{"id":10464,"date":"2021-11-12T06:00:52","date_gmt":"2021-11-12T06:00:52","guid":{"rendered":"https:\/\/endoscopiaterapeutica.net\/pt\/?p=10464"},"modified":"2021-11-17T17:38:35","modified_gmt":"2021-11-17T17:38:35","slug":"voce-sabe-o-que-e-fiducial","status":"publish","type":"post","link":"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/","title":{"rendered":"Voc\u00ea sabe o que \u00e9 fiducial?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">O c\u00e2ncer de p\u00e2ncreas \u00e9 a quarta principal neoplasia causadora de mortes nos Estados Unidos. Dos pacientes diagnosticados com essa condi\u00e7\u00e3o, apenas 10% s\u00e3o candidatos \u00e0 cirurgia, sendo que 30 a 40% s\u00e3o lim\u00edtrofes entre ressec\u00e1vel e localmente avan\u00e7ado, e os outros 50 a 60% j\u00e1 apresentam doen\u00e7a metast\u00e1tica.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dentre as op\u00e7\u00f5es terap\u00eauticas para os pacientes n\u00e3o candidatos cir\u00fargicos, a radioterapia tem um papel importante, sendo a modalidade estereot\u00e1xica a preferida pois consegue entregar uma alta dose de radia\u00e7\u00e3o em uma \u00e1rea bem-definida, aumentando sua efetividade e diminuindo os efeitos colaterais.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Um dos maiores desafios da radioterapia nos tumores de p\u00e2ncreas \u00e9 que, durante o ciclo respirat\u00f3rio, estima-se uma movimenta\u00e7\u00e3o do alvo entre 2 e 3 cm, dessa forma a implanta\u00e7\u00e3o de um marcador radiol\u00f3gico, <\/span><b><i>fiducial<\/i><\/b><span style=\"font-weight: 400;\">, forneceria um ponto de refer\u00eancia fixo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A implanta\u00e7\u00e3o do fiducial pode ser realizada por meio da ecoendoscopia, cirurgia ou mesmo percut\u00e2nea. Entretanto, o acesso pancre\u00e1tico percut\u00e2neo pode ser desafiador pelo risco de inj\u00faria vascular e\/ou a \u00f3rg\u00e3os adjacentes, al\u00e9m da maior possibilidade de implanta\u00e7\u00e3o neopl\u00e1sica peritoneal, sendo o acesso cir\u00fargico mais invasivo. Assim, a implanta\u00e7\u00e3o por meio da ecoendoscopia tem surgido como primeira op\u00e7\u00e3o nesses casos.<\/span><\/p>\n<h2>Tipos<\/h2>\n<p><span style=\"font-weight: 400;\">Os fiducials mais comuns s\u00e3o os s\u00f3lidos feitos de ouro ou platina, sendo que ainda h\u00e1 modelos menos comuns de pol\u00edmeros de carbono e ensaios cl\u00ednicos iniciais utilizando l\u00edquidos. A utiliza\u00e7\u00e3o de l\u00edquidos (hydrogel) teria o benef\u00edcio de n\u00e3o produzir artefatos, baixo risco de migra\u00e7\u00e3o e seu desaparecimento local ap\u00f3s o per\u00edodo de tratamento. Com rela\u00e7\u00e3o ao formato, eles podem ser retos (cil\u00edndricos) ou em forma de bobina (coil), que, em teoria, apresentaram um risco menor de migra\u00e7\u00e3o, apesar de um recente estudo feito por Kashab n\u00e3o ter demonstrado diferen\u00e7a.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Em uma pesquisa feita entre m\u00e9dicos, os modelos mais utilizados s\u00e3o os cil\u00edndricos ou <\/span><i><span style=\"font-weight: 400;\">coil<\/span><\/i><span style=\"font-weight: 400;\">, feitos de ouro (maior disponibilidade de modelos), com di\u00e2metros entre 0,35 e 0,43 mm e comprimento de 5 a 10 mm, apresentando uma melhor rela\u00e7\u00e3o entre contraste e artefatos. Entretanto, os estudos comparando os diversos modelos s\u00e3o conflitantes, n\u00e3o havendo defini\u00e7\u00e3o sobre o melhor material ou formato.