{"id":21093,"date":"2026-03-24T07:00:00","date_gmt":"2026-03-24T07:00:00","guid":{"rendered":"https:\/\/endoscopiaterapeutica.net\/pt\/?p=21093"},"modified":"2026-03-17T01:25:54","modified_gmt":"2026-03-17T01:25:54","slug":"sera-que-mucosectomia-underwater-uemr-pode-ser-o-futuro-das-resseccoes-de-lesoes-de-colon","status":"publish","type":"post","link":"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/sera-que-mucosectomia-underwater-uemr-pode-ser-o-futuro-das-resseccoes-de-lesoes-de-colon\/","title":{"rendered":"Ser\u00e1 que UNDERWATER pode ser o futuro das ressec\u00e7\u00f5es de les\u00f5es de c\u00f3lon?"},"content":{"rendered":"\n<p>O padr\u00e3o atual para remo\u00e7\u00e3o de p\u00f3lipos m\u00e9dios (10\u201320 mm) \u00e9 Mucosectomia Convencional (EMR), que depende da inje\u00e7\u00e3o de solu\u00e7\u00e3o salina para elevar a les\u00e3o. Por\u00e9m, esse padr\u00e3o-ouro tem uma falha importante: frequentemente n\u00e3o remove os tumores em bloco, levando a ressec\u00e7\u00f5es fragmentadas e taxas de recorr\u00eancia entre 15% e 23,5%.<\/p>\n\n\n\n<p>O segredo est\u00e1 na f\u00edsica. Ao injetar fluido sob o p\u00f3lipo, criamos tens\u00e3o na mucosa, o que dificulta ao endoscopista capturar profundamente a les\u00e3o com a al\u00e7a. Recentemente, uma t\u00e9cnica vem revolucionando o campo: a Ressec\u00e7\u00e3o Endosc\u00f3pica da Mucosa Subaqu\u00e1tica, tamb\u00e9m conhecida como Mucosectomia Underwater (UEMR). Esta t\u00e9cnica elimina a inje\u00e7\u00e3o e preenche o c\u00f3lon com \u00e1gua, permitindo que a flutuabilidade natural fa\u00e7a o trabalho.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>N\u00e3o \u00e9 necess\u00e1rio injetar para alcan\u00e7ar profundidade<\/strong><\/h2>\n\n\n\n<p>O achado mais surpreendente dos estudos cl\u00ednicos recentes \u00e9 que n\u00e3o \u00e9 preciso um \u201ccolch\u00e3o\u201d salino para cortar com seguran\u00e7a e profundidade.<\/p>\n\n\n\n<p>Em um estudo cl\u00ednico randomizado, a UEMR atingiu profundidade m\u00e9dia de 1.688,9 \u03bcm, numericamente maior que os 1.432,3 \u03bcm obtidos pelo m\u00e9todo com inje\u00e7\u00e3o. Embora o resultado tenha mostrado apenas <em>n\u00e3o inferioridade estat\u00edstica<\/em> (P=0,18), ele desmonta o mito de que a inje\u00e7\u00e3o \u00e9 essencial para seguran\u00e7a.<\/p>\n\n\n\n<p>O segredo \u00e9 um fen\u00f4meno chamado redu\u00e7\u00e3o gravitacional. Ao encher o c\u00f3lon com \u00e1gua em vez de ar, a flutuabilidade faz a les\u00e3o \u201cboiar\u201d para longe da muscular pr\u00f3pria, permitindo que a al\u00e7a capture tecido submucoso adequado sem risco de envolvimento muscular ou perfura\u00e7\u00e3o.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/?attachment_id=21094\"><img fetchpriority=\"high\" decoding=\"async\" width=\"461\" height=\"421\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/FIGURA-1-ECOENDOSCOPIA.jpg?v=1773164600\" alt=\"Mucosectomia underwater evidenciando flutua\u00e7\u00e3o da mucosa e submucosa\" class=\"wp-image-21094\" srcset=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/FIGURA-1-ECOENDOSCOPIA.jpg?v=1773164600 461w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/FIGURA-1-ECOENDOSCOPIA-300x274.jpg?v=1773164600 300w\" sizes=\"(max-width: 461px) 100vw, 461px\" \/><\/a><figcaption class=\"wp-element-caption\"><br>Figura 1: Ecoendoscopia evidenciado a mucosa e submucosa \u2018flutuando\u201d enquanto a camada muscular se mant\u00e9m est\u00e1vel. Na UEMR, as les\u00f5es flutuam na \u00e1gua por redu\u00e7\u00e3o gravitacional, permitindo ressec\u00e7\u00e3o segura sem envolver a camada muscular.