{"id":19806,"date":"2026-10-26T00:37:10","date_gmt":"2026-10-26T00:37:10","guid":{"rendered":"https:\/\/endoscopiaterapeutica.net\/es\/?p=19806"},"modified":"2026-10-26T00:37:14","modified_gmt":"2026-10-26T00:37:14","slug":"sindrome-del-asa-aferente-revision-clinica-y-abordaje-endoscopico","status":"publish","type":"post","link":"https:\/\/endoscopiaterapeutica.net\/es\/casosclinicos\/sindrome-del-asa-aferente-revision-clinica-y-abordaje-endoscopico\/","title":{"rendered":"S\u00edndrome del asa aferente: revisi\u00f3n cl\u00ednica y abordaje endosc\u00f3pico"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"19806\" class=\"elementor elementor-19806\">\n\t\t\t\t\t\t<section class=\"penci-section penci-disSticky penci-structure-10 elementor-section elementor-top-section elementor-element elementor-element-5719e2cf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5719e2cf\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"penci-ercol-100 penci-ercol-order-1 penci-sticky-ct    elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-651455ec\" data-id=\"651455ec\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4d05d605 elementor-widget elementor-widget-text-editor\" data-id=\"4d05d605\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\n<p class=\"has-pale-ocean-gradient-background has-background wp-block-paragraph\"><strong>Autores:<\/strong> Ada Alexandrina Brom dos Santos Soares, Adrielma Athena Rodrigues Serr\u00e3o Martins e Silva, Paulo Sakai, Carlos Kiyoshi Furuya Junior, Bruno da Costa Martins<\/p>\n\n<h2 id=\"h-introduccion\" class=\"wp-block-heading\"><br \/><strong>Introducci\u00f3n<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">El s\u00edndrome del asa aferente (SAA) es una complicaci\u00f3n infrecuente derivada de la obstrucci\u00f3n mec\u00e1nica del asa aferente, con distensi\u00f3n secundaria a la acumulaci\u00f3n de bilis y secreciones pancreatoent\u00e9ricas (Fig. 1). Su incidencia var\u00eda de 0,2% a 1%, sobre todo tras reconstrucciones gastroeyeyunales de Billroth II o en Y-de-Roux, as\u00ed como tras duodenopancreatectom\u00eda.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/endoscopiaterapeutica.net\/es\/?attachment_id=19807\"><img fetchpriority=\"high\" decoding=\"async\" width=\"301\" height=\"609\" class=\"wp-image-19807\" src=\"https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/reconstruccion-billroth.png\" alt=\"\" srcset=\"https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/reconstruccion-billroth.png 301w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/reconstruccion-billroth-148x300.png 148w\" sizes=\"(max-width: 301px) 100vw, 301px\" \/><\/a>\n<figcaption class=\"wp-element-caption\"><br \/><strong>Fig. 1:<\/strong> Ilustraci\u00f3n esquem\u00e1tica de reconstrucci\u00f3n gastroeyeyunal de Billroth II, evidenciando obstrucci\u00f3n pr\u00f3xima a la anastomosis (flecha azul), con dilataci\u00f3n del asa aferente y acumulaci\u00f3n de contenido biliopancre\u00e1tico.<\/figcaption>\n<\/figure>\n<\/div>\n<h2 id=\"h-etiologia\" class=\"wp-block-heading\"><br \/><strong>Etiolog\u00eda<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">Las etiolog\u00edas benignas incluyen causas intraluminales, intramurales y extr\u00ednsecas, destac\u00e1ndose la enteritis por radiaci\u00f3n, la torsi\u00f3n del asa aferente, las adherencias posoperatorias, la hernia interna, el v\u00f3lvulo y la intuscepci\u00f3n. Entre las etiolog\u00edas malignas, predominan la carcinomatosis peritoneal y la recurrencia tumoral locorregional.<\/p>\n\n<h2 id=\"h-cuadro-clinico\" class=\"wp-block-heading\"><br \/><strong>Cuadro cl\u00ednico<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">La obstrucci\u00f3n completa generalmente se manifiesta de forma aguda, con dolor epig\u00e1strico, frecuentemente irradiado a la regi\u00f3n interescapular, asociado a v\u00f3mitos no biliosos. La acumulaci\u00f3n de secreciones promueve el aumento de la presi\u00f3n intraluminal, con posible evoluci\u00f3n a pancreatitis y colangitis ascendente. En los casos m\u00e1s graves, puede ocurrir isquemia intestinal, seguida de perforaci\u00f3n y peritonitis.