CLSI H20

Reference Leukocyte (WBC) Differential Count (Proportional) and Evaluation of Instrumental Methods, 2nd Edition

This document is a reference method for the evaluation of automated differential counters, based on the visual differential count.

This reaffirmed document has been reviewed and confirmed as suitable to remain published without revision to content, as of September 2016. The document’s next scheduled review is generally five years after the reaffirmation date.

This document is available in electronic format only.

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Chairholder: John A. Koepke, MD

Date of Publication: January 18, 2007

Order Code PDF: CLSI H20A2E
ISBN Number: 1-56238-628-X

Order Code Print: print not available

Edition: Second

Pages: 76

CLSI H20 Additional Details

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The U.S. Food and Drug Administration (FDA) has evaluated and recognized this approved-level consensus standard for use in satisfying a regulatory requirement.

CLSI H20 Abstract

Clinical and Laboratory Standards Institute document H20-A2—Reference Leukocyte (WBC) Differential Count (Proportional) and Evaluation of Instrumental Methods; Approved Standard—Second Edition evaluates automated and semiautomated hematology instruments for their capability to perform an acceptable leukocyte (WBC) differential count. The standard focuses on WBC found in blood films. The standard presents a detailed description of an acceptable manual-visual WBC differential count, which serves as the reference for the instrumental differential counter. The types of abnormalities for inclusion are outlined.