetuada revisão sistemática da literatura encontrada e uma síntese narrativa. Síntese de dados e conclusão. A neuropatia compressiva do nervo supraescapular é atualmente uma entidade nosológica bem estabelecida e cada vez melhor compreendida. Integra o diagnóstico diferencial da patologia da cintura escapular, sobretudo em doentes jovens, atletas ou no contexto de roturas da coifa. O tratamento cirúrgico está indicado na falência do tratamento conservador sendo a libertação artroscópica do nervo uma técnica em expansão. Está indicada em doentes com omalgia posterior, diminuição da força do supraespinhoso e infraespinhoso ou apenas do infraespinhoso, com ou sem alterações electromiográficas. O resultado das pequenas series publicadas até ao momento é encorajador pois parece proporcionar resultados clínicos positivos consistentes, constituindo um tratamento válido para a neuropatia compressiva do nervo supraescapular.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction: suprascapular neuropathy was first described in 1952, but only recently has been better understood and diagnosed. Etiology is not always clear and the diagnosis is not yet well established. Treatment is controversial, especially the option for arthroscopic release. This technique has been increasingly used but, despite the good results reported in the literature, we did not find any systematic analysis of the clinical results of this technique. The aim of this work was to make review of the subject and a detailed analysis of the results of arthroscopic treatment, looking for the most appropriate indications for this technique. Material and Methods: search was conducted in 6 databases available on the Internet using the keywords "suprascapular nerve", "arthroscopic ", "release" and "decompression". A systematic review of the literature was performed and found a narrative synthesis. Data Synthesis and Conclusions: suprascapular neuropathy is now a well-established and increasingly better understood pathology. It is very important in the differential diagnosis of the shoulder pathology, especially in younger patients, athletes or in the context of cuff tears. Surgical treatment is indicated when the conservative treatment fails and, in that case, the arthroscopic release is an expanding option. It is indicated in patients with posterior shoulder pain, decreased strength of the supraspinatus and/or infraspinatus, with or without electromyographic changes. Results are encouraging up to date only but small series are published. It appears to provide consistent positive clinical results becoming a valid treatment for suprascapular neuropathy.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Nervo]]></kwd>
<kwd lng="pt"><![CDATA[supraescapular]]></kwd>
<kwd lng="pt"><![CDATA[goteira espinoglenoideia]]></kwd>
<kwd lng="pt"><![CDATA[eletromiografia]]></kwd>
<kwd lng="pt"><![CDATA[descompressão artroscópica]]></kwd>
<kwd lng="en"><![CDATA[nerve]]></kwd>
<kwd lng="en"><![CDATA[Suprascapular]]></kwd>
<kwd lng="en"><![CDATA[spinoglenoid notch]]></kwd>
<kwd lng="en"><![CDATA[electromyography]]></kwd>
<kwd lng="en"><![CDATA[arthroscopic decompression]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><b><font face="Verdana" size="2">ARTIGO DE REVISÃO</font></b></p>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="4">Neuropatia compressiva do nervo supraescapular</font></b></p>    <p>&nbsp;</p>    <p><font face="Verdana" size="2"><b>Nuno Vieira Ferreira<sup>I</sup></b>; <b>Nuno Sevivas<sup>I</sup></b>; <b>Manuel Vieira da Silva<sup>I</sup></b></font></p>    <p><font face="Verdana" size="2">I. Serviço de Ortopedia e Traumatologia do Hospital de Braga. Portugal.<br /></font></p>    <p>&nbsp;</p>    <p><font face="Verdana" size="2"><a name="topc"></a><a href="#c">Endereço para correspondência</a></font></p>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">RESUMO</font></b></p><font face="verdana" size="2">    ]]></body>
<body><![CDATA[<p>Introdu&ccedil;&atilde;o: a neuropatia compressiva do nervo supraescapular foi descrita pela primeira vez em 1952 mas s&oacute; recentemente tem sido mais compreendida e diagnosticada.<br />A sua etiologia nem sempre &eacute; clara e o seu diagn&oacute;stico ainda n&atilde;o est&aacute; bem estabelecido. O tratamento &eacute; controverso, especialmente a op&ccedil;&atilde;o pela liberta&ccedil;&atilde;o artrosc&oacute;pica.<br />Esta t&eacute;cnica tem sido cada vez mais utilizada mas, apesar dos bons resultados relatados, n&atilde;o encontramos na literatura qualquer an&aacute;lise sistematizada dos resultados cl&iacute;nicos desta t&eacute;cnica.<br />Pretendeu-se com este trabalho efetuar uma revis&atilde;o te&oacute;rica do tema e uma an&aacute;lise detalhada dos resultados do tratamento artrosc&oacute;pico, procurando as indica&ccedil;&otilde;es mais apropriadas para esta t&eacute;cnica.<br />Material e M&eacute;todos: pesquisa efetuada em 6 bases de dados dispon&iacute;veis na Internet utilizando as express&otilde;es: &ldquo;suprascapular nerve&rdquo;, &ldquo;arthroscopic&rdquo;, &ldquo;release&rdquo; e &ldquo;decompression&rdquo;. Efetuada revis&atilde;o sistem&aacute;tica da literatura encontrada e uma s&iacute;ntese narrativa.<br />S&iacute;ntese de dados e conclus&atilde;o. A neuropatia compressiva do nervo supraescapular &eacute; atualmente uma entidade nosol&oacute;gica bem estabelecida e cada vez melhor compreendida. Integra o diagn&oacute;stico diferencial da patologia da cintura escapular, sobretudo em doentes jovens, atletas ou no contexto de roturas da coifa.<br />O tratamento cir&uacute;rgico est&aacute; indicado na fal&ecirc;ncia do tratamento conservador sendo a liberta&ccedil;&atilde;o artrosc&oacute;pica do nervo uma t&eacute;cnica em expans&atilde;o. Est&aacute; indicada em doentes com omalgia posterior, diminui&ccedil;&atilde;o da for&ccedil;a do supraespinhoso e infraespinhoso ou apenas do infraespinhoso, com ou sem altera&ccedil;&otilde;es electromiogr&aacute;ficas.