{"id":4895,"date":"2026-03-16T13:02:08","date_gmt":"2026-03-16T10:02:08","guid":{"rendered":"https:\/\/wiki.voka.io\/glossary\/laminectomie\/"},"modified":"2026-04-01T18:37:27","modified_gmt":"2026-04-01T15:37:27","slug":"laminectomie","status":"publish","type":"glossary_item","link":"https:\/\/wiki.voka.io\/fr\/glossary\/laminectomie\/","title":{"rendered":"Laminectomie"},"content":{"rendered":"\n<p>La laminectomie (du lat. <em>lamina<\/em> \u2014 plaque et du grec <em>ectomie<\/em> \u2014 excision, ablation) est une intervention neurochirurgicale sur la colonne vert\u00e9brale consistant en l&rsquo;excision compl\u00e8te de l&rsquo;arc vert\u00e9bral.<\/p>\n\n<p>L&rsquo;objectif principal de cette intervention est l&rsquo;expansion physique du canal rachidien pour soulager la compression critique de la moelle spinale ou des racines nerveuses qui en d\u00e9rivent.<\/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>Anatomiquement, l&rsquo;arc osseux recouvre la moelle spinale par derri\u00e8re, assurant ainsi une fonction protectrice essentielle. Cependant, lors de traumatismes s\u00e9v\u00e8res (fractures par \u00e9clats avec d\u00e9placement) ou de maladies d\u00e9g\u00e9n\u00e9ratives, l&rsquo;espace \u00e0 l&rsquo;int\u00e9rieur du canal rachidien peut se r\u00e9tr\u00e9cir brusquement. Dans la pathogen\u00e8se de la st\u00e9nose, une hypertrophie compensatoire du ligament jaune adjacent se produit \u00e9galement.<\/p>\n\n<p>Au cours de l&rsquo;op\u00e9ration, le chirurgien retire le processus \u00e9pineux ainsi que les deux plaques osseuses de l&rsquo;arc vert\u00e9bral jusqu&rsquo;aux processus articulaires. Cela cr\u00e9e une large \u00ab\u00a0fen\u00eatre de d\u00e9compression\u00a0\u00bb pour le sac dural. Suite \u00e0 l&rsquo;intervention, la circulation normale du liquide c\u00e9phalorachidien et un approvisionnement art\u00e9riel ad\u00e9quat de la mati\u00e8re nerveuse isch\u00e9mique sont imm\u00e9diatement restaur\u00e9s.<\/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>La laminectomie est le standard d&rsquo;excellence pour la chirurgie d&rsquo;urgence dans le cadre de syndromes de compression aigus, comme lors de la formation d&rsquo;un h\u00e9matome \u00e9pidural post-traumatique. Il est \u00e9galement effectu\u00e9 pour obtenir un acc\u00e8s chirurgical direct \u00e0 la moelle spinale lors de l&rsquo;ablation de tumeurs intram\u00e9dullaires.<\/p>\n\n<p>Malgr\u00e9 son efficacit\u00e9 clinique \u00e9lev\u00e9e de pr\u00e9servation des fonctions nerveuses, l&rsquo;ablation compl\u00e8te du complexe de soutien post\u00e9rieur entra\u00eene in\u00e9vitablement une diminution de la stabilit\u00e9 biom\u00e9canique du segment vert\u00e9bral. Pour cette raison, en traumatologie moderne, la laminectomie est presque toujours compl\u00e9t\u00e9e par une \u00e9tape stabilisatrice appel\u00e9e spondylod\u00e8se transpediculaire (fixation des vert\u00e8bres par des vis en titane).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La laminectomie (du lat. <em>lamina<\/em> \u2014 plaque et du grec <em>ectomie<\/em> \u2014 excision, ablation) est une intervention neurochirurgicale sur la colonne vert\u00e9brale consistant en l&rsquo;excision compl\u00e8te de l&rsquo;arc vert\u00e9bral.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-4895","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>Laminectomie : d\u00e9finition m\u00e9dicale et description | Voka Wiki<\/title>\n<meta name=\"description\" content=\"La 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