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Toward new insights on the white blood cell differential by flow cytometry: A proof of concept study on the sepsis model
Author(s) -
Roussel Mikael,
Gros Antoine,
Gacouin Arnaud,
Le Meur Nolwenn,
Le Tulzo Yves,
Fest Thierry
Publication year - 2012
Publication title -
cytometry part b: clinical cytometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 61
eISSN - 1552-4957
pISSN - 1552-4949
DOI - 10.1002/cyto.b.21027
Subject(s) - septic shock , sepsis , concordance , differential diagnosis , flow cytometry , medicine , hematology , white blood cell , intensive care unit , oncology , immunology , pathology
Background: We sought to evaluate, on a model of sepsis, the clinical relevance of new parameters obtained on a white blood cell (WBC) differential by flow cytometry, implemented in the routine workflow of our hematology laboratory. Methods: A WBC with differential by flow cytometry was done on 459 patients at admission in intensive care unit. They were retrospectively categorized in having (i) infection or not or (ii) a high gravity score (severe sepsis or septic shock) or not. We analyzed by hierarchical clustering, in a multidimensional manner, 50 parameters provided by the flow cytometric platform in place of the standard seven parameters for a standard differential. Results: Our approach allows to discriminate on the basis of a WBC differential (i) infected patients at admission based on a 16 parameter signature, with a concordance rate of 72.7% and a specificity of 79.9% and (ii) patients with high gravity score (septic shock or severe sepsis) at admission with a signature of eight parameters, with a concordance rate of 74.7% and a specificity of 75.9%. Conclusions: This study shows the clinical relevance of an extended WBC differential to obtain by a flow cytometer integrated into a routine hematology laboratory workflow. Development of such approach implicates the redefinition of the WBC differential by integrating new parameters. © 2012 International Clinical Cytometry Society