{"id":16143,"date":"2018-08-17T12:10:09","date_gmt":"2018-08-17T12:10:09","guid":{"rendered":"https:\/\/www.elza-institute.com\/?p=13437"},"modified":"2020-10-02T15:57:46","modified_gmt":"2020-10-02T15:57:46","slug":"cross-linking-thin-cornea-keratoconus","status":"publish","type":"post","link":"https:\/\/www.elza-institute.com\/pt\/cross-linking-thin-cornea-keratoconus\/","title":{"rendered":"Cross-Linking em c\u00f3rneas finas: simples, pessoal e mais preciso"},"content":{"rendered":"<p>O ceratocone \u00e9 o afinamento progressivo da c\u00f3rnea, e o reticulado da c\u00f3rnea (CXL) pode ser tratado com sucesso. A aplica\u00e7\u00e3o de riboflavina e de luz UV na c\u00f3rnea gera radicais livres altamente reactivos que reticulam as mol\u00e9culas da c\u00f3rnea (principalmente o colag\u00e9nio), endurecendo-a e fortalecendo-a, o que permite retardar ou parar a progress\u00e3o da doen\u00e7a.<\/p>\n<p>Mas com o CXL, as c\u00f3rneas finas - frequentemente as c\u00f3rneas que mais necessitam de tratamento - podem causar grandes dores de cabe\u00e7a. H\u00e1 uma boa raz\u00e3o para que o protocolo padr\u00e3o de Dresden para CXL seja limitado a c\u00f3rneas com uma espessura &gt;400 \u00b5m. As c\u00f3rneas mais finas correm o risco de a luz UV penetrar mais profundamente e danificar as c\u00e9lulas endoteliais na base da c\u00f3rnea. Como estas c\u00e9lulas n\u00e3o se podem regenerar, os cirurgi\u00f5es que realizam o CXL tiveram de encontrar formas de tornar estas c\u00f3rneas finas temporariamente mais espessas (por exemplo, inchando a c\u00f3rnea com riboflavina hipo-osmolar ou aplicando uma lente de contacto na c\u00f3rnea). Estes m\u00e9todos complicam certamente o procedimento e acrescentam tamb\u00e9m um elemento de incerteza. N\u00e3o tem de ser assim.<\/p>\n<p>O nosso trabalho de investiga\u00e7\u00e3o permitiu-nos construir um modelo validado da forma como os quatro componentes principais da t\u00e9cnica CXL (energia UV, tempo de irradia\u00e7\u00e3o UV, concentra\u00e7\u00e3o de riboflavina e press\u00e3o de oxig\u00e9nio) interagem para endurecer a c\u00f3rnea. Isto permite-nos determinar n\u00e3o s\u00f3 o efeito de endurecimento de qualquer combina\u00e7\u00e3o dos componentes principais do CXL, mas tamb\u00e9m a profundidade dos efeitos do CXL utilizando irradia\u00e7\u00e3o UV personalizada. Por outras palavras, pode ser utilizado um perfil de ilumina\u00e7\u00e3o UV personalizado - com um tempo de irradia\u00e7\u00e3o mais curto - para tratar c\u00f3rneas mais finas, adaptado ao olho de cada doente, simplificando e acelerando o tratamento de c\u00f3rneas finas com CXL.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-medium wp-image-13438\" src=\"https:\/\/www.elza-institute.com\/wp-content\/uploads\/2020\/10\/CRST-Individualizing-CXL-image-237x300-1.jpg\" alt=\"CRST Individualiza\u00e7\u00e3o da imagem CXL\" width=\"237\" height=\"300\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>O ceratocone \u00e9 o afinamento progressivo da c\u00f3rnea, e o reticulado da c\u00f3rnea (CXL) pode ser tratado com sucesso.<\/p>","protected":false},"author":4,"featured_media":16148,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[214,96,215],"tags":[125,130,100,123,119],"class_list":["post-16143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-farhad-hafezi","category-popular-press","category-sabine-kling","tag-cornea","tag-cross-linking","tag-cxl","tag-keratoconus","tag-thin-corneas"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>My keratoconus cornea is too thin for CXL: Cross-Linking thin cornea<\/title>\n<meta name=\"description\" content=\"Cross-Linking thin cornea: personalized cross-linking is currently being developed at ELZA and will allow for the treatment of extremely thin corneas.\" \/>\n<meta name=\"robots\" content=\"index, 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