{"id":859,"date":"2026-10-12T16:56:50","date_gmt":"2026-10-12T16:56:50","guid":{"rendered":"https:\/\/avo6.com\/?page_id=859"},"modified":"2026-10-12T16:56:51","modified_gmt":"2026-10-12T16:56:51","slug":"calculs-dhematologie","status":"publish","type":"page","link":"https:\/\/avo6.com\/?page_id=859","title":{"rendered":"Calculs d\u2019h\u00e9matologie"},"content":{"rendered":"\n<p>Calculs courants de l\u2019h\u00e9mogramme : valeurs absolues de la formule leucocytaire, indices \u00e9rythrocytaires, r\u00e9ticulocytes et correction des leucocytes en pr\u00e9sence d\u2019\u00e9rythroblastes. Les intervalles de r\u00e9f\u00e9rence d\u00e9pendent de l\u2019\u00e2ge, de l\u2019origine et du laboratoire : les r\u00e9sultats s\u2019interpr\u00e8tent toujours avec le compte rendu et le contexte clinique.<\/p>\n\n\n<div class=\"a6t-group a6t-has-tabs\" data-a6t-group=\"hematologie\"><nav class=\"a6t-tabs\" aria-label=\"Outils de cette page\"><ul><li><a href=\"#formule-leucocytaire\" data-a6t-tab=\"formule-leucocytaire\">Formule leucocytaire absolue<\/a><\/li><li><a href=\"#indices-erythrocytaires\" data-a6t-tab=\"indices-erythrocytaires\">VGM, TCMH, CCMH<\/a><\/li><li><a href=\"#reticulocytes\" data-a6t-tab=\"reticulocytes\">R\u00e9ticulocytes et IPR<\/a><\/li><li><a href=\"#correction-erythroblastes\" data-a6t-tab=\"correction-erythroblastes\">Leucocytes corrig\u00e9s (\u00e9rythroblastes)<\/a><\/li><li><a href=\"#ratios-nlr\" data-a6t-tab=\"ratios-nlr\">NLR, PLR, MLR<\/a><\/li><\/ul><\/nav>\t<section class=\"a6t-tool\" id=\"formule-leucocytaire\" data-a6t-panel aria-labelledby=\"a6t-formule-leucocytaire-title\">\n\t\t<h2 id=\"a6t-formule-leucocytaire-title\" class=\"a6t-title\">Formule leucocytaire en valeurs absolues (PNN \/ ANC)<\/h2>\n\t\t<p class=\"a6t-lead\">Polynucl\u00e9aires neutrophiles (ANC) et autres populations en G\/L \u00e0 partir des leucocytes et des pourcentages de la formule.<\/p>\n\n\t\t<form class=\"calc a6t-form\" data-a6t-tool=\"formule-leucocytaire\" novalidate autocomplete=\"off\" aria-label=\"Calculateur : Formule leucocytaire absolue\">\n\t\t\t\t\t\t<fieldset class=\"a6t-fieldset\" disabled>\n\t\t\t\t<legend class=\"screen-reader-text\">Donn\u00e9es \u00e0 saisir<\/legend>\n\t\t\t\t<div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-wbc\">Leucocytes<\/label><div class=\"input-unit\"><input id=\"a6t-formule-leucocytaire-wbc\" name=\"wbc\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-wbc-err\" aria-required=\"true\"><select id=\"a6t-formule-leucocytaire-wbcUnit\" name=\"wbcUnit\" aria-label=\"Unit\u00e9 \u2014 Leucocytes\"><option value=\"G\/L\" selected='selected'>G\/L (10\u2079\/L)<\/option><option value=\"\/\u00b5L\">\/\u00b5L (\/mm\u00b3)<\/option><\/select><\/div><span class=\"error\" id=\"a6t-formule-leucocytaire-wbc-err\" data-a6t-err-for=\"wbc wbcUnit\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-pNeut\">Neutrophiles segment\u00e9s (%)<\/label><input id=\"a6t-formule-leucocytaire-pNeut\" name=\"pNeut\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-pNeut-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-formule-leucocytaire-pNeut-err\" data-a6t-err-for=\"pNeut\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-pBands\">Neutrophiles non segment\u00e9s (%) \u2014 facultatif<\/label><input id=\"a6t-formule-leucocytaire-pBands\" name=\"pBands\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-pBands-err\"><span class=\"error\" id=\"a6t-formule-leucocytaire-pBands-err\" data-a6t-err-for=\"pBands\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-pLymph\">Lymphocytes (%)<\/label><input id=\"a6t-formule-leucocytaire-pLymph\" name=\"pLymph\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-pLymph-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-formule-leucocytaire-pLymph-err\" data-a6t-err-for=\"pLymph\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-pMono\">Monocytes (%)<\/label><input