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Test Code RETLMW Reticulocyte Count LAB296

Test Method

Sysmex XN Systems:

  • Reticulocyte Count: Flow cytometry

Specimen Requirement

EDTA whole blood is required.

Additional Specimen Collection Information

Whole blood collected in EDTA purple-top tube. The
tube must be at least one quarter full to be acceptable for
testing.

Capillary specimen collected in EDTA microtube. The 
tube must contain at least 375 mcL (bottom line) to be
acceptable for testing.

Reference Values

0-14 Days: 239-404 x thou/mcL

14 Days-12 Years: 46-154 x thou/mcL

≥ 12 Years: 59 – 146 x thou/mcL

Performance

Testing is performed Monday through Sunday.

Routine orders: Typically completed within 4 hours after the
specimen arrives at the testing site.

Expedite orders: Typically completed within 1 hour after the
specimen arrives at the testing site.

STAT orders: Typically completed within 30 minutes after
the specimen arrives at the testing site.

Useful For

Monitoring reticulocyte count

Screening tool to confirm a hematologic disorder.

Establish or rule out a diagnosis.

Detect an unsuspected hematologic disorder.

Monitor effects of radiation or chemotherapy.

LOINC Code Information

60474-4 Reticulocytes [#/volume] in Blood By Automated Count

CPT Code Information

85045 Blood Counts: reticulocyte, automated