<\/span><\/p>\n<div id=\"attachment_10465\" style=\"width: 537px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-10465\" class=\"wp-image-10465 size-full\" title=\"Fiducials tipo coil e reto de platina\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2021\/11\/Fiducials-tipo-coil-e-reto-de-platina.png\" alt=\"Fiducials tipo coil e reto de platina\" width=\"527\" height=\"433\" \/><p id=\"caption-attachment-10465\" class=\"wp-caption-text\">Figura 1: Fiducials tipo coil e reto de platina (LumiCoil\u00ae)<\/p><\/div>\n<h2>T\u00e9cnica<\/h2>\n<p><span style=\"font-weight: 400;\">Sua implanta\u00e7\u00e3o \u00e9 realizada por meio de agulhas de FNA, sendo que os fiducials com di\u00e2metro \u2265 0.75 mm necessitam de uma agulha de 19G. Entretanto, devido \u00e0 facilidade t\u00e9cnica, sempre que poss\u00edvel o ideal \u00e9 a utiliza\u00e7\u00e3o de agulhas 22G.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Existem duas diferentes t\u00e9cnicas de carregamento do fiducial: pela ponta e pelo luer da agulha. Pelo luer, a agulha FNA \u00e9 locada \u00e0 les\u00e3o, na sequ\u00eancia o estilete \u00e9 removido, seguido da introdu\u00e7\u00e3o do fiducial no l\u00famen da agulha, o qual \u00e9 empurrado com o estilete. Essa t\u00e9cnica pode ser desafiadora nos casos em que a agulha est\u00e1 angulada, al\u00e9m da possibilidade de entrarem bolhas de ar na agulha ap\u00f3s a retirada do estilete, prejudicando a visualiza\u00e7\u00e3o adequada do procedimento. Na t\u00e9cnica pela ponta, a agulha \u00e9 carregada com o estilete previamente \u00e0 sua introdu\u00e7\u00e3o. Inicialmente, o estilete \u00e9 retra\u00eddo 10 mm, seguido da coloca\u00e7\u00e3o do fiducial em sua ponta. Existem ainda agulhas j\u00e1 pr\u00e9-carregadas com fiducials, que n\u00e3o demonstraram superioridade em estudos cl\u00ednicos.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">No Brasil, atualmente, est\u00e1 dispon\u00edvel o modelo da <a href=\"https:\/\/www.bostonscientific.com\/en-US\/products\/fiducial-markers\/lumicoil-platinum-fiducial-markers.html\" target=\"_blank\" rel=\"noopener\">LumiCoil<\/a><\/span><span style=\"font-weight: 400;\">\u00ae<\/span><span style=\"font-weight: 400;\"> da Boston Scientific, feito de platina, nos tamanhos 5 mm no formato reto e 10 mm no formato coil, ambos compat\u00edveis com agulha FNA 22G, sendo poss\u00edvel o carregamento pela ponta e pelo luer na reta e apenas pela ponta na coil.<\/span><\/p>\n<h2>Resultados<\/h2>\n<p><span style=\"font-weight: 400;\">Com rela\u00e7\u00e3o ao sucesso t\u00e9cnico do procedimento, as revis\u00f5es demonstraram resultados entre 96 e 98%. A dificuldade t\u00e9cnica ocorre principalmente nos casos de les\u00f5es em cabe\u00e7a pancre\u00e1tica ou processo uncinado, utilizando agulhas de 19G e carregamento pelo luer.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O risco de migra\u00e7\u00e3o fica em entre 3 e 4% e pode ocorrer de forma imediata devido a dificuldades t\u00e9cnicas ou mesmo tardio por regress\u00e3o do tumor ap\u00f3s terapia neoadjuvante. Inflama\u00e7\u00e3o e sangramento consequentes ao trauma na introdu\u00e7\u00e3o do fiducial tamb\u00e9m podem levar \u00e0 migra\u00e7\u00e3o.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Os eventos adversos costumam ser leves, em torno de 4%, sendo os mais comuns pequenos sangramentos, pancreatites e infec\u00e7\u00f5es leves. Com o intuito de evitar infec\u00e7\u00f5es mais importantes, a profilaxia antibi\u00f3tica deve ser sempre realizada.<\/span><\/p>\n<h2>Conclus\u00e3o<\/h2>\n<p><span style=\"font-weight: 400;\">A t\u00e9cnica de introdu\u00e7\u00e3o de fiducials por meio da ecoendoscopia tem papel importante na radioterapia estereot\u00e1xica, auxiliando na utiliza\u00e7\u00e3o da t\u00e9cnica, por\u00e9m ainda s\u00e3o necess\u00e1rios estudos prospectivos e randomizados para defini\u00e7\u00e3o de melhor t\u00e9cnica e material. Dessa forma, a discuss\u00e3o pr\u00e9via entre ecoendoscopistas, oncologistas, cirurgi\u00f5es e radioterapeutas deve ser sempre realizada.