id=\"a6t-formule-leucocytaire-pMono\" name=\"pMono\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-pMono-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-formule-leucocytaire-pMono-err\" data-a6t-err-for=\"pMono\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-pEos\">\u00c9osinophiles (%)<\/label><input id=\"a6t-formule-leucocytaire-pEos\" name=\"pEos\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-pEos-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-formule-leucocytaire-pEos-err\" data-a6t-err-for=\"pEos\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-pBaso\">Basophiles (%)<\/label><input id=\"a6t-formule-leucocytaire-pBaso\" name=\"pBaso\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-pBaso-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-formule-leucocytaire-pBaso-err\" data-a6t-err-for=\"pBaso\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-formule-leucocytaire-pOther\">Autres cellules (%) \u2014 facultatif<\/label><input id=\"a6t-formule-leucocytaire-pOther\" name=\"pOther\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-formule-leucocytaire-pOther-hint a6t-formule-leucocytaire-pOther-err\"><span class=\"hint\" id=\"a6t-formule-leucocytaire-pOther-hint\">My\u00e9locytes, cellules anormales\u2026 pour que la somme fasse 100 %.<\/span><span class=\"error\" id=\"a6t-formule-leucocytaire-pOther-err\" data-a6t-err-for=\"pOther\" aria-live=\"polite\"><\/span><\/div>\t\t\t\t<div class=\"a6t-actions\">\n\t\t\t\t\t<button type=\"submit\" class=\"btn btn-primary\">Calculer<\/button>\n\t\t\t\t\t<button type=\"reset\" class=\"btn btn-ghost\">R\u00e9initialiser<\/button>\n\t\t\t\t\t<button type=\"button\" class=\"a6t-linkbtn\" data-a6t-example>Essayer l\u2019exemple<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/fieldset>\n\t\t\t<p class=\"error a6t-formerror\" data-a6t-err-for=\"_\" role=\"alert\"><\/p>\n\n\t\t\t<div class=\"calc-result a6t-result\" role=\"status\" aria-live=\"polite\" tabindex=\"-1\" hidden>\n\t\t\t\t<div class=\"a6t-main\"><\/div>\n\t\t\t\t<ul class=\"a6t-lines\"><\/ul>\n\t\t\t\t<div class=\"a6t-chart\"><\/div>\n\t\t\t\t<div class=\"a6t-table\"><\/div>\n\t\t\t\t<p class=\"a6t-formula\"><\/p>\n\t\t\t\t<ul class=\"a6t-notes\"><\/ul>\n\t\t\t\t<p class=\"hint\">R\u00e9sultat indicatif, \u00e0 interpr\u00e9ter par un professionnel de sant\u00e9.<\/p>\n\t\t\t\t<div class=\"a6t-result-actions\">\n\t\t\t\t\t<button type=\"button\" class=\"btn btn-ghost\" data-a6t-copy>Copier le r\u00e9sultat<\/button>\n\t\t\t\t\t<span class=\"a6t-copied\" aria-live=\"polite\"><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\t<noscript><p class=\"notice\">Ce calculateur fonctionne dans votre navigateur et n\u00e9cessite JavaScript. La formule et un exemple sont d\u00e9taill\u00e9s ci-dessous.<\/p><\/noscript>\n\t\t\t<script type=\"application\/json\" class=\"a6t-example-data\">{\"wbc\":\"6\",\"wbcUnit\":\"G\\\/L\",\"pNeut\":\"60\",\"pLymph\":\"30\",\"pMono\":\"6\",\"pEos\":\"3\",\"pBaso\":\"1\"}<\/script>\n\t\t<\/form>\n\n\t\t<div class=\"a6t-doc\">\n\t\t\t<h3>Formule<\/h3>\n\t\t\t<div class=\"a6t-formula-box\"><p>Valeur absolue (G\/L) = leucocytes (G\/L) \u00d7 pourcentage \/ 100<\/p><p>PNN absolus (ANC) = leucocytes \u00d7 (neutrophiles segment\u00e9s + non segment\u00e9s) \/ 100.<\/p><\/div>\n\n\t\t\t<h3>Unit\u00e9s<\/h3>\n\t\t\t<p>Leucocytes en G\/L (= 10\u2079\/L) ou \/\u00b5L (= \/mm\u00b3 ; 1 G\/L = 1 000 \/\u00b5L). Pourcentages dont la somme doit \u00eatre 100 % (\u00b1 1).<\/p>\n\n\t\t\t<h3>Exemple<\/h3>\n\t\t\t<p>Leucocytes 6,0 G\/L avec 60 % de neutrophiles : PNN = 6,0 \u00d7 60 \/ 100 = 3,60 G\/L ; lymphocytes 1,80 G\/L.<\/p>\n\n\t\t\t<h3>Limites<\/h3>\n\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t<li>Les intervalles de r\u00e9f\u00e9rence d\u00e9pendent de l\u2019\u00e2ge (enfant), de l\u2019origine (neutrop\u00e9nie sans risque accru chez les sujets Duffy-null) et du laboratoire.