{"id":6881,"date":"2026-05-04T16:12:14","date_gmt":"2026-05-04T13:12:14","guid":{"rendered":"https:\/\/wiki.dev.voka.io\/glossary\/hemorragia-subaracnoidea-traumatica\/"},"modified":"2026-06-01T13:05:32","modified_gmt":"2026-06-01T10:05:32","slug":"hemorragia-subaracnoidea-traumatica","status":"publish","type":"glossary_item","link":"https:\/\/wiki.dev.voka.io\/pt\/glossario\/hemorragia-subaracnoidea-traumatica\/","title":{"rendered":"Hemorragia subaracnoidea traum\u00e1tica"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Hemorragia subaracnoidea traum\u00e1tica (do latim <em>sub-<\/em> \u2014 sob e do grego <em>arachne<\/em> \u2014 teia, <em>haima<\/em> \u2014 sangue) \u00e9 uma patol\u00f3gica acumula\u00e7\u00e3o de sangue extravasado no espa\u00e7o entre as meninges mole e aracnoide. <\/p>\n\n<p class=\"wp-block-paragraph\">Esta condi\u00e7\u00e3o ocorre como resultado de trauma mec\u00e2nico na cabe\u00e7a e \u00e9 uma das consequ\u00eancias mais comuns de uma contus\u00e3o cerebral.<\/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\">Normalmente, o espa\u00e7o subaracnoideo \u00e9 preenchido com l\u00edquido cefalorraquidiano claro, circulando ao redor do c\u00e9rebro. Um forte impacto, fric\u00e7\u00e3o do tecido cerebral contra proemin\u00eancias \u00f3sseas do cr\u00e2nio ou contus\u00e3o do c\u00f3rtex provoca ruptura de pequenos vasos sangu\u00edneos piares superficiais.<\/p>\n\n<p class=\"wp-block-paragraph\">O sangue sob press\u00e3o entra no espa\u00e7o subaracnoideo, mistura-se com o l\u00edquor e rapidamente se espalha pelas sulcos e cisternas basais do c\u00e9rebro. Diferente de sangramentos espont\u00e2neos (que ocorrem devido a ruptura de aneurisma), o tipo traum\u00e1tico sempre \u00e9 acompanhado por danos mec\u00e2nicos prim\u00e1rios no pr\u00f3prio tecido cerebral. Os produtos de degrada\u00e7\u00e3o dos eritr\u00f3citos exercem um potente efeito qu\u00edmico irritante sobre as meninges e causam inflama\u00e7\u00e3o ass\u00e9ptica aguda.<\/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\">O quadro cl\u00ednico caracteriza-se por dor de cabe\u00e7a intoler\u00e1vel, fotofobia e v\u00f4mitos repetidos. Desenvolve-se rapidamente a chamada s\u00edndrome men\u00edngea, cujo principal sinal \u00e9 a rigidez acentuada (tens\u00e3o) dos m\u00fasculos da nuca \u2014 o paciente fisicamente n\u00e3o consegue encostar o queixo no peito.<\/p>\n\n<p class=\"wp-block-paragraph\">Esta condi\u00e7\u00e3o n\u00e3o requer remo\u00e7\u00e3o cir\u00fargica do sangue em si, pois ele est\u00e1 difusamente espalhado sobre o c\u00e9rebro. No entanto, \u00e9 perigoso por complica\u00e7\u00f5es graves tardias. Co\u00e1gulos de sangue podem obstruir os caminhos de drenagem do l\u00edquor, causando hidrocefalia p\u00f3s-traum\u00e1tica (edema cerebral). Al\u00e9m disso, o efeito qu\u00edmico do sangue nas grandes art\u00e9rias da base do c\u00e9rebro frequentemente provoca seu espasmo persistente (vasoespasmo), o que leva a acidente vascular encef\u00e1lico isqu\u00eamico secund\u00e1rio alguns dias ap\u00f3s a les\u00e3o.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hemorragia subaracnoidea traum\u00e1tica (do latim <em>sub-<\/em> \u2014 sob e do grego <em>arachne<\/em> \u2014 teia, <em>haima<\/em> \u2014 sangue) \u00e9 uma patol\u00f3gica acumula\u00e7\u00e3o de sangue extravasado no espa\u00e7o entre as meninges mole e aracnoide. <\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-6881","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 v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hemorragia subaracnoidea traum\u00e1tica: defini\u00e7\u00e3o m\u00e9dica e 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