{"id":19780,"date":"2025-02-11T07:30:00","date_gmt":"2025-02-11T07:30:00","guid":{"rendered":"https:\/\/endoscopiaterapeutica.net\/pt\/uncategorized\/ablacao-por-radiofrequencia-nas-estenoses-biliares-malignas-afinal-de-contas-e-eficaz-vale-a-pena\/"},"modified":"2025-04-03T19:24:20","modified_gmt":"2025-04-03T19:24:20","slug":"ablacao-por-radiofrequencia-nas-estenoses-biliares-malignas-afinal-de-contas-e-eficaz-vale-a-pena","status":"publish","type":"post","link":"https:\/\/endoscopiaterapeutica.net\/pt\/casosclinicos\/ablacao-por-radiofrequencia-nas-estenoses-biliares-malignas-afinal-de-contas-e-eficaz-vale-a-pena\/","title":{"rendered":"Abla\u00e7\u00e3o por Radiofrequ\u00eancia nas Estenoses Biliares Malignas. Afinal de contas \u00e9 eficaz? Vale a pena?"},"content":{"rendered":"\n<p>A abla\u00e7\u00e3o por radiofrequ\u00eancia (RFA) \u00e9 uma t\u00e9cnica ablativa amplamente utilizada em diversas condi\u00e7\u00f5es, incluindo estenoses biliares malignas, adenomas residuais ap\u00f3s papilectomia endosc\u00f3pica e les\u00f5es pancre\u00e1ticas s\u00f3lidas e c\u00edsticas [1].&nbsp;<\/p>\n\n\n\n<p>O procedimento baseia-se na emiss\u00e3o de energia t\u00e9rmica por meio de uma sonda bipolar, que utiliza corrente alternada de alta frequ\u00eancia para gerar calor (60-100\u00b0C), provocando necrose tecidual localizada. A destrui\u00e7\u00e3o do tecido depende do contato direto com o eletrodo e do conte\u00fado h\u00eddrico do tecido, que influencia sua condutividade [1].<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69d5de675cedd&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69d5de675cedd\" class=\"aligncenter size-full is-resized wp-lightbox-container\"><img fetchpriority=\"high\" decoding=\"async\" width=\"572\" height=\"572\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/cateter-endoscopico-de-radiofrequencia.jpg\" alt=\"\" class=\"wp-image-19833\" style=\"width:387px;height:auto\" srcset=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/cateter-endoscopico-de-radiofrequencia.jpg 572w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/cateter-endoscopico-de-radiofrequencia-300x300.jpg 300w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/cateter-endoscopico-de-radiofrequencia-150x150.jpg 150w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/cateter-endoscopico-de-radiofrequencia-70x70.jpg 70w\" sizes=\"(max-width: 572px) 100vw, 572px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Ampliar\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">Figura 1: cateter endosc\u00f3pico de radiofrequencia.&nbsp;<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Embora geralmente bem tolerada, a RFA apresenta eventos adversos (EAs) associados, que incluem dor abdominal, colangite, pancreatite, hemobilia, abscesso hep\u00e1tico e colecistite. Esses EAs s\u00e3o em grande parte similares aos observados em procedimentos de CPRE, mas podem ser agravados pela abla\u00e7\u00e3o t\u00e9rmica.<\/p>\n\n\n\n<p>O intuito dessa revis\u00e3o n\u00e3o \u00e9 explicar a t\u00e9cnica passo a passo da RFA na via biliar (<a href=\"https:\/\/endoscopiaterapeutica.net\/assuntosgerais\/endoscopia-no-colangiocarcinoma\/\">clique aqui sobre informa\u00e7\u00f5es de Endoscopia no colangiocarcinoma<\/a>), mas sim fazer um resumo das evid\u00eancias cient\u00edficas sobre sua efic\u00e1cia. Vamos l\u00e1!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Aplica\u00e7\u00e3o nas Estenoses Biliares Malignas<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Desde 2011, a RFA tem sido explorada como tratamento para obstru\u00e7\u00f5es biliares malignas irressec\u00e1veis.&nbsp;<\/li>\n\n\n\n<li>Estudos iniciais retrospectivos sugeriram que o uso combinado de RFA com pr\u00f3teses biliares poderia prolongar a pat\u00eancia do stent e, potencialmente, melhorar a sobrevida dos pacientes. A simplicidade e a seguran\u00e7a do procedimento contribu\u00edram para a expans\u00e3o de suas aplica\u00e7\u00f5es cl\u00ednicas [2,3].