<\/li>\n\t\t\t\t\t\t\t\t\t<li>La cotation CTCAE v6 (2025) des neutrophiles \u2014 grade 1 &lt; 1,5\u20131,0 ; grade 2 &lt; 1,0\u20130,5 ; grade 3 &lt; 0,5\u20130,1 ; grade 4 &lt; 0,1 G\/L \u2014 sert aux essais cliniques : ce n\u2019est pas un diagnostic.<\/li>\n\t\t\t\t\t\t\t\t\t<li>Une formule manuelle sur 100 cellules a une impr\u00e9cision importante pour les populations rares (basophiles, \u00e9osinophiles).<\/li>\n\t\t\t\t\t\t\t<\/ul>\n\n\t\t\t<h3>R\u00e9f\u00e9rences<\/h3>\n\t\t\t<ol class=\"a6t-refs\">\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/doi.org\/10.1002\/hem3.70266\" rel=\"noopener\" target=\"_blank\">Merz LE. A paradigm shift in neutrophil adverse event grading: What now? HemaSphere. 2025;9(12):e70266 (cotation CTCAE v6).<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.bipm.org\/fr\/publications\/si-brochure\" rel=\"noopener\" target=\"_blank\">BIPM. Le Syst\u00e8me international d\u2019unit\u00e9s (SI), 9e \u00e9dition.<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<\/ol>\n\t\t\t<p class=\"a6t-verified\">Formule v\u00e9rifi\u00e9e par rapport aux r\u00e9f\u00e9rences ci-dessus le 12 octobre 2026.<\/p>\n\t\t<\/div>\n\t<\/section>\n\t\t<section class=\"a6t-tool\" id=\"indices-erythrocytaires\" data-a6t-panel aria-labelledby=\"a6t-indices-erythrocytaires-title\">\n\t\t<h2 id=\"a6t-indices-erythrocytaires-title\" class=\"a6t-title\">Indices \u00e9rythrocytaires : VGM, TCMH, CCMH<\/h2>\n\t\t<p class=\"a6t-lead\">Volume globulaire moyen, teneur et concentration corpusculaires moyennes en h\u00e9moglobine \u00e0 partir de GR, Hb et h\u00e9matocrite.<\/p>\n\n\t\t<form class=\"calc a6t-form\" data-a6t-tool=\"indices-erythrocytaires\" novalidate autocomplete=\"off\" aria-label=\"Calculateur : VGM, TCMH, CCMH\">\n\t\t\t\t\t\t<fieldset class=\"a6t-fieldset\" disabled>\n\t\t\t\t<legend class=\"screen-reader-text\">Donn\u00e9es \u00e0 saisir<\/legend>\n\t\t\t\t<div class=\"field a6t-field\"><label for=\"a6t-indices-erythrocytaires-rbc\">Globules rouges (T\/L = 10\u00b9\u00b2\/L)<\/label><input id=\"a6t-indices-erythrocytaires-rbc\" name=\"rbc\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-indices-erythrocytaires-rbc-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-indices-erythrocytaires-rbc-err\" data-a6t-err-for=\"rbc\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-indices-erythrocytaires-hb\">H\u00e9moglobine<\/label><div class=\"input-unit\"><input id=\"a6t-indices-erythrocytaires-hb\" name=\"hb\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-indices-erythrocytaires-hb-err\" aria-required=\"true\"><select id=\"a6t-indices-erythrocytaires-hbUnit\" name=\"hbUnit\" aria-label=\"Unit\u00e9 \u2014 H\u00e9moglobine\"><option value=\"g\/dL\" selected='selected'>g\/dL<\/option><option value=\"g\/L\">g\/L<\/option><\/select><\/div><span class=\"error\" id=\"a6t-indices-erythrocytaires-hb-err\" data-a6t-err-for=\"hb hbUnit\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-indices-erythrocytaires-hct\">H\u00e9matocrite<\/label><div class=\"input-unit\"><input id=\"a6t-indices-erythrocytaires-hct\" name=\"hct\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-indices-erythrocytaires-hct-err\" aria-required=\"true\"><select id=\"a6t-indices-erythrocytaires-hctUnit\" name=\"hctUnit\" aria-label=\"Unit\u00e9 \u2014 H\u00e9matocrite\"><option value=\"%\" selected='selected'>%<\/option><option value=\"L\/L\">L\/L<\/option><\/select><\/div><span class=\"error\" id=\"a6t-indices-erythrocytaires-hct-err\" data-a6t-err-for=\"hct hctUnit\" aria-live=\"polite\"><\/span><\/div>\t\t\t\t<div class=\"a6t-actions\">\n\t\t\t\t\t<button type=\"submit\" class=\"btn btn-primary\">Calculer<\/button>\n\t\t\t\t\t<button type=\"reset\" class=\"btn btn-ghost\">R\u00e9initialiser<\/button>\n\t\t\t\t\t<button type=\"button\" class=\"a6t-linkbtn\" data-a6t-example>Essayer l\u2019exemple<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/fieldset>\n\t\t\t<p class=\"error a6t-formerror\" data-a6t-err-for=\"_\" role=\"alert\"><\/p>\n\n\t\t\t<div class=\"calc-result a6t-result\" role=\"status\" aria-live=\"polite\" tabindex=\"-1\" hidden>\n\t\t\t\t<div class=\"a6t-main\"><\/div>\n\t\t\t\t<ul class=\"a6t-lines\"><\/ul>\n\t\t\t\t<div class=\"a6t-chart\"><\/div>\n\t\t\t\t<div class=\"a6t-table\"><\/div>\n\t\t\t\t<p class=\"a6t-formula\"><\/p>\n\t\t\t\t<ul class=\"a6t-notes\"><\/ul>\n\t\t\t\t<p class=\"hint\">R\u00e9sultat indicatif, \u00e0 interpr\u00e9ter par un professionnel de sant\u00e9.