<br />O resultado das pequenas series publicadas at&eacute; ao momento &eacute; encorajador pois parece proporcionar resultados cl&iacute;nicos positivos consistentes, constituindo um tratamento v&aacute;lido para a neuropatia compressiva do nervo supraescapular.</p></font>    <p><font face="verdana" size="2"><b>Palavras chave</b>: Nervo, supraescapular, goteira espinoglenoideia, eletromiografia, descompressão artroscópica. </font></p>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">ABSTRACT</font></b></p><font face="verdana" size="2">    <p>Introduction: suprascapular neuropathy was first described in 1952, but only recently has been better understood and diagnosed.<br />Etiology is not always clear and the diagnosis is not yet well established. Treatment is controversial, especially the option for arthroscopic release.<br />This technique has been increasingly used but, despite the good results reported in the literature, we did not find any systematic analysis of the clinical results of this technique.<br />The aim of this work was to make review of the subject and a detailed analysis of the results of arthroscopic treatment, looking for the most appropriate indications for this technique.<br />Material and Methods: search was conducted in 6 databases available on the Internet using the keywords "suprascapular nerve", "arthroscopic ", "release" and "decompression". A systematic review of the literature was performed and found a narrative synthesis.<br />Data Synthesis and Conclusions: suprascapular neuropathy is now a well-established and increasingly better understood pathology. It is very important in the differential diagnosis of the shoulder pathology, especially in younger patients, athletes or in the context of cuff tears.<br />Surgical treatment is indicated when the conservative treatment fails and, in that case, the arthroscopic release is an expanding option. It is indicated in patients with posterior shoulder pain, decreased strength of the supraspinatus and/or infraspinatus, with or without electromyographic changes.<br />Results are encouraging up to date only but small series are published. It appears to provide consistent positive clinical results becoming a valid treatment for suprascapular neuropathy.</p></font>    <p><font face="verdana" size="2"><b>Key words</b>: nerve, Suprascapular, spinoglenoid notch, electromyography, arthroscopic decompression. </font></p>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">INTRODUÇÃO</font></b></p><font face="verdana" size="2">    <p>A neuropatia do nervo supraescapular resulta de uma les&atilde;o tipicamente por compress&atilde;o ou tra&ccedil;&atilde;o.</p>
    <p>A primeira descri&ccedil;&atilde;o deste fen&oacute;meno de compress&atilde;o surgiu na literatura francesa por Thomas quando em 1936 descreveu &ldquo;a paralisia do m&uacute;sculo supraespinhoso&rdquo; <sup>1</sup>. Em 1952, Schilf publica e documenta a primeira evid&ecirc;ncia de compress&atilde;o do nervo supraescapular <sup>2</sup>. A entidade cl&iacute;nica foi mais claramente definida por Thompson e Kopell em 1959, descrevendo a compress&atilde;o na goteira supraescapular <sup>3</sup>. Aiello et al. apresentaram em 1982 a distin&ccedil;&atilde;o entre a compress&atilde;o na goteira supraescapular e a compress&atilde;o na chanfradura espinoglenoideia <sup>4</sup>.</p>
    ]]></body>
<body><![CDATA[<p>Apesar destes estudos, esta patologia foi durante o s&eacute;culo XX considerada com uma causa muito rara de dor e disfun&ccedil;&atilde;o do ombro e por isso admitida apenas como diagn&oacute;stico de exclus&atilde;o <sup>5</sup>.</p>
    <p>Segundo uma meta-an&aacute;lise de Zehetgruber, entre 1959 e 2001 s&oacute; foram publicados 88 casos de compress&atilde;o do nervo supraescapular <sup>6</sup>.</p>
    <p>Na &uacute;ltima d&eacute;cada assistimos a um crescente interesse por esta patologia com o aparecimento de mais publica&ccedil;&otilde;es acerca da anatomia, clinica, diagn&oacute;stico e tratamento desta patologia.</p>
    <p>&nbsp;O maior conhecimento desta neuropatia aumentou o seu diagn&oacute;stico. Enquanto Zehetgruber aponta para uma preval&ecirc;ncia de 1-2% <sup>6</sup>, Lafosse em 2007 reporta uma preval&ecirc;ncia de 7%-10% <sup>7</sup>. Warner em 2009 publicou uma incid&ecirc;ncia de 4% na sua pr&aacute;tica cl&iacute;nica (40 doentes diagnosticados em 937 observados por omalgia) <sup>8</sup>. V&aacute;rios estudos reportam uma elevada incid&ecirc;ncia entre atletas com atividades acima do n&iacute;vel da cabe&ccedil;a (e.g. jogadores de voleibol) que pode chegar aos 33% <sup>9</sup>. Recentemente surgiram estudos onde esta neuropatia aparece associada a roturas maci&ccedil;as da coifa com uma incid&ecirc;ncia que varia entre os 2% e os 100% <sup>10-13</sup>.</p>
    <p>As op&ccedil;&otilde;es de tratamento t&ecirc;m vindo a evoluir especialmente na &uacute;ltima d&eacute;cada mas n&atilde;o s&atilde;o ainda consensuais. A op&ccedil;&atilde;o pelo tratamento cir&uacute;rgico &eacute; bastante controversa, especialmente a op&ccedil;&atilde;o pela liberta&ccedil;&atilde;o por via artrosc&oacute;pica.</p>
    <p>Esta t&eacute;cnica tem sido cada vez mais utilizada mas, apesar dos bons resultados relatados <sup>7</sup>, n&atilde;o encontramos na literatura qualquer an&aacute;lise sistematizada dos seus resultados cl&iacute;nicos.</p>
    <p>Pretendeu-se com este trabalho efetuar uma revis&atilde;o te&oacute;rica do tema e uma an&aacute;lise detalhada dos resultados do tratamento artrosc&oacute;pico, procurando as indica&ccedil;&otilde;es mais apropriadas para esta t&eacute;cnica.</p>
    <p>Para isso foi efectuada uma pesquisa em 6 bases de dados dispon&iacute;veis na Internet (PubMed, Science Citation Index, Embase, Google scholar, Cochrane review, ResearchGate) utilizando as express&otilde;es: &ldquo;suprascapular nerve&rdquo;, &ldquo;arthroscopic&rdquo;, &ldquo;release&rdquo; e &ldquo;decompression&rdquo;. De todas as publica&ccedil;&otilde;es encontradas, mais de metade foram notas t&eacute;cnicas, cerca de 25% foram casos cl&iacute;nicos e apenas cerca de 21% diziam respeito a estudos cl&iacute;nicos. Foi sobre estes que incidiu a an&aacute;lise efectuada.</p></font>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">ANATOMIA</font></b></p>    ]]></body>