<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><br><strong>UEMR e o c\u00f3lon direito<\/strong><\/h2>\n\n\n\n<p>O c\u00f3lon direito, especialmente o ceco e o c\u00f3lon ascendente s\u00e3o \u00e1reas de desafio para o endoscopista: paredes finas, curvas dif\u00edceis e maior dificuldade t\u00e9cnica. Mesmo assim, na UEMR, os resultados foram superiores: 1.822,4 \u03bcm de profundidade contra 1.096,5 \u03bcm com EMR (P=0,01).<\/p>\n\n\n\n<p>A UEMR se destaca no c\u00f3lon direito porque:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>as paredes finas tornam perigoso uma ressec\u00e7\u00e3o profunda com inje\u00e7\u00e3o,<\/li>\n\n\n\n<li>a \u00e1gua evita a tens\u00e3o excessiva da insufla\u00e7\u00e3o com ar,<\/li>\n\n\n\n<li>h\u00e1 melhor manobrabilidade em \u00e2ngulos dif\u00edceis.<\/li>\n<\/ul>\n\n\n\n<p>Com \u00e1gua, a press\u00e3o intraluminal diminui e a parede n\u00e3o fica esticada, permitindo que o tumor protrua mais naturalmente e seja capturado com seguran\u00e7a.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>Tratando p\u00f3lipos planos<\/strong><\/h2>\n\n\n\n<p>P\u00f3lipos superficiais (\u201cflat\u201d) s\u00e3o desafiadores porque costumam estar presos por fibrose submucosa, que impede a eleva\u00e7\u00e3o com a inje\u00e7\u00e3o. A UEMR resolve isso: a flutuabilidade transforma a les\u00e3o plana em uma les\u00e3o polipoide, permitindo profundidades significativamente maiores (1.238,7 \u03bcm vs. 731,6 \u03bcm; P&lt;0,01).<\/p>\n\n\n\n<p>Debaixo d\u2019\u00e1gua, a for\u00e7a de flutua\u00e7\u00e3o supera a fibrose e libera a base da les\u00e3o, facilitando a captura pela al\u00e7a.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/?attachment_id=21095\"><img decoding=\"async\" width=\"1024\" height=\"301\" src=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/Figura-2.-Mucosectomia-underwater-1024x301.jpg?v=1773164764\" alt=\"Mucosectomia underwater para les\u00e3o plana do c\u00f3lon sem inje\u00e7\u00e3o submucosa\" class=\"wp-image-21095\" srcset=\"https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/Figura-2.-Mucosectomia-underwater-1024x301.jpg?v=1773164764 1024w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/Figura-2.-Mucosectomia-underwater-300x88.jpg?v=1773164764 300w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/Figura-2.-Mucosectomia-underwater-768x226.jpg?v=1773164764 768w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/Figura-2.-Mucosectomia-underwater-1170x344.jpg?v=1773164764 1170w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/Figura-2.-Mucosectomia-underwater-585x172.jpg?v=1773164764 585w, https:\/\/endoscopiaterapeutica.net\/pt\/wp-content\/uploads\/2026\/03\/Figura-2.-Mucosectomia-underwater.jpg?v=1773164764 1441w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><br>Figura 2. Mucosectomia underwater. Les\u00e3o plana de reto. Infus\u00e3o de \u00e1gua seguida de captura da les\u00e3o com al\u00e7a, sem inje\u00e7\u00e3o.<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>O grande equalizador dos endoscopistas<\/strong><\/h2>\n\n\n\n<p>A descoberta mais impactante: a UEMR reduz a depend\u00eancia da experi\u00eancia do operador.<\/p>\n\n\n\n<p>Endoscopistas com &lt;10 anos de pr\u00e1tica obtiveram profundidades maiores com UEMR (1.786,6 \u03bcm) do que com EMR (1.192,4 \u03bcm). Isso ocorre porque a inje\u00e7\u00e3o aumenta a tens\u00e3o mucosa, tornando o alvo mais dif\u00edcil. J\u00e1 na UEMR, a les\u00e3o flutua, tornando o procedimento mais intuitivo e uniforme entre diferentes n\u00edveis de habilidade.<\/p>\n\n\n\n<p>E tudo isso sem aumentar o tempo de procedimento (7,2 min vs. 6,5 min; P=0,34).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>Conclus\u00e3o: ser\u00e1 que estamos em frente \u00e0 um novo padr\u00e3o-ouro?