<\/p>\n\t\t\t\t<div class=\"a6t-result-actions\">\n\t\t\t\t\t<button type=\"button\" class=\"btn btn-ghost\" data-a6t-copy>Copier le r\u00e9sultat<\/button>\n\t\t\t\t\t<span class=\"a6t-copied\" aria-live=\"polite\"><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\t<noscript><p class=\"notice\">Ce calculateur fonctionne dans votre navigateur et n\u00e9cessite JavaScript. La formule et un exemple sont d\u00e9taill\u00e9s ci-dessous.<\/p><\/noscript>\n\t\t\t<script type=\"application\/json\" class=\"a6t-example-data\">{\"rbc\":\"4,5\",\"hb\":\"13,5\",\"hbUnit\":\"g\\\/dL\",\"hct\":\"40\",\"hctUnit\":\"%\"}<\/script>\n\t\t<\/form>\n\n\t\t<div class=\"a6t-doc\">\n\t\t\t<h3>Formule<\/h3>\n\t\t\t<div class=\"a6t-formula-box\"><p>VGM (fL) = Ht (%) \u00d7 10 \/ GR (T\/L)<\/p><p>TCMH (pg) = Hb (g\/dL) \u00d7 10 \/ GR (T\/L)<\/p><p>CCMH (g\/dL) = Hb (g\/dL) \u00d7 100 \/ Ht (%)<\/p><\/div>\n\n\t\t\t<h3>Unit\u00e9s<\/h3>\n\t\t\t<p>GR en T\/L (10\u00b9\u00b2\/L, soit 10\u2076\/\u00b5L) ; Hb en g\/dL ou g\/L ; Ht en % ou L\/L. CCMH aussi affich\u00e9e en g\/L.<\/p>\n\n\t\t\t<h3>Exemple<\/h3>\n\t\t\t<p>GR 4,5 T\/L, Hb 13,5 g\/dL, Ht 40 % : VGM = 88,9 fL ; TCMH = 30,0 pg ; CCMH = 33,8 g\/dL.<\/p>\n\n\t\t\t<h3>Limites<\/h3>\n\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t<li>Les analyseurs mesurent souvent directement le VGM et calculent l\u2019h\u00e9matocrite : le calcul manuel peut diff\u00e9rer l\u00e9g\u00e8rement du compte rendu.<\/li>\n\t\t\t\t\t\t\t\t\t<li>Une CCMH anormalement \u00e9lev\u00e9e doit faire suspecter une interf\u00e9rence (agglutinines froides, lip\u00e9mie, h\u00e9molyse) ou une sph\u00e9rocytose.<\/li>\n\t\t\t\t\t\t\t\t\t<li>Les intervalles de r\u00e9f\u00e9rence varient selon l\u2019\u00e2ge, le sexe et le laboratoire.<\/li>\n\t\t\t\t\t\t\t<\/ul>\n\n\t\t\t<h3>R\u00e9f\u00e9rences<\/h3>\n\t\t\t<ol class=\"a6t-refs\">\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK260\/\" rel=\"noopener\" target=\"_blank\">Sarma PR. Red Cell Indices. In: Walker HK, Hall WD, Hurst JW, eds. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd ed. Butterworths; 1990. Chapter 152.<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<\/ol>\n\t\t\t<p class=\"a6t-verified\">Formule v\u00e9rifi\u00e9e par rapport aux r\u00e9f\u00e9rences ci-dessus le 12 octobre 2026.<\/p>\n\t\t<\/div>\n\t<\/section>\n\t\t<section class=\"a6t-tool\" id=\"reticulocytes\" data-a6t-panel aria-labelledby=\"a6t-reticulocytes-title\">\n\t\t<h2 id=\"a6t-reticulocytes-title\" class=\"a6t-title\">R\u00e9ticulocytes : valeur absolue, pourcentage corrig\u00e9 et IPR<\/h2>\n\t\t<p class=\"a6t-lead\">R\u00e9ticulocytes absolus, pourcentage corrig\u00e9 par l\u2019h\u00e9matocrite et indice de production r\u00e9ticulocytaire (IPR\/RPI).<\/p>\n\n\t\t<form class=\"calc a6t-form\" data-a6t-tool=\"reticulocytes\" novalidate autocomplete=\"off\" aria-label=\"Calculateur : R\u00e9ticulocytes et IPR\">\n\t\t\t\t\t\t<fieldset class=\"a6t-fieldset\" disabled>\n\t\t\t\t<legend class=\"screen-reader-text\">Donn\u00e9es \u00e0 saisir<\/legend>\n\t\t\t\t<div class=\"field a6t-field\"><label for=\"a6t-reticulocytes-retic\">R\u00e9ticulocytes (%)<\/label><input id=\"a6t-reticulocytes-retic\" name=\"retic\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-reticulocytes-retic-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-reticulocytes-retic-err\" data-a6t-err-for=\"retic\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-reticulocytes-rbc\">Globules