<body><![CDATA[<p><b><font face="Verdana" size="2">O Nervo Supraescapular</font></b></p><font face="verdana" size="2">    <p>O Nervo supraescapular &eacute; um dos ramos supraclaviculares do plexo braquial. Mais concretamente, &eacute; o primeiro ramo do tronco superior do plexo braquial e &eacute; formado pelos ramos ventrais do quinto e sexto nervos cervicais (C5 e C6), podendo ocasionalmente receber contributo da raiz de C4.</p>
    <p>Inicialmente caminha posterior &agrave; clav&iacute;cula e depois no bordo superior da omoplata, atravessando a goteira supraescapular inferior ao ligamento transverso da omoplata.</p>
    <p>Neste trajecto &eacute; acompanhado pela art&eacute;ria supraescapular que na goteira supraescapular se afasta ligeiramente passando sobre o ligamento transverso.</p>
    <p>Ap&oacute;s abandonar a goteira, o nervo caminha medial ao tub&eacute;rculo supraglenoideu e posterior ao rebordo da glenoide. De seguida contorna a espinha da omoplata e, em conjunto com a art&eacute;ria, atravessam a chanfradura espinoglenoideia, inferior ao ligamento transverso inferior da omoplata ou ligamento espinoglenoideu<sup>14-16</sup> dirigindo-se para o m&uacute;sculo infraespinhoso (<a name="topf1"></a><a href="#f1">Figura 1</a>).</p>    <p>&nbsp;</p><a name="f1"></a>     <p>    <center><img src="/img/revistas/rpot/v22n3/22n3a02f1.jpg" width="387" height="357" border="0" /></center></p>    
<p>&nbsp;</p>
    <p>O nervo supraescapular &eacute; classicamente considerado um nervo motor, fornecendo 2 ramos ao m&uacute;sculo supraescapular ap&oacute;s atravessar a goteira supraescapular e 2 a 4 ramos terminais ao m&uacute;sculo infraespinhoso depois de contornar a chanfradura espinoglenoideia.</p>
    ]]></body>
<body><![CDATA[<p>Al&eacute;m desta fun&ccedil;&atilde;o motora, estudos em cad&aacute;ver<sup>14, 17, 18</sup> indicam que ele tem ramos sonsoriais para as articula&ccedil;&otilde;es gleno-umeral e acr&oacute;mio-clavicular, para o ligamento coraco-acromial e para a pele. Brown considera que poder&aacute; ser respons&aacute;vel por cerca de 70% da sensa&ccedil;&atilde;o da pele do ombro<sup>19</sup>. Estes dados encontram suporte clinico nos estudos de Ritchie e de Matsumoto onde &eacute; reportada menor dor apos cirurgia do ombro quando &eacute; efectuado o bloqueio do nervo supra-escapular<sup>20, 21</sup>. Tamb&eacute;m Vorster<sup>22</sup> confirmou a presen&ccedil;a destes ramos sensoriais nos seus estudos em cad&aacute;ver.&nbsp;</p></font>    <p><b><font face="Verdana" size="2">A Goteira Supraescapular e o Ligamento Transverso da Omoplata</font></b></p><font face="verdana" size="2">    <p>A chanfradura supraescapular &eacute; o leito sobre o qual o nervo supraescapular cruza o bordo superior da omoplata. Em conjunto com o ligamento transverso da omoplata, formam uma goteira que embora oferecendo prote&ccedil;&atilde;o ao nervo supraescapular, pode ser causa de les&atilde;o tanto por funcionar como um restritor aos seus movimentos como por ser a pr&oacute;pria causa da compress&atilde;o.</p>
    <p>De acordo com Rengachary em 1979, h&aacute; seis tipos b&aacute;sicos de goteira supraescapular<sup>17</sup>: Tipo I (8%): Goteira ausente, em que o bordo superior forma uma depress&atilde;o ampla desde o &acirc;ngulo medial at&eacute; &agrave; base da coracoide; Tipo II (31%): Goteira em forma de V largo ocupando o ter&ccedil;o m&eacute;dio do bordo superior; Tipo III (48%): Goteira em forma de U com margens quase paralelas; Tipo IV (3%): Goteira em forma de V e muito pequeno em que um sulco raso &eacute; frequentemente formado para o nervo supraescapular adjacente &agrave; goteira; Tipo V (6%): Goteira m&iacute;nima e em forma de U com o ligamento parcialmente ossificado; Tipo VI (4%): O ligamento que forma o teto da goteira est&aacute; completamente ossificado.</p>
    <p>Segundo Lafosse e seus colaboradores, o risco de compress&atilde;o &eacute; tanto maior quanto mais pequena a goteira supraescapular e mais espesso o ligamento transverso da omoplata<sup>23</sup>.</p>
    <p>O ligamento transverso da omoplata pode tornar-se mais espesso se houver hipertrofia, fibrose ou ossifica&ccedil;&atilde;o. Al&eacute;m dos fen&oacute;menos que conduzem a um conflito de espa&ccedil;o, pode causar ainda irrita&ccedil;&atilde;o do nervo Supraescapular atrav&eacute;s de um mecanismo de cinto durante certos movimentos do membro superior.&nbsp;</p></font>    <p><b><font face="Verdana" size="2">A Chanfradura Espinoglenoideia e o Ligamento Espinoglenoideu</font></b></p><font face="verdana" size="2">    <p>O ligamento espinoglenoideu, tamb&eacute;m conhecido por ligamento transverso inferior da omoplata, &eacute; o local mais frequente de compress&atilde;o do nervo supraescapular<sup>14</sup>. Ele origina-se na espinha da omoplata e insere-se no rebordo superior do colo da glenoide segundo uma estrutura bilaminar. Cummins, em 1998, classificou este ligamento em 2 tipos: tipo I, uma fina banda de tecido e o tipo II, um ligamento bem formado<sup>15</sup>.</p>
    <p>Mais recentemente Plancher divulgou os seus estudos em 58 cad&aacute;veres nos quais identificou o ligamento espinoglenoideu em 100% dos casos. Segundo o seu artigo de 2005, o ligamento &eacute; de tamanho vari&aacute;vel (comprimento m&eacute;dio de 15 mm) mas apresenta estrutura histol&oacute;gica constante de feixes de colag&eacute;nio bem organizados<sup>24</sup>.</p>
    <p>Pela sua inser&ccedil;&atilde;o na capsula articular gleno-umeral posterior, o ligamento espinoglenoideu &eacute; uma estrutura din&acirc;mica. Em certas posi&ccedil;&otilde;es do membro superior com a adu&ccedil;&atilde;o e rota&ccedil;&atilde;o interna, este ligamento torna-se tenso devido ao tensionamento da capsula posterior e pode comprimir o nervo<sup>25</sup>.</p>
    ]]></body>
