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Test Code 3501 Reticulocyte Count, Blood

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Sysmex XN (Electrical Impedance)


Literature References:

Resource Manual:  Sysmex XN-Series Automated Hematology Systems, Document Number:  1002-LSS, Rev. 2, January 2013

Specimen Requirements

Specimen Type: Whole blood
Container/Tube: Lavender top (EDTA)-Pink-top (EDTA) tube is not acceptable.

Specimen Volume: Full tube

Specimen Minimum Volume: 1 mL
Collection Instructions: Immediately invert tube several times to mix blood.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time (STAT, Routine)   

STAT: 1 hour after receipt in laboratory

Routine: 2-4 hours after receipt in laboratory

Reference Values

Retic %:  0.5%-1.8% of total red cells

Retic absolute:  0.020-0.087 m/cumm

Literature References:

1. Williams J, et al. Hematology, New York: The McGraw-Hill Companies, 1972;1361.

2. Wolfetal P. Practical clinical hematology-interpretations and techniques. New York, John Wiley and Sons, 1973;307-8.

3. McKenzie S. Clinical laboratory hematology, Pearson Prentice Hall, 2004;54-6.

Test Classification and CPT Coding


Additional Information

For BJH Laboratory Use Only

Alternate Tube:

If pink-top (EDTA) tube is available, testing can be performed manually.

Analyte Stability:

<24 hours refrigerated

Laboratory Processing Instructions:
Test performed in BJH IOH Core Laboratory

Specimen Transport Temperature


LOINC Code Information

Name LOINC Code
Reticulocyte % 17849-1
Reticulocyte # 60474-4