<\/p>\n\n<p class=\"wp-block-paragraph\">La obstrucci\u00f3n parcial presenta un curso cr\u00f3nico, caracterizado por malestar periumbilical posprandial. La estasis de secreciones favorece el sobrecrecimiento bacteriano, con evoluci\u00f3n a desnutrici\u00f3n, deficiencia de vitamina B12\u00a0y esteatorrea, y la descompresi\u00f3n s\u00fabita del asa aferente resulta en v\u00f3mitos biliosos en chorro.<\/p>\n\n<h2 id=\"h-diagnostico\" class=\"wp-block-heading\"><br \/><strong>Diagn\u00f3stico<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">La tomograf\u00eda computarizada abdominal constituye el principal m\u00e9todo diagn\u00f3stico de la SAA, permitiendo confirmar la obstrucci\u00f3n, definir su etiolog\u00eda e identificar las complicaciones asociadas. Los principales hallazgos tomogr\u00e1ficos incluyen dilataci\u00f3n del asa aferente que atraviesa la l\u00ednea media entre la aorta y la arteria mesent\u00e9rica superior; proyecci\u00f3n de las v\u00e1lvulas coniventes hacia la luz; engrosamiento de la pared intestinal o lesi\u00f3n obstructiva en la anastomosis; dilataci\u00f3n de la v\u00eda pancreatobiliar (Fig. 2); linfadenopat\u00eda, ascitis, realce peritoneal y lesiones metast\u00e1sicas.<\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/endoscopiaterapeutica.net\/es\/?attachment_id=19808\"><img decoding=\"async\" width=\"1002\" height=\"1024\" class=\"wp-image-19808\" src=\"https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tomografia-computarizada-demostrando-dilatacion-de-la-via-biliar-y-del-ducto-pancreatico-1002x1024.png\" alt=\"\" srcset=\"https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tomografia-computarizada-demostrando-dilatacion-de-la-via-biliar-y-del-ducto-pancreatico-1002x1024.png 1002w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tomografia-computarizada-demostrando-dilatacion-de-la-via-biliar-y-del-ducto-pancreatico-293x300.png 293w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tomografia-computarizada-demostrando-dilatacion-de-la-via-biliar-y-del-ducto-pancreatico-768x785.png 768w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tomografia-computarizada-demostrando-dilatacion-de-la-via-biliar-y-del-ducto-pancreatico-585x598.png 585w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tomografia-computarizada-demostrando-dilatacion-de-la-via-biliar-y-del-ducto-pancreatico.png 1024w\" sizes=\"(max-width: 1002px) 100vw, 1002px\" \/><\/a>\n<figcaption class=\"wp-element-caption\"><br \/><strong>Fig. 2:<\/strong> Tomograf\u00eda computarizada demostrando dilataci\u00f3n de la v\u00eda biliar y del ducto pancre\u00e1tico, asociada a acentuada distensi\u00f3n del duodeno y yeyuno proximal hasta pr\u00f3ximo de la anastomosis gastroent\u00e9rica.<\/figcaption>\n<\/figure>\n\n<h2 id=\"h-tratamiento\" class=\"wp-block-heading\"><br \/><strong>Tratamiento<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">La cirug\u00eda permanece como el principal tratamiento para la SAA. Sin embargo, los avances en las intervenciones endosc\u00f3picas ampliaron las opciones terap\u00e9uticas m\u00ednimamente invasivas. Los abordajes endosc\u00f3picos incluyen la dilataci\u00f3n con bal\u00f3n del \u00e1rea estenosada, el drenaje del segmento obstruido con sonda nasog\u00e1strica, la colocaci\u00f3n de stents met\u00e1licos autoexpandibles por enteroscopia y la creaci\u00f3n de una anastomosis entre el segmento dilatado y la luz g\u00e1strica o yeyunal por ecoendoscopia, con utilizaci\u00f3n de pr\u00f3tesis met\u00e1lica de aposici\u00f3n luminal (LAMS) (Fig. 3). Estudios multic\u00e9ntricos iniciales demuestran elevadas tasas de \u00e9xito t\u00e9cnico y cl\u00ednico de este abordaje.