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Veja abaixo o v\u00eddeo sobre esse fiducial:<\/span><\/p>\n<div  id=\"_ytid_72412\"  width=\"600\" height=\"300\"  data-origwidth=\"600\" data-origheight=\"300\" data-facadesrc=\"https:\/\/www.youtube.com\/embed\/1hr_7dSKe_U?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;rel=1&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;disablekb=0&#038;\" class=\"__youtube_prefs__ epyt-facade epyt-is-override  no-lazyload\" data-epautoplay=\"1\" ><img decoding=\"async\" data-spai-excluded=\"true\" class=\"epyt-facade-poster skip-lazy\" loading=\"lazy\"  alt=\"YouTube player\"  src=\"https:\/\/i.ytimg.com\/vi\/1hr_7dSKe_U\/maxresdefault.jpg\"  \/><button class=\"epyt-facade-play\" aria-label=\"Play\"><svg data-no-lazy=\"1\" height=\"100%\" version=\"1.1\" viewBox=\"0 0 68 48\" width=\"100%\"><path class=\"ytp-large-play-button-bg\" d=\"M66.52,7.74c-0.78-2.93-2.49-5.41-5.42-6.19C55.79,.13,34,0,34,0S12.21,.13,6.9,1.55 C3.97,2.33,2.27,4.81,1.48,7.74C0.06,13.05,0,24,0,24s0.06,10.95,1.48,16.26c0.78,2.93,2.49,5.41,5.42,6.19 C12.21,47.87,34,48,34,48s21.79-0.13,27.1-1.55c2.93-0.78,4.64-3.26,5.42-6.19C67.94,34.95,68,24,68,24S67.94,13.05,66.52,7.74z\" fill=\"#f00\"><\/path><path d=\"M 45,24 27,14 27,34\" fill=\"#fff\"><\/path><\/svg><\/button><\/div>\n<h2>Resumo<\/h2>\n<ul>\n<li><span style=\"font-weight: 400;\">Fiducial: marcador radiopaco para radioterapia estereot\u00e1xica;<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Material: s\u00f3lidos (ouro, platina e carbono) e l\u00edquidos (em testes cl\u00ednicos);<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Formato: reto e coil;<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Agulhas FNA para implanta\u00e7\u00e3o: <\/span><b>22G<\/b><span style=\"font-weight: 400;\"> e 19G.<\/span><\/li>\n<\/ul>\n<h2>Como citar este artigo<\/h2>\n<p><span style=\"font-weight: 400;\">Oliveira JF. Voc\u00ea sabe o que \u00e9 fiducial?. Endoscopia Terap\u00eautica; 2021. Dispon\u00edvel em: https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/<\/span><\/p>\n<h2>Quer saber mais sobre fiducials?<\/h2>\n<p><span style=\"font-weight: 400;\">Acesse os links abaixo:<\/span><\/p>\n<ol>\n<li><a href=\"https:\/\/www.bostonscientific.com\/en-US\/products\/fiducial-markers\/lumicoil-platinum-fiducial-markers.html\"><span style=\"font-weight: 400;\">https:\/\/www.bostonscientific.com\/en-US\/products\/fiducial-markers\/lumicoil-platinum-fiducial-markers.html<\/span><\/a><\/li>\n<li><span style=\"font-weight: 400;\">Kerdsirichairat T, Shin EJ. <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/32740001\/\"><span style=\"font-weight: 400;\">Role of endoscopic ultrasonography guided fiducial marker placement in gastrointestinal cancer<\/span><\/a><span style=\"font-weight: 400;\">. Curr Opin Gastroenterol. 2020 Sep;36(5):402-408. doi: 10.1097\/MOG.0000000000000662. PMID: 32740001.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Yoo J, Kistler CA, Yan L, Dargan A, Siddiqui AA. <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/28078128\/\"><span style=\"font-weight: 400;\">Endoscopic ultrasound in pancreatic cancer: innovative applications beyond the basics<\/span><\/a><span style=\"font-weight: 400;\">. J Gastrointest Oncol. 2016 Dec;7(6):1019-1029. doi: 10.21037\/jgo.2016.08.07. PMID: 28078128; PMCID: PMC5177581.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Kim SH, Shin EJ. <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/34082487\/\"><span style=\"font-weight: 400;\">Endoscopic Ultrasound-Guided Fiducial Placement for Stereotactic Body Radiation Therapy in Pancreatic Malignancy<\/span><\/a><span style=\"font-weight: 400;\">. Clin Endosc. 