<body><![CDATA[<p>A chanfradura espinoglenoideia &eacute; contornada pelo nervo supraescapular entre a imin&ecirc;ncia dos ramos para os m&uacute;sculos supra e infraespinhoso. Segundo o estudo em cad&aacute;ver efectuado por Warner<sup>14</sup> em casos de rotura maci&ccedil;a da coifa com retrac&ccedil;&atilde;o superior a 3 cm existe uma tens&atilde;o elevada nos ramos motores do nervo supraescapular, podendo condicionar compress&atilde;o deste sobre a chanfradura. Outros autores apresentaram resultados que apontam para que roturas com mais de 1 cm de retra&ccedil;&atilde;o j&aacute; poder&atilde;o condicionar tensionamento excessivo no nervo supraescapular<sup>26</sup>.</p></font>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">ETIOLOGIA</font></b></p><font face="verdana" size="2">    <p>A neuropatia compressiva do nervo supraescapular pode ser prim&aacute;ria (ou idiop&aacute;tica) ou secund&aacute;ria<sup>23</sup>.</p></font>    <p><b><font face="Verdana" size="2">Neuropatia compressiva do nervo supraescapular primária (ou idiopática)</font></b></p><font face="verdana" size="2">    <p>A neuropatia compressiva do nervo supraescapular prim&aacute;ria (ou idiop&aacute;tica) deve-se essencialmente a um estiramento ou compress&atilde;o do nervo por trauma e/ou micro-trauma repetitivo associado a certos movimentos dos membros superiores e/ou regi&atilde;o cervical. Em atletas que praticam desportos com o membro superior elevado, pode haver uma compress&atilde;o din&acirc;mica devida ao aumento de press&atilde;o sobre o nervo gerada pelo tensionamento do ligamento espinoglenoideu quando o ombro se encontra numa posi&ccedil;&atilde;o de arremesso acima da cabe&ccedil;a<sup>23, 25</sup>.</p>
    <p>A compress&atilde;o pode tamb&eacute;m acontecer na goteira supraescapular ou na chanfradura espinoglenoideia por um mecanismo direto, como seja a presen&ccedil;a de um tumor dos tecidos moles, um tumor &oacute;sseo, uma malforma&ccedil;&atilde;o vascular, ou mesmo um quisto secund&aacute;rio a les&atilde;o capsular ou do labrum (<a name="topf2"></a><a href="#f2">Figuras 2</a> e <a href="/img/revistas/rpot/v22n3/22n3a02f3.jpg">3</a>).</p>    
<p>&nbsp;</p><a name="f2"></a>     <p>    <center><img src="/img/revistas/rpot/v22n3/22n3a02f2.jpg" width="392" height="402" border="0" /></center></p>    
]]></body>
<body><![CDATA[<p>&nbsp;</p>    <p>    <center><a href="/img/revistas/rpot/v22n3/22n3a02f3.jpg">Figura 3</a></center></p>    
<p>&nbsp;</p>
    <p>Em doentes com uma estenose da goteira supraescapular ou da chanfradura espinoglenoideia por calcifica&ccedil;&atilde;o ou hipertrofia ligamentar existe uma maior predisposi&ccedil;&atilde;o para uma compress&atilde;o do nervo a estes n&iacute;veis.</p>
    <p>A compress&atilde;o do nervo supraescapular pode ainda acontecer por outros motivos: pelos ligamentos coracoescapulares anteriores, pelo bordo hipertrofiado do m&uacute;sculo infraescapular, pelo m&uacute;sculo omo-hioideu, por luxa&ccedil;&atilde;o gleno-umeral, em casos de neurite v&iacute;rica, por les&otilde;es penetrantes do ombro e pela abordagem cir&uacute;rgica posterior da omoplata<sup>23, 27, 28</sup>(<a href="/img/revistas/rpot/v22n3/22n3a02f4.jpg">Figura 4</a>).</p>    
<p>&nbsp;</p>    <p>    <center><a href="/img/revistas/rpot/v22n3/22n3a02f4.jpg">Figura 4</a></center></p>    
<p>&nbsp;</p></font>    ]]></body>
<body><![CDATA[<p><b><font face="Verdana" size="2">Neuropatia compressiva do nervo supraescapular secundária</font></b></p><font face="verdana" size="2">    <p>A neuropatia compressiva do nervo supraescapular secund&aacute;ria est&aacute; associada a roturas maci&ccedil;as da coifa. A retra&ccedil;&atilde;o dos tend&otilde;es da coifa no contexto de rotura maci&ccedil;a podem condicionar tra&ccedil;&atilde;o e consequente estiramento do nervo tanto na goteira supraescapular como na chanfradura espinoglenoideia.</p>
    <p>V&aacute;rios estudos encontraram correla&ccedil;&atilde;o entre a presen&ccedil;a de neuropatia do nervo supraescapular e a presen&ccedil;a de rotura maci&ccedil;a da coifa<sup>12, 14, 29, 30</sup>. Por outro lado, acredita-se que o processo de repara&ccedil;&atilde;o de rotura maci&ccedil;a, com avan&ccedil;o lateral do tend&atilde;o supraespinhoso, possa condicionar les&atilde;o do nervo estiramento. H&aacute; autores que reportam um risco aumentado de les&atilde;o associado a um avan&ccedil;o lateral do tend&atilde;o superior a 3 cm ou at&eacute; menos<sup>14, 26</sup>.</p>
    <p>Albritton et al. demonstrou em 2003 que aumentando a retrac&ccedil;&atilde;o do tend&atilde;o supraespinhoso, reduzia o angulo entre o nervo supraescapular e a sua primeira raiz motora, com um aumento da tens&atilde;o no nervo ao n&iacute;vel da goteira supraescapular<sup>30</sup>.</p></font>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">DIAGNÓSTICO</font></b></p>    <p><b><font face="Verdana" size="2">História clínica</font></b></p><font face="verdana" size="2">    <p>O doente com les&atilde;o do nervo supraescapular tipicamente apresenta uma dor permanente de aparecimento insidioso, localizada &agrave; regi&atilde;o superior, posterosuperior e/ou posterolateral do ombro. O agravamento nocturno da dor &eacute; uma queixa vari&aacute;vel.</p>
    <p>&Eacute; frequente existir queixas associadas de fadiga e fraqueza muscular sobretudo em atividades com o membro superior acima da cabe&ccedil;a.</p>
    <p>Por vezes &eacute; poss&iacute;vel identificar uma hist&oacute;ria de trauma ou atividades repetitivas com o membro superior acima da cabe&ccedil;a<sup>31</sup>.</p></font>    ]]></body>
<body><![CDATA[<p><b><font face="Verdana" size="2">Exame físico</font></b></p><font face="verdana" size="2">    <p>O exame f&iacute;sico inclui sempre a avalia&ccedil;&atilde;o da coluna cervical e dos dois ombros, pesquisando altera&ccedil;&otilde;es da sensibilidade da face posterosuperior do ombro, da atrofia muscular da face posterior do ombro e for&ccedil;a muscular sobretudo dos rotadores externos.</p>