<\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/endoscopiaterapeutica.net\/es\/?attachment_id=19809\"><img decoding=\"async\" width=\"1024\" height=\"354\" class=\"wp-image-19809\" src=\"https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tratamiento-ecoendoscopico-de-la-SAA-con-colocacion-de-LAMS-1024x354.png\" alt=\"\" srcset=\"https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tratamiento-ecoendoscopico-de-la-SAA-con-colocacion-de-LAMS-1024x354.png 1024w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tratamiento-ecoendoscopico-de-la-SAA-con-colocacion-de-LAMS-300x104.png 300w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tratamiento-ecoendoscopico-de-la-SAA-con-colocacion-de-LAMS-768x266.png 768w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tratamiento-ecoendoscopico-de-la-SAA-con-colocacion-de-LAMS-1170x405.png 1170w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tratamiento-ecoendoscopico-de-la-SAA-con-colocacion-de-LAMS-585x203.png 585w, https:\/\/endoscopiaterapeutica.net\/es\/wp-content\/uploads\/2026\/10\/Tratamiento-ecoendoscopico-de-la-SAA-con-colocacion-de-LAMS.png 1193w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a>\n<figcaption class=\"wp-element-caption\"><br \/><strong>Fig. 3:<\/strong> Tratamiento ecoendosc\u00f3pico de la SAA con colocaci\u00f3n de LAMS. La ilustraci\u00f3n A presenta el posicionamiento del ecoendoscopio en el asa eferente para punci\u00f3n. La imagen ecoendosc\u00f3pica B demuestra la realizaci\u00f3n de la enteroenteroanastomosis por punci\u00f3n, con colocaci\u00f3n de la LAMS. La ilustraci\u00f3n C esquematiza la pr\u00f3tesis comunicando las dos asas. La imagen endosc\u00f3pica D evidencia el adecuado posicionamiento de la pr\u00f3tesis, con buena drenaje del contenido biliopancre\u00e1tico.<\/figcaption>\n<\/figure>\n\n<p class=\"wp-block-paragraph\">A continuaci\u00f3n, presentamos un v\u00eddeo del tratamiento endosc\u00f3pico de la SAA con LAMS mediante anastomosis enteroent\u00e9rica guiada por ecoendoscopia.<\/p>\n\n<div style=\"position: relative; padding-top: 56.25%;\"><iframe id=\"panda-6cd1369a-4c9c-4f78-9553-8ecaf7fa722c\" style=\"border: none; position: absolute; top: 0; left: 0;\" src=\"https:\/\/player-vz-a75e9d45-986.tv.pandavideo.com.br\/embed\/?v=6cd1369a-4c9c-4f78-9553-8ecaf7fa722c\" width=\"100%\" height=\"100%\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/div>\n\n<h2 id=\"h-referencias\" class=\"wp-block-heading\"><br \/><strong>Referencias<\/strong><\/h2>\n\n<ol class=\"wp-block-list\">\n<li>Grotewiel RK, Cindass R. Afferent loop syndrome. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023.<\/li>\n\n<li>Termsinsuk P, Chantarojanasiri T, Pausawasdi N. Diagnosis and treatment of the afferent loop syndrome. Clin J Gastroenterol. 2020;13(5):660-668. doi:10.1007\/s12328-020-01170-z.<\/li>\n\n<li>Wu CCH, Brindise E, Abiad RE, Khashab MA. The role of endoscopic management in afferent loop syndrome. Gut Liver. 2023;17(3):351-359. doi:10.5009\/gnl220205.<\/li>\n<\/ol>\n\n<h2 id=\"h-como-citar-este-articulo\" class=\"wp-block-heading\"><strong>Como citar este articulo<\/strong><\/h2>\n\n<p class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background wp-block-paragraph\">Soares AABS, Silva AARSM, Sakai P, Junior CKF, Martins BC, Penaloza CSQ. S\u00edndrome del asa aferente: revisi\u00f3n cl\u00ednica y abordaje endosc\u00f3pico. Endoscopia Terapeutica 2026, Vol II. Disponible en: <a href=\"https:\/\/endoscopiaterapeutica.net\/es\/?p=19806\" target=\"_blank\" rel=\"noopener\">https:\/\/endoscopiaterapeutica.net\/es\/casosclinicos\/sindrome-del-asa-aferente-revision-clinica-y-abordaje-endoscopico\/<\/a><\/p>\n\n<p class=\"wp-block-paragraph\">\u00a0<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Autores: Ada Alexandrina Brom dos Santos Soares, Adrielma Athena Rodrigues Serr\u00e3o Martins e Silva,&hellip;<\/p>\n","protected":false},"author":712,"featured_media":19807,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[150,151],"tags":[],"ano":[751],"tipo":[],"volume":[147],"class_list":["post-19806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-casosclinicos","category-temas-generales","ano-751","volume-volumen-ii"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>S\u00edndrome del asa aferente: revisi\u00f3n cl\u00ednica y abordaje endosc\u00f3pico &#8226; 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