[fr] Le mode d’analyse des liquides de ponction du Sysmex XE-5000 a été évalué sur 159 liquides de ponction, dont 60 liquides céphalorachidiens. La numération érythrocytaire et leucocytaire a été comparée aux comptages réalisés en microscopie en chambre de Fuchs-Rosenthal. La différentiation des cellules monucléées et polynucléées par le XE-5000 a été comparée à la formule manuelle obtenue sur lames de cytocentrifugation. Une bonne corrélation a été obtenue entre le XE-5000 et la technique manuelle avec des coefficients de
corrélation supérieurs à 0,8 pour la numération des érythrocytes et des leucocytes ainsi que
pour la différenciation leucocytaire pour la plupart des liquides de ponction. La limite de sensibilité fonctionnelle (c’est-à-dire une précision intra-série supérieure à 20 %) a été atteinte pour des numérations érythrocytaires inférieures à 400/ L et leucocytaires inférieures à 30/ L.
La contamination inter-échantillons est négligeable et la linéarité est satisfaisante jusqu’à 400 érythrocytes/ L et 30 leucocytes/ L. Ces résultats montrent que l’analyse automatisée des liquides de ponction par le XE-5000 est une alternative acceptable à la technique microscopique
de référence aussi bien pour la numération érythrocytaire et leucocytaire que pour la
différenciation des cellules polymorphonucléées et mononucléées pour la majorité des liquides
de ponction y compris les liquides céphalorachidiens.
The body fluid mode on the Sysmex XE-5000 automated hematology analyzer was evaluated on 99 body fluids and 60 cerebrospinal fluids. Erythrocyte and leukocyte numeration was compared to microscopic counts on Fuchs-Rosenthal chambers. Differentiation of mononuclear
(MN) and polymorphonuclear (PMN) cells on the XE-5000 was compared to manual differential on cytospin slides. A good agreement was found between the XE-5000 and the manual method with correlation coefficients more than 0.8 for erythrocyte counts, leukocyte counts and leukocyte differentiation in most types of body fluids. The functional sensitivity limit (i.e., within run precision more than 20%) was reached for red blood cell counts more than
400/ L and white blood cell counts more than 30/ L. Carry over was negligible and linearity was adequate for as low as 400 erythrocytes/ L and 30 leucocytes/ L. Our results demonstrate
that the automated body fluid analysis on the XE-5000 is an acceptable alternative to the microscopic reference method for erythrocyte and leukocyte numeration as well as MN and
PMN differential for most body fluids including cerebrospinal fluids.
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