<\/li>\n\n\n\n<li>No entanto, a maior parte das evid\u00eancias iniciais baseava-se em s\u00e9ries retrospectivas de casos, limitando a robustez das conclus\u00f5es [2,3].<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69d5de675d7a2&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69d5de675d7a2\" class=\"aligncenter size-full is-resized wp-lightbox-container\"><img decoding=\"async\" width=\"1212\" height=\"1226\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar.jpg\" alt=\"\" class=\"wp-image-19835\" style=\"width:352px;height:auto\" srcset=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar.jpg 1212w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar-297x300.jpg 297w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar-1012x1024.jpg 1012w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar-768x777.jpg 768w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar-70x70.jpg 70w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar-1170x1184.jpg 1170w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2025\/02\/aplicacao-da-RFA-na-estenose-maligna-da-via-biliar-585x592.jpg 585w\" sizes=\"(max-width: 1212px) 100vw, 1212px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Ampliar\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">Figura 2: aplica\u00e7\u00e3o da RFA na estenose maligna da via biliar. Modificado de&nbsp;Gao DJ, et al. Gastrointest Endosc 2021 [ref. 5]<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>Evid\u00eancias Mais Recentes<\/strong><\/h2>\n\n\n\n<p>Os estudos prospectivos randomizados (RCTs), iniciados em 2018, trouxeram mais clareza sobre o papel da RFA nas estenoses biliares malignas. Entre as principais evid\u00eancias:<\/p>\n\n\n\n<p>1.&nbsp;&nbsp;&nbsp;&nbsp;<strong>Primeiros RCTs Favor\u00e1veis:<\/strong><\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2022&nbsp;&nbsp;&nbsp;Um estudo com 65 pacientes com colangiocarcinoma irressec\u00e1vel demonstrou que o uso de RFA combinado com coloca\u00e7\u00e3o de stents aumentou significativamente a sobrevida (13,2 vs. 8,3 meses;&nbsp;<em>p<\/em>&nbsp;&lt; 0,001), sem diferen\u00e7as nos EAs [4].<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2022&nbsp;&nbsp;&nbsp;Outro RCT com 174 pacientes mostrou benef\u00edcio na sobrevida com a combina\u00e7\u00e3o de RFA e stent, apesar de n\u00e3o observar diferen\u00e7as na pat\u00eancia do stent ou no controle da icter\u00edcia [5].<\/p>\n\n\n\n<p>2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>Evid\u00eancias Contradit\u00f3rias em Estudos Recentes:<\/strong><\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2022&nbsp;&nbsp;&nbsp;Um RCT de 2022 com 86 pacientes comparou stents met\u00e1licos isolados versus RFA + stents, n\u00e3o encontrando diferen\u00e7as significativas na pat\u00eancia do stent ou na sobrevida global entre os grupos [6].<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2022&nbsp;&nbsp;&nbsp;Uma meta-an\u00e1lise de 2018 envolvendo 505 pacientes (9 estudos), sugeriu um pequeno benef\u00edcio de sobrevida com a combina\u00e7\u00e3o de RFA e stent (285 vs. 248 dias), embora o ganho absoluto tenha sido modesto (37 dias). [7]<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2022&nbsp;&nbsp;&nbsp;Em um estudo randomizado mais recente, Jarosova et al. (2022) avaliaram 161 pacientes com colangiocarcinoma (73 hilar) e adenocarcinoma ductal pancre\u00e1tico, n\u00e3o encontrando diferen\u00e7as significativas na sobrevida ou na pat\u00eancia do stent. A mediana de sobrevida foi semelhante entre os grupos (10,5 vs. 10,6 meses para colangiocarcinoma e 5,4 vs. 7,7 meses para c\u00e2ncer pancre\u00e1tico). Devido \u00e0 futilidade dos resultados, sem benef\u00edcio aos pacientes, o estudo foi encerrado antes do previsto. [8]<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n\n\n\n<p class=\"has-pale-ocean-gradient-background has-background\">Embora a RFA tenha mostrado resultados promissores iniciais, estudos mais recentes apontam que seu benef\u00edcio na sobrevida e na pat\u00eancia de stents em estenoses biliares malignas \u00e9 limitado. A t\u00e9cnica permanece segura e bem tolerada, mas sua efic\u00e1cia como terapia adjuvante ainda \u00e9 debatida. Novos estudos s\u00e3o necess\u00e1rios para identificar subgrupos de pacientes que possam se beneficiar da interven\u00e7\u00e3o.