rouges (T\/L) \u2014 pour la valeur absolue<\/label><input id=\"a6t-reticulocytes-rbc\" name=\"rbc\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-reticulocytes-rbc-err\"><span class=\"error\" id=\"a6t-reticulocytes-rbc-err\" data-a6t-err-for=\"rbc\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-reticulocytes-hct\">H\u00e9matocrite (%) \u2014 pour le % corrig\u00e9 et l\u2019IPR<\/label><input id=\"a6t-reticulocytes-hct\" name=\"hct\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-reticulocytes-hct-err\"><span class=\"error\" id=\"a6t-reticulocytes-hct-err\" data-a6t-err-for=\"hct\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-reticulocytes-hctRef\">H\u00e9matocrite de r\u00e9f\u00e9rence (%) \u2014 facultatif<\/label><input id=\"a6t-reticulocytes-hctRef\" name=\"hctRef\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-reticulocytes-hctRef-hint a6t-reticulocytes-hctRef-err\"><span class=\"hint\" id=\"a6t-reticulocytes-hctRef-hint\">45 % si vide (valeur utilis\u00e9e par la formule de r\u00e9f\u00e9rence).<\/span><span class=\"error\" id=\"a6t-reticulocytes-hctRef-err\" data-a6t-err-for=\"hctRef\" aria-live=\"polite\"><\/span><\/div>\t\t\t\t<div class=\"a6t-actions\">\n\t\t\t\t\t<button type=\"submit\" class=\"btn btn-primary\">Calculer<\/button>\n\t\t\t\t\t<button type=\"reset\" class=\"btn btn-ghost\">R\u00e9initialiser<\/button>\n\t\t\t\t\t<button type=\"button\" class=\"a6t-linkbtn\" data-a6t-example>Essayer l\u2019exemple<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/fieldset>\n\t\t\t<p class=\"error a6t-formerror\" data-a6t-err-for=\"_\" role=\"alert\"><\/p>\n\n\t\t\t<div class=\"calc-result a6t-result\" role=\"status\" aria-live=\"polite\" tabindex=\"-1\" hidden>\n\t\t\t\t<div class=\"a6t-main\"><\/div>\n\t\t\t\t<ul class=\"a6t-lines\"><\/ul>\n\t\t\t\t<div class=\"a6t-chart\"><\/div>\n\t\t\t\t<div class=\"a6t-table\"><\/div>\n\t\t\t\t<p class=\"a6t-formula\"><\/p>\n\t\t\t\t<ul class=\"a6t-notes\"><\/ul>\n\t\t\t\t<p class=\"hint\">R\u00e9sultat indicatif, \u00e0 interpr\u00e9ter par un professionnel de sant\u00e9.<\/p>\n\t\t\t\t<div class=\"a6t-result-actions\">\n\t\t\t\t\t<button type=\"button\" class=\"btn btn-ghost\" data-a6t-copy>Copier le r\u00e9sultat<\/button>\n\t\t\t\t\t<span class=\"a6t-copied\" aria-live=\"polite\"><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\t<noscript><p class=\"notice\">Ce calculateur fonctionne dans votre navigateur et n\u00e9cessite JavaScript. La formule et un exemple sont d\u00e9taill\u00e9s ci-dessous.<\/p><\/noscript>\n\t\t\t<script type=\"application\/json\" class=\"a6t-example-data\">{\"retic\":\"3\",\"rbc\":\"3\",\"hct\":\"27\"}<\/script>\n\t\t<\/form>\n\n\t\t<div class=\"a6t-doc\">\n\t\t\t<h3>Formule<\/h3>\n\t\t\t<div class=\"a6t-formula-box\"><p>R\u00e9ticulocytes absolus (G\/L) = % \/ 100 \u00d7 GR (T\/L) \u00d7 1 000<\/p><p>% corrig\u00e9 = % \u00d7 Ht \/ Ht de r\u00e9f\u00e9rence ; IPR = % corrig\u00e9 \/ temps de maturation<\/p><p>Maturation : 1,0 j (Ht \u2265 40 %) ; 1,5 j (30\u201339,9 %) ; 2,0 j (20\u201329,9 %) ; 2,5 j (&lt; 20 %).<\/p><\/div>\n\n\t\t\t<h3>Unit\u00e9s<\/h3>\n\t\t\t<p>R\u00e9ticulocytes en % ; GR en T\/L ; h\u00e9matocrite en %. R\u00e9sultat absolu en G\/L.<\/p>\n\n\t\t\t<h3>Exemple<\/h3>\n\t\t\t<p>R\u00e9ticulocytes 3 %, GR 3,0 T\/L, Ht 27 % : 90 G\/L ; % corrig\u00e9 = 3 \u00d7 27 \/ 45 = 1,8 % ; IPR = 1,8 \/ 2,0 = 0,9.<\/p>\n\n\t\t\t<h3>Limites<\/h3>\n\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t<li>Les rep\u00e8res d\u2019interpr\u00e9tation (IPR &lt; 2 : r\u00e9ponse insuffisante en cas d\u2019an\u00e9mie) sont indicatifs.<\/li>\n\t\t\t\t\t\t\t\t\t<li>Les automates rendent directement les r\u00e9ticulocytes absolus, souvent plus pr\u00e9cis que le calcul \u00e0 partir d\u2019un pourcentage.