    <p>Alguns doentes podem ser praticamente assintom&aacute;ticos, apresentando apenas altera&ccedil;&otilde;es ao exame f&iacute;sico compat&iacute;veis com atrofia muscular do supraespinhoso e/ou infraespinhoso.</p>
    <p>O exame f&iacute;sico dos doentes com les&atilde;o do nervo na goteira supraescapular apresenta tipicamente altera&ccedil;&atilde;o da sensibilidade &agrave; palpa&ccedil;&atilde;o da regi&atilde;o posterior &agrave; clav&iacute;cula, entre esta e a espinha da omoplata, diminui&ccedil;&atilde;o da for&ccedil;a de abdu&ccedil;&atilde;o e rota&ccedil;&atilde;o externa contra resist&ecirc;ncia e atrofia dos m&uacute;sculos supra e/ou infraespinhosos</p>
    <p>Quando a les&atilde;o &eacute; na chanfradura espinoglenoideia, pode haver hipersensibilidade &agrave; profundidade e na regi&atilde;o posterior &agrave; articula&ccedil;&atilde;o acr&oacute;mio-clavicular, dor com a adu&ccedil;&atilde;o for&ccedil;ada (<em>cross-arm test</em> positivo pelo tensionamento do ligamento espino-glenoideu)<sup>25</sup>, atrofia do m&uacute;sculo infraespinhoso (poupando o supraespinhoso) e diminui&ccedil;&atilde;o da for&ccedil;a &agrave; rota&ccedil;&atilde;o externa. No entanto, quando h&aacute; muito tempo de evolu&ccedil;&atilde;o, o m&uacute;sculo pequeno redondo pode compensar a perda do infraespinhoso e manter uma for&ccedil;a de rota&ccedil;&atilde;o externa quase normal.</p>
    <p>O teste descrito por Lafosse<sup>23</sup> em que h&aacute; aumento da dor posterior quando &eacute; efectuada a rota&ccedil;&atilde;o da cabe&ccedil;a do doente para o lado contra-lateral associada a trac&ccedil;&atilde;o simult&acirc;nea do ombro em estudo pode ser utilizado para pesquisar patologia associada ao nervo supraescapular.</p></font>    <p><b><font face="Verdana" size="2">Exames auxiliares de diagnóstico</font></b></p><font face="verdana" size="2">    <p>Doentes com queixas e exame objetivo sugestivo de patologia do nervo supraescapular devem ser avaliados radiograficamente (face em dupla obliquidade e perfil em Y da omoplata) procurando a presen&ccedil;a de displasia &oacute;ssea, ossifica&ccedil;&atilde;o, forma&ccedil;&atilde;o de calo &oacute;sseo exuberante, tumor &oacute;sseo e varia&ccedil;&otilde;es &oacute;sseas da goteira supraescapular.</p>
    <p>Pode tamb&eacute;m ser solicitado uma incid&ecirc;ncia especial: a incid&ecirc;ncia para a goteira supraescapular (feixe dirigido 15&ordm; a 30&ordm; em dire&ccedil;&atilde;o cef&aacute;lica) que permite avaliar as varia&ccedil;&otilde;es &oacute;sseas da goteira ou a incid&ecirc;ncia de Stryker para a goteira que permite uma melhor visualiza&ccedil;&atilde;o desta.</p>
    <p>A tomografia computorizada (TC) define melhor a exist&ecirc;ncia de fraturas bem como as caracter&iacute;sticas anat&oacute;micas. &Eacute; o exame de elei&ccedil;&atilde;o para documentar a ossifica&ccedil;&atilde;o do ligamento transverso da omoplata<sup>5</sup>.</p>
    ]]></body>
<body><![CDATA[<p>A resson&acirc;ncia magn&eacute;tica (RM) &eacute; o exame ideal para visualizar o trajeto do nervo bem como identificar massas ou outras les&otilde;es ocupando espa&ccedil;o<sup>32-34</sup>. Permite excelente avalia&ccedil;&atilde;o do labrum, quistos associados, tend&otilde;es da coifa dos rotadores e qualidade dos m&uacute;sculos, incluindo a infiltra&ccedil;&atilde;o adiposa e a atrofia<sup>35</sup> (<a name="topf5"></a><a href="#f5">Figura 5</a>).</p>    <p>&nbsp;</p><a name="f5"></a>     <p>    <center><img src="/img/revistas/rpot/v22n3/22n3a02f5.jpg" width="392" height="392" border="0" /></center></p>    
<p>&nbsp;</p>
    <p>A electromiografia e o estudo da velocidade de condu&ccedil;&atilde;o do nervo s&atilde;o instrumentos fundamentais no estudo da patologia do nervo supra-escapular23. Apesar da sensibilidade e especificidade do exame ser ainda um assunto em debate, &eacute; profundamente dependente do tipo de les&atilde;o em causa mas tamb&eacute;m da experi&ecirc;ncia do executante<sup>5, 23, 36</sup>. A electromiografia est&aacute; indicada na presen&ccedil;a de: dor no ombro continua, persistente, sem outra explica&ccedil;&atilde;o; atrofia e fraqueza dos m&uacute;sculos supraespinhoso e infraespinhoso sem evid&ecirc;ncia de rotura da coifa ou infiltra&ccedil;&atilde;o adiposa; edema dos m&uacute;sculos observado em RM sem evid&ecirc;ncia de rotura da coifa<sup>5, 37</sup>. Est&aacute; indicada ainda na presen&ccedil;a de quisto associado a rotura maci&ccedil;a da coifa com retra&ccedil;&atilde;o franca ou a les&atilde;o labral para excluir concomitante les&atilde;o do nervo supraescapular<sup>10</sup>.</p>
    <p>A electromiografia pode mostrar desnerva&ccedil;&atilde;o dos m&uacute;sculos supra e infraespinhoso ou infraespinhoso, com fibrila&ccedil;&otilde;es e ondas pontiagudas. O estudo da condu&ccedil;&atilde;o pode mostrar valores de lat&ecirc;ncia desde o ponto Erb at&eacute; aos m&uacute;sculos ou entre os m&uacute;sculos supra e infraespinhoso.</p>
    <p>Tal como no estudo de outras neuropatias compressivas, a electromiografia e os estudos de condu&ccedil;&atilde;o apresentam alguma variabilidade. Por exemplo, no s&iacute;ndroma do t&uacute;nel c&aacute;rpico, a sensibilidade varia de 74% a 91%<sup>36, 38</sup>. Na neuropatia compressiva do nervo supraescapular, h&aacute; estudos que reportam sensibilidade de 91% em doentes com diminui&ccedil;&atilde;o da for&ccedil;a de rota&ccedil;&atilde;o externa<sup>39</sup>. Ainda assim, n&atilde;o &eacute; necess&aacute;rio uma electromiografia positiva para efetuar o diagn&oacute;stico de neuropatia compressiva do nervo supraescapular<sup>23</sup>.</p>
    <p>Em doentes com electromiografia negativa, pode ser efectuada a injec&ccedil;&atilde;o sob controlo fluorosc&oacute;pico de anest&eacute;sico local na goteira supra-escapular<sup>5, 12</sup> cujo al&iacute;vio imediato da dor constitui um sinal positivo para o diagn&oacute;stico de neuropatia compressiva do nervo supraescapular.</p></font>    <p>&nbsp;</p>    ]]></body>