<\/strong><\/h2>\n\n\n\n<p>Os dados mostram que a UEMR \u00e9:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>n\u00e3o inferior em profundidade total,<\/li>\n\n\n\n<li>superior no c\u00f3lon direito,<\/li>\n\n\n\n<li>superior para les\u00f5es planas,<\/li>\n\n\n\n<li>mais est\u00e1vel para operadores menos experientes.<\/li>\n<\/ul>\n\n\n\n<p>Enquanto aguardamos estudos internacionais maiores, o que j\u00e1 est\u00e1 claro \u00e9 que estamos entrando em uma nova era no tratamento endosc\u00f3pico das les\u00f5es do c\u00f3lon, onde a ferramenta mais importante pode n\u00e3o ser uma agulha, mas sim os princ\u00edpios b\u00e1sicos da f\u00edsica dos fluidos.<\/p>\n\n\n\n<p>Veja mais sobre o tema:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/mucosectomia-por-imersao-underwater-com-auxilio-de-cap-um-alternativa-para-casos-dificeis\/\">Mucosectomia underwater com aux\u00edlio de cap<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/video\/resseccao-de-lst-extensa-de-colon-ascendente-pela-tecnica-underwater-uemr\/\">Ressec\u00e7\u00e3o de les\u00e3o extensa de c\u00f3lon direito por UEMR<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/video\/2694\/\">Mucosectomia underwater de les\u00e3o de reto<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>Refer\u00eancia<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Tamaru Y, Miyakawa A, Shimura H, et al. Resection depth of underwater versus conventional endoscopic mucosal resection for intermediate-sized tumors.&nbsp;<em>Am J Gastroenterol&nbsp;<\/em>2026 Jan 9.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Como citar este artigo<\/strong><\/h2>\n\n\n\n<p class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background\">Orso IRB. Ser\u00e1 que UNDERWATER pode ser o futuro das ressec\u00e7\u00f5es de les\u00f5es de c\u00f3lon? Endoscopia Terap\u00eautica 2026 Vol I. Dispon\u00edvel em:&nbsp;<a href=\"https:\/\/endoscopiaterapeutica.net\/pt\/?p=21093\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/endoscopiaterapeutica.net\/pt\/assuntosgerais\/sera-que-underwater-pode-ser-o-futuro-das-resseccoes-de-lesoes-de-colon\/<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O padr\u00e3o atual para remo\u00e7\u00e3o de p\u00f3lipos m\u00e9dios (10\u201320 mm) \u00e9 Mucosectomia Convencional (EMR),&hellip;<\/p>\n","protected":false},"author":2464,"featured_media":21098,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[151],"tags":[849,777,346,861],"ano":[847],"tipo":[156],"volume":[263],"class_list":["post-21093","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-assuntosgerais","tag-emr","tag-mucosectomia","tag-polipos","tag-uemr","ano-847","tipo-colonoscopia","volume-volume-i"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Mucosectomia underwater (UEMR): o futuro para les\u00f5es do c\u00f3lon?<\/title>\n<meta name=\"description\" content=\"Mucosectomia underwater pode favorecer excis\u00f5es mais profundas no c\u00f3lon direito e em les\u00f5es planas, quando comparada \u00e0 EMR.\" \/>\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\/sera-que-mucosectomia-underwater-uemr-pode-ser-o-futuro-das-resseccoes-de-lesoes-de-colon\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ser\u00e1 que UNDERWATER pode ser o futuro das ressec\u00e7\u00f5es de les\u00f5es de c\u00f3lon?\" \/>\n<meta property=\"og:description\" content=\"O padr\u00e3o atual para remo\u00e7\u00e3o de p\u00f3lipos m\u00e9dios (10\u201320 mm) \u00e9 Mucosectomia Convencional (EMR), que depende da inje\u00e7\u00e3o de solu\u00e7\u00e3o salina para elevar a les\u00e3o.\" \/>\n<meta property=\"og:url\" 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