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U.S. Department of Health and Human Services

Recognized Consensus Standards

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Part B: Supplementary Information Sheet (SIS)
FR Recognition List Number 028 Date of Entry 03/16/2012 
FR Recognition Number 7-165
Standard
CLSI H20-A2 (Replaces H20-A)
Reference Leukocyte (WBC) Differential Count (Proportional) and Evaluation of Instrumental Methods; Approved Standard - Second Edition
Extent of Recognition
Complete standard
Rationale for Recognition
This document is a reference method for the evaluation of automated differential counters, based on the visual differential count.
Public Law, CFR Citation(s) and Procode(s)*
Regulation Number Device Name Device Class Product Code
§864.5260 Device, Automated Cell-Locating Class 2 JOY
§864.5220 Counter, Differential Cell Class 2 GKZ
Relevant FDA Guidance and/or Supportive Publications*
Points to Consider for Consider for Collection of Data in Support of In-Vitro Device Submissions for 510(k) Clearance, Issued September 1994.

Class II Special Controls Guidance Document: Premarket Notifications for Automated Differential Cell Counters for Immature or Abnormal Blood Cells; Final Guidance for Industry and FDA, Issued December 2001.
FDA Technical Contact
 Jeb Monasterial
  FDA/OC/CDRH/OPEQ/OIDRH/DIHD/HB/
  301-796-9677
  jeb.monasterial@fda.hhs.gov
Standards Development Organization
CLSI Clinical Laboratory Standards Institute https://clsi.org/
FDA Specialty Task Group (STG)
InVitro Diagnostics
*These are provided as examples and others may be applicable.
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