<body><![CDATA[<p><b><font face="Verdana" size="2">TRATAMENTO</font></b></p>    <p><b><font face="Verdana" size="2">Tratamento Conservador</font></b></p><font face="verdana" size="2">    <p>O tratamento inicial para a maior parte dos doentes com neuropatia compressiva do nervo supraescapular isolada (sem associa&ccedil;&atilde;o com rotura maci&ccedil;a da coifa ou quisto paralabral) assenta em modifica&ccedil;&atilde;o da actividade, anti-inflamat&oacute;rios n&atilde;o esteroides e fisioterapia<sup>40, 41</sup>. O programa de fisioterapia deve ser focado na mobiliza&ccedil;&atilde;o do ombro e no refor&ccedil;o muscular com especial aten&ccedil;&atilde;o aos estabilizadores do ombro.</p>
    <p>Black e Lombardo publicaram 4 casos de doentes com neuropatia do supraescapular afectando o infraespinhoso que melhoraram apos 6 a 12 meses de tratamento<sup>42</sup>. Drez descreveu os casos de outros 4 doentes com neuropatia isolada do supraescapular que melhoraram apos tratamento conservador e recomenda 6 a 8 meses de tratamento<sup>43</sup>. Martin publicou uma serie de 15 doentes com neuropatia compressiva do nervo supraescapular isolada tratados conservadoramente durante quase 4 anos: 5 obtiveram excelente resultado, 7 bom resultado enquanto apenas 3 necessitaram de cirurgia. Martin recomenda por isso tratamento conservador em todos os doentes excepto em casos de les&otilde;es ocupando espa&ccedil;o ou dor persistente<sup>40</sup>.</p>
    <p>Apesar de a maior parte dos autores recomendarem o tratamento conservador na maior parte dos doentes, a taxa de sucesso n&atilde;o est&aacute; determinada. De facto alguns autores recomendam uma abordagem cir&uacute;rgica mais precoce para prevenir maior agravamento da deteriora&ccedil;&atilde;o do m&uacute;sculo<sup>44</sup>. N&atilde;o h&aacute; contudo neste momento evid&ecirc;ncia de que o adiamento da abordagem cir&uacute;rgica esteja relacionado com les&atilde;o irrevers&iacute;vel do nervo<sup>5</sup>.</p></font>    <p><b><font face="Verdana" size="2">Tratamento Cirúrgico</font></b></p><font face="verdana" size="2">    <p>A decis&atilde;o por um tratamento cir&uacute;rgico deve ser resultado de uma avalia&ccedil;&atilde;o ponderada de cada doente e baseada na observa&ccedil;&atilde;o clinica, radiol&oacute;gica e electromiogr&aacute;fica, na causa e localiza&ccedil;&atilde;o da les&atilde;o.</p>
    <p>Na presen&ccedil;a de uma neuropatia isolada do nervo supraescapular (sem patologia concomitante) que n&atilde;o respondeu ao tratamento conservador, deve ser ponderada a descompress&atilde;o cir&uacute;rgica<sup>7, 44-47</sup>. Se a neuropatia &eacute; diagnosticada em conjunto com uma rotura da coifa ou com uma les&atilde;o labral com quisto associado, est&aacute; indicado o tratamento cir&uacute;rgico para tratamento da patologia de base que est&aacute; na origem da les&atilde;o neurol&oacute;gica. Alguns autores defendem a descompress&atilde;o do nervo na goteira supraescapular em associa&ccedil;&atilde;o com o tratamento da rotura da coifa bem como a descompress&atilde;o do quisto durante a repara&ccedil;&atilde;o do labrum<sup>7, 48-50</sup>. Outros defendem que ap&oacute;s tratar a patologia de base ocorre a resolu&ccedil;&atilde;o da neuropatia do nervo supraescapular<sup>11, 51, 52</sup>.&nbsp;</p></font>    <p><b><font face="Verdana" size="2">Tratamento cirúrgico na chanfradura espinoglenoideia</font></b></p><font face="verdana" size="2">    <p>A neuropatia do nervo supraescapular na chanfradura espinoglenoideia &eacute; tipicamente secund&aacute;ria a compress&atilde;o do nervo por les&atilde;o ocupando espa&ccedil;o. A maioria destas les&otilde;es s&atilde;o quistos, normalmente secund&aacute;rios a les&otilde;es do labrum, lipomas ou outros tumores benignos da regi&atilde;o<sup>27, 53</sup>.</p>
    ]]></body>
<body><![CDATA[<p>Quando o respons&aacute;vel pela compress&atilde;o &eacute; um tumor, o tratamento cir&uacute;rgico est&aacute; indicado, sendo normalmente necess&aacute;rio recorrer a uma abordagem aberta para a ressec&ccedil;&atilde;o da les&atilde;o.</p>
    <p>Quando o motivo da compress&atilde;o &eacute; um quisto, a quest&atilde;o &eacute; bem mais controversa. Alguns autores propuseram a aspira&ccedil;&atilde;o do quisto guiada por ecografia mas os resultados foram inconsistentes. V&aacute;rios estudos apontam para um bom al&iacute;vio da dor<sup>32, 54-56</sup> mas com taxas de recorr&ecirc;ncia elevadas (at&eacute; 75%)<sup>57, 58</sup>. Pare ser uma t&eacute;cnica segura mas com alta taxa de recorr&ecirc;ncia provavelmente devido ao facto de n&atilde;o abordar a patologia de base.</p>
    <p>O tratamento cir&uacute;rgico pode consistir numa descompress&atilde;o cir&uacute;rgica do quisto por via aberta ou artrosc&oacute;pica, associada ou n&atilde;o &agrave; repara&ccedil;&atilde;o do labrum, ou pode consistir apenas numa repara&ccedil;&atilde;o isolada do labrum. A descompress&atilde;o aberta pode ser efectuada por via de abordagem posterior do ombro. Contudo, esta via oferece uma visualiza&ccedil;&atilde;o limitada do labrum e de outras poss&iacute;veis les&otilde;es intra-articulares associadas<sup>46</sup>. A via artrosc&oacute;pica &eacute; mais vers&aacute;til permitindo a descompress&atilde;o do quisto bem com a visualiza&ccedil;&atilde;o e tratamento das les&otilde;es intra-articulares. Diversos autores como Westerheide, Chen e Lichtenberg defendem um risco de recorr&ecirc;ncia menor na via artrosc&oacute;pica<sup>46, 57&nbsp;</sup>bem como uma melhoria funcional mais consistente ap&oacute;s a descompress&atilde;o do quisto e repara&ccedil;&atilde;o do labrum<sup>59, 60</sup>.</p>
    <p>Mais recentemente alguns autores defendem que &eacute; suficiente a repara&ccedil;&atilde;o da les&atilde;o labral, sem descompress&atilde;o do quisto, no tratamento da neuropatia compressiva do nervo supraescapular na chanfradura espinoglenoideia<sup>52, 61</sup>. Schroder reportou desaparecimento do quisto na RMN p&oacute;s-operat&oacute;ria em 88% dos 44 doentes tratados deste modo<sup>51</sup>.</p>