<\/li>\n\t\t\t\t\t\t\t<\/ul>\n\n\t\t\t<h3>R\u00e9f\u00e9rences<\/h3>\n\t\t\t<ol class=\"a6t-refs\">\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.msdmanuals.com\/medical-calculators\/ReticProdIndex-en.htm\" rel=\"noopener\" target=\"_blank\">Hutchinson RE, Davey FR. Hematopoiesis. In: Henry JB, ed. Clinical Diagnosis and Management by Laboratory Methods. 19th ed. WB Saunders; 1996 \u2014 via le calculateur IPR des Manuels MSD.<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<\/ol>\n\t\t\t<p class=\"a6t-verified\">Formule v\u00e9rifi\u00e9e par rapport aux r\u00e9f\u00e9rences ci-dessus le 12 octobre 2026.<\/p>\n\t\t<\/div>\n\t<\/section>\n\t\t<section class=\"a6t-tool\" id=\"correction-erythroblastes\" data-a6t-panel aria-labelledby=\"a6t-correction-erythroblastes-title\">\n\t\t<h2 id=\"a6t-correction-erythroblastes-title\" class=\"a6t-title\">Correction des leucocytes en pr\u00e9sence d\u2019\u00e9rythroblastes<\/h2>\n\t\t<p class=\"a6t-lead\">Leucocytes corrig\u00e9s lorsque des \u00e9rythroblastes (GR nucl\u00e9\u00e9s) ont \u00e9t\u00e9 compt\u00e9s comme leucocytes.<\/p>\n\n\t\t<form class=\"calc a6t-form\" data-a6t-tool=\"correction-erythroblastes\" novalidate autocomplete=\"off\" aria-label=\"Calculateur : Leucocytes corrig\u00e9s (\u00e9rythroblastes)\">\n\t\t\t\t\t\t<fieldset class=\"a6t-fieldset\" disabled>\n\t\t\t\t<legend class=\"screen-reader-text\">Donn\u00e9es \u00e0 saisir<\/legend>\n\t\t\t\t<div class=\"field a6t-field\"><label for=\"a6t-correction-erythroblastes-wbc\">Leucocytes non corrig\u00e9s (G\/L)<\/label><input id=\"a6t-correction-erythroblastes-wbc\" name=\"wbc\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-correction-erythroblastes-wbc-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-correction-erythroblastes-wbc-err\" data-a6t-err-for=\"wbc\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-correction-erythroblastes-nrbc\">\u00c9rythroblastes pour 100 leucocytes<\/label><input id=\"a6t-correction-erythroblastes-nrbc\" name=\"nrbc\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-correction-erythroblastes-nrbc-hint a6t-correction-erythroblastes-nrbc-err\" aria-required=\"true\"><span class=\"hint\" id=\"a6t-correction-erythroblastes-nrbc-hint\">Compt\u00e9 sur le frottis lors de la formule.<\/span><span class=\"error\" id=\"a6t-correction-erythroblastes-nrbc-err\" data-a6t-err-for=\"nrbc\" aria-live=\"polite\"><\/span><\/div>\t\t\t\t<div class=\"a6t-actions\">\n\t\t\t\t\t<button type=\"submit\" class=\"btn btn-primary\">Calculer<\/button>\n\t\t\t\t\t<button type=\"reset\" class=\"btn btn-ghost\">R\u00e9initialiser<\/button>\n\t\t\t\t\t<button type=\"button\" class=\"a6t-linkbtn\" data-a6t-example>Essayer l\u2019exemple<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/fieldset>\n\t\t\t<p class=\"error a6t-formerror\" data-a6t-err-for=\"_\" role=\"alert\"><\/p>\n\n\t\t\t<div class=\"calc-result a6t-result\" role=\"status\" aria-live=\"polite\" tabindex=\"-1\" hidden>\n\t\t\t\t<div class=\"a6t-main\"><\/div>\n\t\t\t\t<ul class=\"a6t-lines\"><\/ul>\n\t\t\t\t<div class=\"a6t-chart\"><\/div>\n\t\t\t\t<div class=\"a6t-table\"><\/div>\n\t\t\t\t<p class=\"a6t-formula\"><\/p>\n\t\t\t\t<ul class=\"a6t-notes\"><\/ul>\n\t\t\t\t<p class=\"hint\">R\u00e9sultat indicatif, \u00e0 interpr\u00e9ter par un professionnel de sant\u00e9.<\/p>\n\t\t\t\t<div class=\"a6t-result-actions\">\n\t\t\t\t\t<button type=\"button\" class=\"btn btn-ghost\" data-a6t-copy>Copier le r\u00e9sultat<\/button>\n\t\t\t\t\t<span class=\"a6t-copied\" aria-live=\"polite\"><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\t<noscript><p class=\"notice\">Ce calculateur fonctionne dans votre navigateur et n\u00e9cessite JavaScript. La formule et un exemple sont d\u00e9taill\u00e9s ci-dessous.