2021 May;54(3):314-323. doi: 10.5946\/ce.2021.102. Epub 2021 May 28. PMID: 34082487; PMCID: PMC8182253.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Acesse o <\/span><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/\"><span style=\"font-weight: 400;\">Endoscopia Terap\u00eautica<\/span><\/a><span style=\"font-weight: 400;\"> para tomar contato com mais <\/span><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/artigos-comentados\/\"><span style=\"font-weight: 400;\">artigos comentados<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntos-gerais\/\"><span style=\"font-weight: 400;\">assuntos gerais<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/casos-clinicos\/\"><span style=\"font-weight: 400;\">casos cl\u00ednicos<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/quiz\/\"><span style=\"font-weight: 400;\">quizzes<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/classificacoes\/\"><span style=\"font-weight: 400;\">classifica\u00e7\u00f5es<\/span><\/a><span style=\"font-weight: 400;\"> e mais!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O c\u00e2ncer de p\u00e2ncreas \u00e9 a quarta principal neoplasia causadora de mortes nos Estados&hellip;<\/p>\n","protected":false},"author":2592,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[151],"tags":[],"ano":[262],"tipo":[154],"volume":[147],"class_list":["post-10464","post","type-post","status-publish","format-standard","hentry","category-assuntosgerais","ano-262","tipo-ecoendoscopia","volume-volume-ii"],"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>Voc\u00ea sabe o que \u00e9 fiducial? &#8226; Endoscopia Terapeutica<\/title>\n<meta name=\"description\" content=\"A t\u00e9cnica de introdu\u00e7\u00e3o de fiducials atrav\u00e9s a ecoendoscopia tem papel importante na radioterapia estereot\u00e1xica\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Voc\u00ea sabe o que \u00e9 fiducial?\" \/>\n<meta property=\"og:description\" content=\"O c\u00e2ncer de p\u00e2ncreas \u00e9 a quarta principal neoplasia causadora de mortes nos Estados Unidos. Dos pacientes diagnosticados com essa condi\u00e7\u00e3o, apenas 10% s\u00e3o\" \/>\n<meta property=\"og:url\" content=\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/\" \/>\n<meta property=\"og:site_name\" content=\"Endoscopia Terapeutica\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/endoscopiaterapeutica\" \/>\n<meta property=\"article:published_time\" content=\"2021-11-12T06:00:52+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-11-17T17:38:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2021\/11\/Fiducials-tipo-coil-e-reto-de-platina.png\" \/>\n<meta name=\"author\" content=\"Joel Fernandez de Oliveira\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Joel Fernandez de Oliveira\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/\"},\"author\":{\"name\":\"Joel Fernandez de Oliveira\",\"@id\":\"https:\/\/endoscopiaterapeutica.net\/pt\/#\/schema\/person\/44154e75b8892daa6137c7c3e9f6acd0\"},\"headline\":\"Voc\u00ea sabe o que \u00e9 fiducial?\",\"datePublished\":\"2021-11-12T06:00:52+00:00\",\"dateModified\":\"2021-11-17T17:38:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/\"},\"wordCount\":1027,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/endoscopiaterapeutica.net\/pt\/#organization\"},\"image\":{\"@id\":\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2021\/11\/Fiducials-tipo-coil-e-reto-de-platina.png\",\"articleSection\":[\"Assuntos Gerais\"],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/\",\"url\":\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/voce-sabe-o-que-e-fiducial\/\",\"name\":\"Voc\u00ea sabe o que \u00e9 fiducial? 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