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Immature Reticulocyte Fraction
MessageHematology
Test Code
IRF
Alias/See Also
None
Preferred Specimen
Lavender Top (EDTA), Whole Blood - 3 mL
Minimum Volume
1.5 mL
Instructions
Gently invert tube 8-10 times immediately after drawing to prevent clotting
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Clotted
Drawn in expired tube
Hemolyzed, icteric or lipemic
Contaminated
Drawn in expired tube
Hemolyzed, icteric or lipemic
Contaminated
Setup Schedule
Monday through Sunday; Continuously
Report Available
Daily, Less than 4 hours.
Clinical Significance
IRF is the rate of production of reticulocytes which largely depends on the bone marrow response to erythropoietin.
Values above normal range indicate an increase production of RBC by the bone marrow.
Values above normal range indicate an increase production of RBC by the bone marrow.