<\/p><\/noscript>\n\t\t\t<script type=\"application\/json\" class=\"a6t-example-data\">{\"wbc\":\"19,3\",\"nrbc\":\"36\"}<\/script>\n\t\t<\/form>\n\n\t\t<div class=\"a6t-doc\">\n\t\t\t<h3>Formule<\/h3>\n\t\t\t<div class=\"a6t-formula-box\"><p>Leucocytes corrig\u00e9s = leucocytes \u00d7 100 \/ (100 + \u00e9rythroblastes pour 100 leucocytes)<\/p><\/div>\n\n\t\t\t<h3>Unit\u00e9s<\/h3>\n\t\t\t<p>Leucocytes en G\/L ; \u00e9rythroblastes en nombre pour 100 leucocytes.<\/p>\n\n\t\t\t<h3>Exemple<\/h3>\n\t\t\t<p>19,3 G\/L et 36 \u00e9rythroblastes pour 100 leucocytes : 19,3 \u00d7 100 \/ 136 = 14,2 G\/L.<\/p>\n\n\t\t\t<h3>Limites<\/h3>\n\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t<li>De nombreux analyseurs actuels identifient et excluent d\u00e9j\u00e0 les \u00e9rythroblastes : v\u00e9rifier avant de corriger pour ne pas corriger deux fois.<\/li>\n\t\t\t\t\t\t\t<\/ul>\n\n\t\t\t<h3>R\u00e9f\u00e9rences<\/h3>\n\t\t\t<ol class=\"a6t-refs\">\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/pressbooks.nscc.ca\/mltd-hemlab\/?p=346\" rel=\"noopener\" target=\"_blank\">WBC Correction for the Presence of NRBCs. Hematology Laboratory Manual (MLT), Nova Scotia Community College \u2014 Pressbooks.<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<\/ol>\n\t\t\t<p class=\"a6t-verified\">Formule v\u00e9rifi\u00e9e par rapport aux r\u00e9f\u00e9rences ci-dessus le 12 octobre 2026.<\/p>\n\t\t<\/div>\n\t<\/section>\n\t\t<section class=\"a6t-tool\" id=\"ratios-nlr\" data-a6t-panel aria-labelledby=\"a6t-ratios-nlr-title\">\n\t\t<h2 id=\"a6t-ratios-nlr-title\" class=\"a6t-title\">Rapports NLR, PLR et MLR<\/h2>\n\t\t<p class=\"a6t-lead\">Rapports neutrophiles\/lymphocytes, plaquettes\/lymphocytes et monocytes\/lymphocytes, pr\u00e9sent\u00e9s comme indices descriptifs.<\/p>\n\n\t\t<form class=\"calc a6t-form\" data-a6t-tool=\"ratios-nlr\" novalidate autocomplete=\"off\" aria-label=\"Calculateur : NLR, PLR, MLR\">\n\t\t\t\t\t\t<fieldset class=\"a6t-fieldset\" disabled>\n\t\t\t\t<legend class=\"screen-reader-text\">Donn\u00e9es \u00e0 saisir<\/legend>\n\t\t\t\t<div class=\"field a6t-field\"><label for=\"a6t-ratios-nlr-lymph\">Lymphocytes (G\/L)<\/label><input id=\"a6t-ratios-nlr-lymph\" name=\"lymph\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-ratios-nlr-lymph-err\" aria-required=\"true\"><span class=\"error\" id=\"a6t-ratios-nlr-lymph-err\" data-a6t-err-for=\"lymph\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-ratios-nlr-neut\">Neutrophiles (G\/L)<\/label><input id=\"a6t-ratios-nlr-neut\" name=\"neut\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-ratios-nlr-neut-err\"><span class=\"error\" id=\"a6t-ratios-nlr-neut-err\" data-a6t-err-for=\"neut\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-ratios-nlr-mono\">Monocytes (G\/L) \u2014 facultatif<\/label><input id=\"a6t-ratios-nlr-mono\" name=\"mono\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-ratios-nlr-mono-err\"><span class=\"error\" id=\"a6t-ratios-nlr-mono-err\" data-a6t-err-for=\"mono\" aria-live=\"polite\"><\/span><\/div><div class=\"field a6t-field\"><label for=\"a6t-ratios-nlr-plt\">Plaquettes (G\/L) \u2014 facultatif<\/label><input id=\"a6t-ratios-nlr-plt\" name=\"plt\" type=\"text\" inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" value=\"\" aria-describedby=\"a6t-ratios-nlr-plt-err\"><span class=\"error\" id=\"a6t-ratios-nlr-plt-err\" data-a6t-err-for=\"plt\" aria-live=\"polite\"><\/span><\/div>\t\t\t\t<div class=\"a6t-actions\">\n\t\t\t\t\t<button type=\"submit\" class=\"btn btn-primary\">Calculer<\/button>\n\t\t\t\t\t<button type=\"reset\" class=\"btn btn-ghost\">R\u00e9initialiser<\/button>\n\t\t\t\t\t<button type=\"button\" class=\"a6t-linkbtn\" data-a6t-example>Essayer l\u2019exemple<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/fieldset>\n\t\t\t<p class=\"error a6t-formerror\" data-a6t-err-for=\"_\" role=\"alert\"><\/p>\n\n\t\t\t<div class=\"calc-result a6t-result\" role=\"status\" aria-live=\"polite\" tabindex=\"-1\" hidden>\n\t\t\t\t<div class=\"a6t-main\"><\/div>\n\t\t\t\t<ul class=\"a6t-lines\"><\/ul>\n\t\t\t\t<div class=\"a6t-chart\"><\/div>\n\t\t\t\t<div class=\"a6t-table\"><\/div>\n\t\t\t\t<p class=\"a6t-formula\"><\/p>\n\t\t\t\t<ul class=\"a6t-notes\"><\/ul>\n\t\t\t\t<p class=\"hint\">R\u00e9sultat indicatif, \u00e0 interpr\u00e9ter par un professionnel de sant\u00e9.