{"id":6586,"date":"2026-04-16T13:54:15","date_gmt":"2026-04-16T10:54:15","guid":{"rendered":"https:\/\/wiki.dev.voka.io\/glossary\/hematome-sous-galeal\/"},"modified":"2026-04-28T09:29:44","modified_gmt":"2026-04-28T06:29:44","slug":"hematome-sous-galeal","status":"publish","type":"glossary_item","link":"https:\/\/wiki.dev.voka.io\/fr\/glossaire\/hematome-sous-galeal\/","title":{"rendered":"H\u00e9matome sous-gal\u00e9al"},"content":{"rendered":"\n<p>L&rsquo;h\u00e9matome sous-gal\u00e9al (du latin <em>sub-<\/em> \u2014 sous, <em>galea<\/em> \u2014 casque et du grec <em>haematoma<\/em> \u2014 tumeur sanguine) est une importante accumulation pathologique de sang liquide dans l&rsquo;espace de tissu conjonctif l\u00e2che situ\u00e9 strictement entre l&rsquo;apon\u00e9vrose tendineuse et le p\u00e9rioste du cr\u00e2ne.<\/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>Cet espace cellulaire (couche \u00ab L \u00bb de la structure du cuir chevelu) est totalement libre. Il ne contient pas de septums fascials ou de barri\u00e8res, de sorte qu&rsquo;il couvre anatomiquement toute la vo\u00fbte cr\u00e2nienne, des arcades sourcili\u00e8res \u00e0 l&rsquo;avant jusqu&rsquo;\u00e0 la ligne nucale sup\u00e9rieure \u00e0 l&rsquo;arri\u00e8re.<\/p>\n\n<p>L&rsquo;h\u00e9morragie dans cette zone se produit le plus souvent lors d&rsquo;un coup tangent \u00e0 la t\u00eate, d&rsquo;un traumatisme par traction (par exemple, saisie des cheveux) ou lors de l&rsquo;utilisation d&rsquo;un extracteur \u00e0 vide lors d&rsquo;un accouchement compliqu\u00e9. La source de l&rsquo;h\u00e9morragie massive est constitu\u00e9e par des veines \u00e9missaires endommag\u00e9es \u2014 des vaisseaux traversant les os du cr\u00e2ne et connectant les tissus ext\u00e9rieurs aux sinus veineux intracr\u00e2niens.<\/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>En raison de l&rsquo;absence de limitations anatomiques, l&rsquo;h\u00e9matome sous-gal\u00e9al est capable de contenir un volume de sang colossal. Chez les adultes, le volume d&rsquo;h\u00e9morragie peut atteindre plusieurs centaines de millilitres, alors que chez les nouveau-n\u00e9s, la perte de sang dans cet espace peut rapidement entra\u00eener un choc h\u00e9morragique mena\u00e7ant le pronostic vital.<\/p>\n\n<p>Visuellement, l&rsquo;h\u00e9matome s&rsquo;\u00e9tend sur toute la t\u00eate. Sous l&rsquo;effet de la gravit\u00e9, le sang descend souvent vers la r\u00e9gion du visage, formant de vastes h\u00e9morragies secondaires autour des yeux (sympt\u00f4me des \u00ab\u00a0yeux de raton laveur\u00a0\u00bb). \u00c0 la palpation, un sympt\u00f4me fluctuant prononc\u00e9 est d\u00e9termin\u00e9 \u2014 un mouvement ondulatoire du liquide sous les doigts. Contrairement au c\u00e9phaloh\u00e9matome, la collection sanguine sous-gal\u00e9al traverse librement les lignes de suture cr\u00e2niennes. Le traitement n\u00e9cessite une surveillance stricte, un contr\u00f4le des param\u00e8tres sanguins et, dans de rares cas, l&rsquo;\u00e9vacuation du liquide par ponction.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;h\u00e9matome sous-gal\u00e9al (du latin <em>sub-<\/em> \u2014 sous, <em>galea<\/em> \u2014 casque et du grec <em>haematoma<\/em> \u2014 tumeur sanguine) est une importante accumulation pathologique de sang liquide dans l&rsquo;espace de tissu conjonctif l\u00e2che situ\u00e9 strictement entre l&rsquo;apon\u00e9vrose tendineuse et le p\u00e9rioste du cr\u00e2ne.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-6586","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>H\u00e9matome sous-gal\u00e9al : d\u00e9finition m\u00e9dicale et description | 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