    <p>Se a compress&atilde;o for devida a um espessamento do ligamento espinoglenoideu, o tratamento de elei&ccedil;&atilde;o &eacute; a descompress&atilde;o cir&uacute;rgica do ligamento que pode ser efectuada por via aberta ou, preferencialmente, por via artrosc&oacute;pica, com as vantagens associadas &agrave; t&eacute;cnica artrosc&oacute;pica.&nbsp;</p></font>    <p><b><font face="Verdana" size="2">Tratamento cirúrgico na goteira supraescapular</font></b></p><font face="verdana" size="2">    <p>A compress&atilde;o do nervo supraescapular na goteira supraescapular &eacute; causada mais frequentemente por movimentos repetidos do ombro, conflito de espa&ccedil;o em consequ&ecirc;ncia de varia&ccedil;&otilde;es anat&oacute;micas locais ou de les&otilde;es que ocupam espa&ccedil;o ou ainda tra&ccedil;&atilde;o secund&aacute;ria a rotura da coifa.</p>
    <p>Na maior parte dos casos, o tratamento consiste na liberta&ccedil;&atilde;o do ligamento transverso da omoplata com ex&eacute;rese ou descompress&atilde;o de qualquer massa existente. Esta liberta&ccedil;&atilde;o pode ser efetuada atrav&eacute;s de abordagem aberta ou artrosc&oacute;pica.</p>
    <p>Classicamente utilizada, a via aberta &eacute; efetuada atrav&eacute;s de uma incis&atilde;o transversal, proximal &agrave; espinha da omoplata ou, em alternativa, de uma incis&atilde;o vertical 4.5 cm medial ao bordo posterolateral do acr&oacute;mio. O m&uacute;sculo trap&eacute;zio &eacute; levantado da espinha da omoplata e o m&uacute;sculo supraespinhoso afastado. &Eacute; ent&atilde;o efetuada a dissec&ccedil;&atilde;o at&eacute; ao limite posterior do bordo superior da omoplata onde &eacute; identificado e seccionado o ligamento transverso da omoplata protegendo o nervo supraescapular e com o cuidado de n&atilde;o lesar o feixe vascular que passa sobre ele<sup>62</sup>. Pode ser necess&aacute;rio efetuar uma goteiroplastia para descomprimir uma goteira restritiva ossificada.</p>
    <p>Est&atilde;o reportados pouco mais de 250 casos de liberta&ccedil;&atilde;o aberta do nervo supraescapular na goteira supraescapular<sup>5</sup>. As complica&ccedil;&otilde;es verificadas foram poucas e a maioria dos doentes tiveram evolu&ccedil;&atilde;o clinica favor&aacute;vel apesar de raramente haver revers&atilde;o da atrofia muscular<sup>47</sup>.</p>
    ]]></body>
<body><![CDATA[<p>A primeira visualiza&ccedil;&atilde;o endosc&oacute;pica do nervo supraescapular foi descrita por Krishnan em 2004<sup>63</sup> num estudo efectuado em cad&aacute;ver. Bhatia em 2006 prop&ocirc;s uma abordagem totalmente artrosc&oacute;pica para a descompress&atilde;o do nervo supraescapular na goteira supraescapular<sup>64</sup>. Nessa nota t&eacute;cnica prop&ocirc;s a utiliza&ccedil;&atilde;o de novos portais, neuroestimula&ccedil;&atilde;o e um artrosc&oacute;pio a 70&ordm;. Desde ent&atilde;o foram publicadas m&uacute;ltiplas notas t&eacute;cnicas<sup>7, 65-72</sup> com descri&ccedil;&otilde;es detalhadas de alternativas e varia&ccedil;&otilde;es deste procedimento (<a name="topf6"></a><a href="#f6">Figura 6</a>).</p>    <p>&nbsp;</p><a name="f6"></a>     <p>    <center><img src="/img/revistas/rpot/v22n3/22n3a02f6.jpg" width="391" height="342" border="0" /></center></p>    
<p>&nbsp;</p>
    <p>Lafosse em 2007 descreve um aperfei&ccedil;oamento da t&eacute;cnica completamente artrosc&oacute;pica<sup>7</sup> com a utiliza&ccedil;&atilde;o de um novo portal superior (portal de Lafosse) entre a clav&iacute;cula e a espinha da omoplata, cerca de 7 cm medial ao bordo lateral do acr&oacute;mio. Lafosse descreve tamb&eacute;m tr&ecirc;s grandes vantagens da via artrosc&oacute;pica sobre a via convencional aberta. Primeiro permite melhor visualiza&ccedil;&atilde;o das estruturas neurovasculares e do ligamento transverso da omoplata. O nervo supraescapular &eacute; pequeno (cerca de 2mm) e por vezes de dif&iacute;cil visualiza&ccedil;&atilde;o por via aberta. Isto pode resultar em les&atilde;o inadvertida do nervo durante a dissec&ccedil;&atilde;o at&eacute; &agrave; goteira supraescapular. O pequeno di&acirc;metro do nervo &eacute; facilmente visualizado pela amplia&ccedil;&atilde;o proporcionada pelo artrosc&oacute;pio e permite uma liberta&ccedil;&atilde;o mais f&aacute;cil e segura. Segundo, a liberta&ccedil;&atilde;o artrosc&oacute;pica &eacute; significativamente menos invasiva e n&atilde;o requer a desinser&ccedil;&atilde;o do trap&eacute;zio. Assim, os doentes t&ecirc;m menos dor comparativamente com a via aberta (sem necessidade de narc&oacute;ticos &agrave;s 72h p&oacute;s-operat&oacute;rio). Terceiro, &eacute; um procedimento que pode ser efetuado em regime de cirurgia de ambulat&oacute;rio e com um tempo cir&uacute;rgico significativamente inferior do que a via aberta (entre 1h nos primeiros casos e 10 minutos ap&oacute;s a curva de aprendizagem)<sup>7</sup> <a name="topf7"></a><a href="#f7">Figura 7</a>).&nbsp;</p>    <p>&nbsp;</p><a name="f7"></a>     <p>    <center><img src="/img/revistas/rpot/v22n3/22n3a02f7.jpg" width="392" height="357" border="0" /></center></p>    
<p>&nbsp;</p></font>    ]]></body>
<body><![CDATA[<p><b><font face="Verdana" size="2">Resultados do tratamento cirúrgico artroscópico na goteira supraescapular</font></b></p><font face="verdana" size="2">    <p>Em rela&ccedil;&atilde;o aos resultados do tratamento pela via artrosc&oacute;pica, encontram-se publicados apenas 4 estudos que, no total, reportam resultados de 68 doentes<sup>7, 45, 73, 74</sup>.</p>
    <p>Nestas s&eacute;ries podemos verificar que o diagn&oacute;stico foi efetuado com base na presen&ccedil;a de dor em cerca de 65% dos casos, nas altera&ccedil;&otilde;es electromiogr&aacute;ficas encontradas em 51% dos doentes, na resposta positiva &agrave; inje&ccedil;&atilde;o de anest&eacute;sico local na goteira supraclavicular em 38% dos casos e na diminui&ccedil;&atilde;o da for&ccedil;a muscular da rota&ccedil;&atilde;o externa em 34% dos doentes.</p>
    <p>A idade m&eacute;dia destes doentes foi de 52 anos, com um m&iacute;nimo de 41 e um m&aacute;ximo de 62 anos. O seguimento m&eacute;dio ponderado de todos os doentes foi de 20 meses.</p>