<\/p>\n\t\t\t\t<div class=\"a6t-result-actions\">\n\t\t\t\t\t<button type=\"button\" class=\"btn btn-ghost\" data-a6t-copy>Copier le r\u00e9sultat<\/button>\n\t\t\t\t\t<span class=\"a6t-copied\" aria-live=\"polite\"><\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\t<noscript><p class=\"notice\">Ce calculateur fonctionne dans votre navigateur et n\u00e9cessite JavaScript. La formule et un exemple sont d\u00e9taill\u00e9s ci-dessous.<\/p><\/noscript>\n\t\t\t<script type=\"application\/json\" class=\"a6t-example-data\">{\"neut\":\"4,2\",\"lymph\":\"1,4\",\"mono\":\"0,5\",\"plt\":\"250\"}<\/script>\n\t\t<\/form>\n\n\t\t<div class=\"a6t-doc\">\n\t\t\t<h3>Formule<\/h3>\n\t\t\t<div class=\"a6t-formula-box\"><p>NLR = neutrophiles \/ lymphocytes ; PLR = plaquettes \/ lymphocytes ; MLR = monocytes \/ lymphocytes (valeurs absolues dans la m\u00eame unit\u00e9).<\/p><\/div>\n\n\t\t\t<h3>Unit\u00e9s<\/h3>\n\t\t\t<p>Valeurs absolues en G\/L ; les rapports sont sans unit\u00e9.<\/p>\n\n\t\t\t<h3>Exemple<\/h3>\n\t\t\t<p>Neutrophiles 4,2, lymphocytes 1,4, monocytes 0,5 et plaquettes 250 G\/L : NLR = 3,00 ; PLR = 179 ; MLR = 0,36.<\/p>\n\n\t\t\t<h3>Limites<\/h3>\n\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t<li>Aucun seuil universel n\u2019est valid\u00e9 : les valeurs publi\u00e9es varient selon les populations et les pathologies \u00e9tudi\u00e9es.<\/li>\n\t\t\t\t\t\t\t\t\t<li>Indices descriptifs de l\u2019inflammation et du stress, influenc\u00e9s par de nombreux facteurs (cortico\u00efdes, infection, chimioth\u00e9rapie). Ils ne constituent jamais un diagnostic autonome.<\/li>\n\t\t\t\t\t\t\t<\/ul>\n\n\t\t\t<h3>R\u00e9f\u00e9rences<\/h3>\n\t\t\t<ol class=\"a6t-refs\">\n\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/11723675\/\" rel=\"noopener\" target=\"_blank\">Zahorec R. Ratio of neutrophil to lymphocyte counts \u2014 rapid and simple parameter of systemic inflammation and stress in critically ill. Bratisl Lek Listy. 2001;102(1):5-14.<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<\/ol>\n\t\t\t<p class=\"a6t-verified\">Formule v\u00e9rifi\u00e9e par rapport aux r\u00e9f\u00e9rences ci-dessus le 12 octobre 2026.<\/p>\n\t\t<\/div>\n\t<\/section>\n\t<aside class=\"box box-warning a6t-disclaimer\" role=\"note\"><strong>Avertissement :<\/strong> ces outils sont p\u00e9dagogiques. Les calculs sont effectu\u00e9s dans votre navigateur ; aucune valeur n\u2019est enregistr\u00e9e ni transmise. Ils ne posent pas de diagnostic et ne remplacent pas l\u2019avis d\u2019un m\u00e9decin, d\u2019un biologiste ou d\u2019un pharmacien.<\/aside><nav class=\"a6t-related\" aria-labelledby=\"a6t-rel-hematologie\"><h2 id=\"a6t-rel-hematologie\">Outils associ\u00e9s<\/h2><ul><li><a href=\"https:\/\/avo6.com\/?page_id=849\">Convertisseur d\u2019unit\u00e9s biologiques<\/a><\/li><li><a href=\"https:\/\/avo6.com\/?page_id=867\">Biostatistiques et contr\u00f4le qualit\u00e9<\/a><\/li><li><a href=\"https:\/\/avo6.com\/?page_id=857\">Tous les outils de biologie m\u00e9dicale<\/a><\/li><\/ul><\/nav><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Calculs courants de l\u2019h\u00e9mogramme : valeurs absolues de la formule leucocytaire, indices \u00e9rythrocytaires, r\u00e9ticulocytes et correction des leucocytes en pr\u00e9sence d\u2019\u00e9rythroblastes. Les intervalles de\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"class_list":["post-859","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Calculs courants de l\u2019h\u00e9mogramme : valeurs absolues de la formule leucocytaire, indices \u00e9rythrocytaires, r\u00e9ticulocytes et correction des leucocytes en pr\u00e9sence d\u2019\u00e9rythroblastes. 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