{"id":7172,"date":"2026-06-01T13:04:04","date_gmt":"2026-06-01T10:04:04","guid":{"rendered":"https:\/\/wiki.voka.io\/glossary\/espaco-subdural\/"},"modified":"2026-06-23T16:06:25","modified_gmt":"2026-06-23T13:06:25","slug":"espaco-subdural","status":"publish","type":"glossary_item","link":"https:\/\/wiki.voka.io\/pt\/glossario\/espaco-subdural\/","title":{"rendered":"Espa\u00e7o subdural"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">O espa\u00e7o subdural (do latim <em>sub-<\/em> \u2014 abaixo e <em>dura<\/em> \u2014 dura-m\u00e1ter) \u00e9 um potencial espa\u00e7o fissural anat\u00f4mico na cavidade craniana. Est\u00e1 situado entre a superf\u00edcie interna da dura-m\u00e1ter e a superf\u00edcie externa da aracnoide.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x44D;&#x442;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;-&#x438;-&#x43F;&#x430;&#x442;&#x43E;&#x444;&#x438;&#x437;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;\"><strong>Etiologia e fisiopatologia<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">No organismo saud\u00e1vel, esse espa\u00e7o n\u00e3o existe de fato. Ambas as membranas s\u00e3o absolutamente lisas e est\u00e3o firmemente aderidas uma \u00e0 outra. Entre elas, existe apenas uma fina pel\u00edcula capilar que evita o atrito das membranas durante a pulsa\u00e7\u00e3o do c\u00e9rebro.<\/p>\n\n<p class=\"wp-block-paragraph\">Entretanto, n\u00e3o existem entre essas membranas pontes de tecidos conjuntivos r\u00edgidas ou ades\u00f5es. Portanto, em caso de ruptura traum\u00e1tica dos vasos, o sangue (ou l\u00edquido) derramado facilmente as separa. A massa patol\u00f3gica atua como uma cunha hidr\u00e1ulica, separando as membranas e criando uma cavidade extensa.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x43A;&#x43B;&#x438;&#x43D;&#x438;&#x447;&#x435;&#x441;&#x43A;&#x43E;&#x435;-&#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x435;\"><strong>Import\u00e2ncia cl\u00ednica<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">\u00c9 nesse espa\u00e7o dissociado que se formam as patologias traum\u00e1ticas mais perigosas: hematomas subdurais (ac\u00famulo de sangue venoso) e higromas subdurais (ac\u00famulo de l\u00edquido cefalorraquidiano).<\/p>\n\n<p class=\"wp-block-paragraph\">A caracter\u00edstica cl\u00ednica mais importante desse espa\u00e7o \u00e9 sua continuidade. Devido a isso, o sangue extravasado n\u00e3o se acumula como um co\u00e1gulo local, mas se espalha livremente por toda a superf\u00edcie do hemisf\u00e9rio em uma camada fina, em forma de foice ou crescente. Isso resulta em compress\u00e3o extensa e grave de todo o c\u00f3rtex cerebral.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>O espa\u00e7o subdural (do latim <em>sub-<\/em> \u2014 abaixo e <em>dura<\/em> \u2014 dura-m\u00e1ter) \u00e9 um potencial espa\u00e7o fissural anat\u00f4mico na cavidade craniana. Est\u00e1 situado entre a superf\u00edcie interna da dura-m\u00e1ter e a superf\u00edcie externa da aracnoide.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-7172","glossary_item","type-glossary_item","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Espa\u00e7o subdural: defini\u00e7\u00e3o m\u00e9dica e vis\u00e3o geral | Voka Wiki<\/title>\n<meta name=\"description\" content=\"O espa\u00e7o subdural (do latim sub- \u2014 abaixo e dura \u2014 dura-m\u00e1ter) \u00e9 um potencial espa\u00e7o fissural anat\u00f4mico na cavidade craniana. 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