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Quer saber mais sobre CPRE? Confira nosso curso <a href=\"https:\/\/endoscopiaterapeutica.net\/cursos\/cpre-do-basico-ao-avancado\/\" target=\"_blank\" rel=\"noreferrer noopener\">CPRE: do b\u00e1sico ao avan\u00e7ado<\/a><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Referencias<\/strong><\/h2>\n\n\n\n<p>1.&nbsp;American Society for Gastrointestinal Endoscopy Technology Committee; Das KK, Chen D, Akshintala VS, Chen YI, Girotra M, Han S, Kahn A, Mishra G, Muthusamy VR, Obando JV, Onyimba FU, Pawa S, Rustagi T, Sakaria S, Trikudanathan G, Law R; American Society for Gastrointestinal Endoscopy Technology Committee Chair. Pancreas and biliary ablation devices. Gastrointest Endosc. 2024 Dec;100(6):980-993. doi: 10.1016\/j.gie.2024.05.004.&nbsp;Epub 2024 Oct 11. PMID: 39396364.<\/p>\n\n\n\n<p>2. Zacharoulis D, Lazoura O, Sioka E et al.&nbsp;Habib EndoHPB: a novel endobiliary radiofrequency ablation device. An experimental study. J Invest Surg 2013; 26: 6 \u2013 10<\/p>\n\n\n\n<p>3. Laquiere A, Boustiere C, Leblanc S et al. Safety and feasibility of endoscopic biliary radiofrequency ablation treatment of extrahepatic cholangiocarcinoma. Surg Endosc 2016; 30: 1242 \u2013 1248&nbsp;<\/p>\n\n\n\n<p>4. Yang J, Wang J, Zhou H, et al. Efficacy and safety of endoscopic radiofrequency ablation for unresectable extrahepatic cholangiocarcinoma: a randomized trial. Endoscopy 2018;50:751-60.<\/p>\n\n\n\n<p>5. Gao DJ, Yang JF, Ma SR, et al. Endoscopic radiofrequency ablation plus plastic stent placement versus stent placement alone for unresectable extrahepatic biliary cancer: a multicenter randomized controlled trial. Gastrointest Endosc 2021;94:91-100.<\/p>\n\n\n\n<p>6. Albers D, Schmidt A, Schiemer M, et al. Impact of endobiliary radiofrequency ablation on biliary drainage in patients with malignant biliary strictures treated with uncovered self-expandable metal stents: a randomized controlled multicenter trial. Gastrointest Endosc 2022;96:970-9.<\/p>\n\n\n\n<p>7. Sofi AA, Khan MA, Das A, et al. Radiofrequency ablation combined with biliary stent placement versus stent placement alone for malignant biliary strictures: a systematic review and meta-analysis.&nbsp;Gastrointest Endosc 2018;87:944-51.<\/p>\n\n\n\n<p>8. Jarosova J, Zarivnijova L, Cibulkova I, et al.&nbsp;Endoluminal radiofrequency ablation in patients with malignant biliary obstruction: a randomised trial. Gut 2023;72:2286-93.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Como citar este artigo<\/strong><\/h2>\n\n\n\n<p class=\"has-pale-ocean-gradient-background has-background\">Martins B. Abla\u00e7\u00e3o por Radiofrequ\u00eancia nas Estenoses Biliares Malignas. Afinal de contas \u00e9 eficaz? Vale a pena? Endoscopia Terapeutica. Ano 2025 Vol I. Dispon\u00edvel em: https:\/\/endoscopiaterapeutica.net\/uncategorized\/rascunho-automatico\/<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A abla\u00e7\u00e3o por radiofrequ\u00eancia (RFA) \u00e9 uma t\u00e9cnica ablativa amplamente utilizada em diversas condi\u00e7\u00f5es,&hellip;<\/p>\n","protected":false},"author":712,"featured_media":19835,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[150],"tags":[294,787],"ano":[783],"tipo":[788],"volume":[263],"class_list":["post-19780","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-casosclinicos","tag-cpre","tag-vias-biliares","ano-783","tipo-assuntos-gerais","volume-volume-i"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Abla\u00e7\u00e3o por Radiofrequ\u00eancia nas Estenoses Biliares Malignas. 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