{"id":6899,"date":"2026-05-04T16:12:20","date_gmt":"2026-05-04T13:12:20","guid":{"rendered":"https:\/\/wiki.dev.voka.io\/glossary\/intervalle-lucide\/"},"modified":"2026-06-01T13:04:30","modified_gmt":"2026-06-01T10:04:30","slug":"intervalle-lucide","status":"publish","type":"glossary_item","link":"https:\/\/wiki.dev.voka.io\/fr\/glossaire\/intervalle-lucide\/","title":{"rendered":"Intervalle lucide"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Intervalle lucide (du latin <em>lucidus<\/em> \u2014 clair, lumineux et <em>intervallum<\/em> \u2014 pause, distance) est un ph\u00e9nom\u00e8ne clinique classique et extr\u00eamement insidieux, caract\u00e9ristique des traumatismes cr\u00e2niens graves. <\/p>\n\n<p class=\"wp-block-paragraph\">Il s&rsquo;agit d&rsquo;une p\u00e9riode de r\u00e9cup\u00e9ration temporaire, totale ou partielle de la conscience apr\u00e8s une perte initiale suite \u00e0 un coup, suivie d&rsquo;une d\u00e9t\u00e9rioration catastrophique de l&rsquo;\u00e9tat du patient.<\/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>\u00c9tiologie et physiopathologie<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">Ce ph\u00e9nom\u00e8ne est le plus typique de l&rsquo;h\u00e9matome \u00e9pidural aigu (rupture de l&rsquo;art\u00e8re m\u00e9ning\u00e9e moyenne). La pathogen\u00e8se se compose de deux processus parall\u00e8les. Au moment d&rsquo;un coup violent \u00e0 la t\u00eate, la personne subit une l\u00e9sion primaire de la formation r\u00e9ticulaire, provoquant une perte imm\u00e9diate de conscience.<\/p>\n\n<p class=\"wp-block-paragraph\">Au bout de peu de temps, le patient reprend connaissance, se rep\u00e8re dans l&rsquo;espace et se sent relativement bien. C&rsquo;est le d\u00e9but de l&rsquo;intervalle lucide. Cependant, en m\u00eame temps, le sang continue de couler des vaisseaux endommag\u00e9s et forme un h\u00e9matome. L&rsquo;enc\u00e9phale compense temporairement cette compression, en r\u00e9duisant le volume de liquide c\u00e9phalorachidien et de sang veineux \u00e0 l&rsquo;int\u00e9rieur du cr\u00e2ne.<\/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>Importance clinique<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">La dur\u00e9e de l&rsquo;intervalle lucide peut varier de quelques dizaines de minutes \u00e0 une journ\u00e9e. Son principal danger r\u00e9side dans le fait que le patient et les personnes environnantes sous-estiment la gravit\u00e9 du traumatisme. Le bless\u00e9 refuse souvent l&rsquo;hospitalisation, pensant qu&rsquo;il s&rsquo;agit simplement d&rsquo;une contusion.<\/p>\n\n<p class=\"wp-block-paragraph\">Une fois les espaces de r\u00e9serve du cr\u00e2ne combl\u00e9s, la compensation \u00e9choue brusquement. La pression intracr\u00e2nienne augmente de mani\u00e8re exponentielle. Chez le patient, sur fond de conscience claire, surviennent soudainement des c\u00e9phal\u00e9es intenses, des vomissements r\u00e9p\u00e9t\u00e9s, il devient agressif, puis sombre dans un coma profond. La pupille du c\u00f4t\u00e9 du coup se dilate, un paralysie de l&rsquo;h\u00e9micorps oppos\u00e9 appara\u00eet. La d\u00e9tection d&rsquo;un intervalle lucide dans l&rsquo;anamn\u00e8se (d&rsquo;apr\u00e8s les t\u00e9moins) est un signal absolu pour le m\u00e9decin urgentiste de la pr\u00e9sence d&rsquo;une pression intracr\u00e2nienne accrue sur fond d&rsquo;h\u00e9morragie intracr\u00e2nienne.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Intervalle lucide (du latin <em>lucidus<\/em> \u2014 clair, lumineux et <em>intervallum<\/em> \u2014 pause, distance) est un ph\u00e9nom\u00e8ne clinique classique et extr\u00eamement insidieux, caract\u00e9ristique des traumatismes cr\u00e2niens graves. <\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-6899","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>Intervalle lucide : d\u00e9finition m\u00e9dicale et description | Voka 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