{"id":2840,"date":"2026-09-03T11:56:43","date_gmt":"2026-09-03T10:56:43","guid":{"rendered":"https:\/\/www.laurensoff.com\/wordpress\/?p=2840"},"modified":"2026-09-03T11:56:43","modified_gmt":"2026-09-03T10:56:43","slug":"sante-pourquoi-fait-on-des-analyses-de-sang","status":"publish","type":"post","link":"https:\/\/www.laurensoff.com\/wordpress\/sante-pourquoi-fait-on-des-analyses-de-sang\/","title":{"rendered":"Sant\u00e9 : Pourquoi fait-on des analyses de sang ?"},"content":{"rendered":"<p>L&rsquo;analyse de sang (ou bilan sanguin) est l&rsquo;un des examens m\u00e9dicaux les plus courants et les plus r\u00e9v\u00e9lateurs.<\/p>\n<p>Le sang circule dans tout le corps pour apporter l&rsquo;oxyg\u00e8ne et les nutriments aux organes, ce qui en fait un indicateur direct de l&rsquo;\u00e9tat de sant\u00e9 g\u00e9n\u00e9ral.<\/p>\n<h2 data-path-to-node=\"2\">Pourquoi fait-on des analyses de sang ?<\/h2>\n<p data-path-to-node=\"3\">Les objectifs principaux d&rsquo;un examen sanguin se divisent en quatre grandes cat\u00e9gories :<\/p>\n<ul data-path-to-node=\"4\">\n<li>\n<p data-path-to-node=\"4,0,0\"><b data-path-to-node=\"4,0,0\" data-index-in-node=\"0\">Le d\u00e9pistage et la pr\u00e9vention :<\/b> V\u00e9rifier l&rsquo;\u00e9tat de sant\u00e9 g\u00e9n\u00e9ral lors d&rsquo;un bilan de routine, m\u00eame en l&rsquo;absence de sympt\u00f4mes (recherche d&rsquo;an\u00e9mie, de cholest\u00e9rol, de diab\u00e8te).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,1,0\"><b data-path-to-node=\"4,1,0\" data-index-in-node=\"0\">Le diagnostic :<\/b> Identifier la cause de sympt\u00f4mes pr\u00e9cis (fatigue persistante, fi\u00e8vre, douleurs, perte de poids).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,2,0\"><b data-path-to-node=\"4,2,0\" data-index-in-node=\"0\">Le suivi de traitement :<\/b> Mesurer l&rsquo;efficacit\u00e9 d&rsquo;un m\u00e9dicament (comme un traitement contre le cholest\u00e9rol ou la thyro\u00efde) ou v\u00e9rifier l&rsquo;absence d&rsquo;effets secondaires toxiques (sur le foie ou les reins).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,3,0\"><b data-path-to-node=\"4,3,0\" data-index-in-node=\"0\">L&rsquo;urgence m\u00e9dicale :<\/b> \u00c9valuer rapidement la gravit\u00e9 d&rsquo;une situation (infection s\u00e9v\u00e8re, crise cardiaque, h\u00e9morragie).<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"6\">Comment se d\u00e9roule l&rsquo;examen ?<\/h2>\n<p data-path-to-node=\"7\">Le processus suit une cha\u00eene stricte, de la pr\u00e9paration au laboratoire jusqu&rsquo;\u00e0 l&rsquo;obtention des r\u00e9sultats.<\/p>\n<div class=\"attachment-container unknown\">\n<div class=\"sequence-container\" data-hveid=\"0\" data-ved=\"0CAAQse0SahgKEwjv-sKHntKWAxUAAAAAHQAAAAAQiwE\">\n<div class=\"sequence-event ng-star-inserted\">\n<div class=\"sequence-event-content\">\n<div class=\"sequence-event-description gds-body-l\"><span class=\"only-show-to-message-actions\" data-test-id=\"sequence-export-header\"><strong>1.La pr\u00e9paration\u00a0:<\/strong>\u00c0 jeun ou non selon l&rsquo;ordonnance.<\/span><\/p>\n<p class=\"ng-star-inserted\">Certains dosages (glyc\u00e9mie, bilan lipidique) n\u00e9cessitent d&rsquo;\u00eatre \u00e0 jeun depuis 8 \u00e0 12 heures. Il reste toutefois permis de boire de l&rsquo;eau.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"sequence-event ng-star-inserted\">\n<div class=\"sequence-event-content\">\n<div class=\"sequence-event-description gds-body-l\"><span class=\"only-show-to-message-actions\" data-test-id=\"sequence-export-header\"><strong>2.Le pr\u00e9l\u00e8vement (ponction veineuse)\u00a0:<\/strong><\/span><\/p>\n<p class=\"ng-star-inserted\">Un professionnel de sant\u00e9 pose un garrot au-dessus du coude pour faire gonfler la veine, d\u00e9sinfecte la peau, puis ins\u00e8re une fine aiguille. Le sang est aspir\u00e9 directement dans un ou plusieurs tubes sous vide.