    <p>Dos 68 doentes reportados, houve melhoria da dor em 73% dos casos e quando foi efetuada uma electromiografia p&oacute;s-operat&oacute;ria, verificou-se normaliza&ccedil;&atilde;o das altera&ccedil;&otilde;es pre-operat&oacute;rias em 73% dos casos.</p>
    <p>Do ponto de vista da avalia&ccedil;&atilde;o cl&iacute;nica, 19 doentes foram avaliados pelo score de Constant que passou de 57.3 pr&eacute;-operatoriamente para 82.3 na avalia&ccedil;&atilde;o p&oacute;s-operat&oacute;ria. O Score ASES foi utilizado em 37 doentes e subiu de 40.96 para 76.38 entre as avalia&ccedil;&otilde;es pr&eacute; e p&oacute;s-operat&oacute;rias. Cerca de 71% dos doentes melhoraram o ASES de forma estatisticamente significativa. Em 27 doentes foi aplicado o SSV, sendo de 37.7% pr&eacute;-operatoriamente e de 64.4% no p&oacute;s-operat&oacute;rio.</p>
    <p>Foi encontrada uma tend&ecirc;ncia para melhor resultado em casos de doentes com sintomas recentes (&lt;1 ano), com in&iacute;cio insidioso das queixas, homens e nos doentes s&atilde;o sinistrados.</p>
    <p>Os 68 doentes avaliados nas 4 s&eacute;ries publicadas at&eacute; ao momento representam uma amostra ainda pequena para que possamos formular conclus&otilde;es seguras. Ainda assim, a tend&ecirc;ncia dos v&aacute;rios estudos foi para uma melhoria significativa da dor, regress&atilde;o das altera&ccedil;&otilde;es eletromiografias existentes e melhoria da fun&ccedil;&atilde;o ap&oacute;s o procedimento.</p>
    <p>Todos os estudos reportam melhoria do par&acirc;metro dor, o que parece ser um resultado consistente. Lafosse e Oizumi d&atilde;o especial import&acirc;ncia &agrave; normaliza&ccedil;&atilde;o electromiogr&aacute;fica verificada na maior parte dos seus doentes.</p>
    <p>A melhoria do score de Constant verificada por Clavert e do score ASES e SSV apresentados por Warner indicam que o procedimento &eacute; clinicamente relevante, com melhoria estatisticamente significativa dos scores avaliados. Warner excluiu do estudo doentes com patologia da coifa concomitante procurando isolar a patologia em estudo. Em todos os estudos s&atilde;o apresentadas como indica&ccedil;&otilde;es para a cirurgia a dor localizada &agrave; face posterosuperior do ombro, a exist&ecirc;ncia de altera&ccedil;&otilde;es na EMG e a limita&ccedil;&atilde;o da rota&ccedil;&atilde;o externa e da abdu&ccedil;&atilde;o, com ou sem atrofia dos m&uacute;sculos infraespinhoso e supraespinhoso.</p></font>    ]]></body>
<body><![CDATA[<p>&nbsp;</p>    <p><b><font face="Verdana" size="2">CONCLUSÃO</font></b></p><font face="verdana" size="2">    <p>A neuropatia compressiva do nervo supraescapular &eacute; atualmente uma entidade nosol&oacute;gica bem estabelecida e cada vez melhor compreendida. Deve ser sempre considerada no diagn&oacute;stico diferencial da patologia da cintura escapular, sobretudo em doentes jovens, atletas ou no contexto de roturas da coifa.</p>
    <p>A liberta&ccedil;&atilde;o artrosc&oacute;pica do nervo supraescapular &eacute; uma t&eacute;cnica recente mas em expans&atilde;o. Est&aacute; indicada em doentes com omalgia posterior, diminui&ccedil;&atilde;o da for&ccedil;a do supraespinhoso e infraespinhoso ou apenas do infraespinhoso, com ou sem altera&ccedil;&otilde;es electromiogr&aacute;ficas, mas apenas na fal&ecirc;ncia do tratamento conservador.</p>
    <p>Apesar das series publicadas at&eacute; ao momento serem pequenas, &eacute; um procedimento que parece proporcionar resultados cl&iacute;nicos positivos consistentes, constituindo um tratamento v&aacute;lido para a neuropatia compressiva do nervo supraescapular.&nbsp;</p></font>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">REFERÊNCIAS BIBLIOGRÁFICAS</font></b></p>    <!-- ref --><p><font face="verdana" size="2">1. Thomas A. La paralysie du muscle sous-epineux. La Press Medicale. 1936;  (44): 1283-1284</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=000150&pid=S1646-2122201400030000200001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="verdana" size="2">2. Schilf E. Unilateral paralysis of the suprascapular nerve. 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Arthroscopy techniques. 2012; 1 (2): 187-192</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=000222&pid=S1646-2122201400030000200072&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="verdana" size="2">73. Oizumi N, Suenaga N, Funakoshi T, Yamaguchi H, Minami A. Recovery of sensory disturbance after arthroscopic decompression of the suprascapular nerve. Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons. 2012; 21 (6): 759-764</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=000223&pid=S1646-2122201400030000200073&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font face="verdana" size="2">74. Clavert P. Arthroscopic Suprascapular nerve release for idiopatic compression: clinical and electromyographic results of a continuous series of 9 cases. ICSES Congress; ICSES; 2010.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000224&pid=S1646-2122201400030000200074&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> </font></p>    <p>&nbsp;</p>    <p><b><font face="Verdana" size="2">Conflito de interesse: </font></b></p><font face="verdana" size="2">    <p>Nada a declarar.</p></font>    <p>&nbsp;</p><a name="c"></a>    <p><b><font face="Verdana" size="2"><a href="#topc">Endereço para correspondência</a></font></b></p>    <p><font face="Verdana" size="2">Nuno Vieira Ferreira    <br>Serviço de Ortopedia e Traumatologia    ]]></body>
<body><![CDATA[<br>Hospital de Braga    <br>Sete Fontes S. Victor    <br>Apartado 2056    <br>4701-901 Braga    <br>Portugal    <br><a href="mailto:nvferreira@gmail.com">nvferreira@gmail.com</a></font></p>    <p>&nbsp;</p>    <p><font face="verdana" size="2"><b>Data de Submissão: </b> 2014-07-16</font></p>    <p><font face="verdana" size="2"><b>Data de Revisão: </b> 2014-09-03</font></p>    <p><font face="verdana" size="2"><b>Data de Aceitação: </b> 2014-11-10</font></p>    ]]></body>
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