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"sequence-event ng-star-inserted\">\n<div class=\"sequence-event-content\">\n<div class=\"sequence-event-description gds-body-l\"><span class=\"only-show-to-message-actions\" data-test-id=\"sequence-export-header\"><strong>3.Le tri et le conditionnement\u00a0:<\/strong><\/span><\/p>\n<p class=\"ng-star-inserted\">Chaque tube poss\u00e8de une couleur de bouchon sp\u00e9cifique qui indique la pr\u00e9sence d&rsquo;un additif particulier (anticoagulant, acc\u00e9l\u00e9rateur de coagulation, etc.) selon le type d&rsquo;analyse demand\u00e9.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"sequence-event ng-star-inserted\">\n<div class=\"sequence-event-content\">\n<div class=\"sequence-event-description gds-body-l\"><span class=\"only-show-to-message-actions\" data-test-id=\"sequence-export-header\"><strong>4.L&rsquo;analyse en laboratoire\u00a0:<\/strong><\/span><\/p>\n<p class=\"ng-star-inserted\">Les tubes sont envoy\u00e9s au laboratoire o\u00f9 ils peuvent \u00eatre centrifug\u00e9s pour s\u00e9parer le plasma des cellules sanguines, puis analys\u00e9s par des automates de haute pr\u00e9cision.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2 data-path-to-node=\"10\">Les grands volets d&rsquo;un bilan sanguin<\/h2>\n<table style=\"height: 198px;\" width=\"700\" data-path-to-node=\"11\">\n<thead>\n<tr>\n<td><strong>Type de bilan<\/strong><\/td>\n<td><strong>Ce qu&rsquo;il mesure<\/strong><\/td>\n<td><strong>Exemple d&rsquo;anomalie recherch\u00e9e<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"11,1,0,0\"><b data-path-to-node=\"11,1,0,0\" data-index-in-node=\"0\">NFS \/ H\u00e9mogramme<\/b><\/span><\/td>\n<td><span data-path-to-node=\"11,1,1,0\">Globules rouges, globules blancs, plaquettes<\/span><\/td>\n<td><span data-path-to-node=\"11,1,2,0\">An\u00e9mie, infection, trouble de la coagulation<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"11,2,0,0\"><b data-path-to-node=\"11,2,0,0\" data-index-in-node=\"0\">Bilan biochimique<\/b><\/span><\/td>\n<td><span data-path-to-node=\"11,2,1,0\">Glucose, cr\u00e9atinine, ur\u00e9e, sodium, potassium<\/span><\/td>\n<td><span data-path-to-node=\"11,2,2,0\">Diab\u00e8te, insuffisance r\u00e9nale, d\u00e9shydratation<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"11,3,0,0\"><b data-path-to-node=\"11,3,0,0\" data-index-in-node=\"0\">Bilan h\u00e9patique<\/b><\/span><\/td>\n<td><span data-path-to-node=\"11,3,1,0\">Transaminases (ALAT, ASAT), Gamma-GT, bilirubine<\/span><\/td>\n<td><span data-path-to-node=\"11,3,2,0\">Souffrance du foie, h\u00e9patite<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"11,4,0,0\"><b data-path-to-node=\"11,4,0,0\" data-index-in-node=\"0\">Bilan lipidique<\/b><\/span><\/td>\n<td><span data-path-to-node=\"11,4,1,0\">Cholest\u00e9rol total, HDL, LDL, triglyc\u00e9rides<\/span><\/td>\n<td><span data-path-to-node=\"11,4,2,0\">Risque cardiovasculaire<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"11,5,0,0\"><b data-path-to-node=\"11,5,0,0\" data-index-in-node=\"0\">Bilan inflammatoire<\/b><\/span><\/td>\n<td><span data-path-to-node=\"11,5,1,0\">Prot\u00e9ine C-r\u00e9active (CRP), vitesse de s\u00e9dimentation<\/span><\/td>\n<td><span data-path-to-node=\"11,5,2,0\">Infection bact\u00e9rienne, maladie auto-immune<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"11,6,0,0\"><b data-path-to-node=\"11,6,0,0\" data-index-in-node=\"0\">Bilan hormonal<\/b><\/span><\/td>\n<td><span data-path-to-node=\"11,6,1,0\">TSH, cortisone, hormones sexuelles<\/span><\/td>\n<td><span data-path-to-node=\"11,6,2,0\">D\u00e9r\u00e8glement de la thyro\u00efde ou des glandes<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;analyse de sang (ou bilan sanguin) est l&rsquo;un des examens m\u00e9dicaux les plus courants et&#8230;<\/p>\n","protected":false},"author":1,"featured_media":2841,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[2605,159],"tags":[2520,2569,2599,2524,2525,2503,2557,2585,2522,2529,2521,2528,2604,2589,2580,2538,2544,2579,2600,2537,2530,2553,2588,2519,2515,2565,2586,2502,2496,2568,2541,2542,2564,2548,2526,2598,2581,2497,2493,2516,2566,2495,2531,2494,2509,2603,2602,2590,2508,2512,2558,2572,2573,2549,2561,2517,2534,2601,2532,2498,2499,2539,2577,2500,2501,2511,2510,2554,2584,2583,2582,2527,2540,2504,2506,2592,2536,2591,2593,2555,2514,2578,2576,2570,2507,2535,2574,2567,2551,2552,2563,2562,2559,2556,2505,2575,2560,2523,2543,2533,2587,2550,2596,2595,2594,2597,2518,2571,2546,2547,2545,2513],"class_list":["post-2840","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilan-sanguin","category-sante","tag-acide-urique","tag-agglutinines-atypiques","tag-aiguille","tag-alat","tag-asat","tag-basophiles","tag-betahcg","tag-bicarbonates","tag-bilan-hepatique","tag-bilan-lipidique","tag-bilan-renal","tag-bilirubine","tag-biochimie","tag-bnp","tag-ca-125","tag-calcium","tag-capacite-totale-de-fixation-du-fer","tag-cea","tag-centrifugeuse","tag-chlore","tag-cholesterol-total","tag-cortisol","tag-cpk","tag-creatinine","tag-crp","tag-d-dimeres","tag-enzymes-cardiaques","tag-eosinophiles","tag-erythrocytes","tag-facteur-rhesus","tag-fer-serique","tag-ferritine","tag-fibrinogene","tag-folates","tag-gamma-gt","tag-garrot","tag-gaz-du-sang","tag-globules-blancs","tag-globules-rouges","tag-glycemie","tag-groupe-sanguin","tag-hachure","tag-hdl","tag-hematies","tag-hematocrite","tag-hematologie","tag-hematologue","tag-hemoculture","tag-hemoglobine","tag-hemogramme","tag-hemostase","tag-hepatite-b","tag-hepatite-c","tag-hormones","tag-inr","tag-insuline","tag-ionogramme","tag-laboratoire-danalyses-medicales","tag-ldl","tag-leucocytes","tag-lymphocytes","tag-magnesium","tag-marqueurs-tumoraux","tag-monocytes","tag-neutrophiles","tag-nfs","tag-numeration-formule-sanguine","tag-oestrogenes","tag-paco2","tag-pao2","tag-ph-sanguin","tag-phosphatase-alcaline","tag-phosphore","tag-plaquettes","tag-plasma","tag-ponction-veineuse","tag-potassium","tag-prelevement-sanguin","tag-prise-de-sang","tag-progesterone","tag-proteine-c-reactive","tag-psa","tag-rubeole","tag-serologie","tag-serum","tag-sodium","tag-syphilis","tag-systeme-abo","tag-t3","tag-t4","tag-tca","tag-temps-de-cephaline-activee","tag-temps-de-quick","tag-testosterone","tag-thrombocytes","tag-toxoplasmose","tag-tq","tag-transaminases","tag-transferrine","tag-triglycerides","tag-troponine","tag-tsh","tag-tube-citrate","tag-tube-edta","tag-tube-heparine","tag-tube-sec","tag-uree","tag-vih","tag-vitamine-b12","tag-vitamine-d","tag-vitamines","tag-vitesse-de-sedimentation"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.laurensoff.com\/wordpress\/wp-content\/uploads\/2026\/09\/image-1780034950034-0-300x300.png.webp","_links":{"self":[{"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/posts\/2840","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/comments?post=2840"}],"version-history":[{"count":1,"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/posts\/2840\/revisions"}],"predecessor-version":[{"id":2842,"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/posts\/2840\/revisions\/2842"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/media\/2841"}],"wp:attachment":[{"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/media?parent=2840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/categories?post=2840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laurensoff.com\/wordpress\/wp-json\/wp\/v2\/tags?post=2840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}