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HelpTest ID RETB Reticulocyte Profile, Blood
Specimen Required
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.
Reporting Name
Reticulocyte Profile, BSpecimen Type
Whole Blood EDTASpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood EDTA | Refrigerated (preferred) | 48 hours |
| Ambient | 24 hours |
Report Available
1 dayPerforming Laboratory
Mayo Clinic Laboratories in Rochester
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| RETB | Reticulocyte Profile, B | 50262-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| PRTIC | Reticulocytes, B | 17849-1 |
| ARTIC | Absolute Reticulocyte | 60474-4 |
| IRF1 | Immature Retic Fraction | 33516-6 |
| RETHB | Reticulocyte Hemoglobin | 71694-4 |
| RBC | Erythrocytes | 789-8 |
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Kidney Transplant Test Request
-Benign Hematology Test Request (T755)
Useful For
Assessing erythropoietic bone marrow activity in anemia and other hematologic conditions
Assessment of acute iron deficiency
Monitoring early response to iron therapy or erythropoiesis-stimulating agents
Early monitoring of therapy for nutritional anemias (eg, megaloblastic, iron deficiency) where immature reticulocyte fraction precedes reticulocyte count increase by several days
Monitoring therapeutic efficacy of erythropoietin treatment
Monitoring early engraftment after bone marrow transplantation
Day(s) Performed
Monday through Sunday
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
85046
Specimen Minimum Volume
0.5 mL
Reference Values
% RETICULOCYTES
1-3 days: 3.47-5.40%
4 days-4 weeks: 1.06-2.37%
5 weeks-7 weeks: 2.12-3.47%
8 weeks-5 months: 1.55-2.70%
6 months-23 months: 0.99-1.82%
24 months-5 years: 0.82-1.45%
6-11 years: 0.98-1.94%
12-17 years: 0.90-1.49%
Adults: 0.60-2.71%
ABSOLUTE RETICULOCYTES
1-3 days: 147.5-216.4 x 10(9)/L
4 days-4 weeks: 51.3-110.4 x 10(9)/L
5 weeks-7 weeks: 51.8-77.9 x 10(9)/L
8 weeks-5 months: 48.2-88.2 x 10(9)/L
6 months-23 months: 43.5-111.1 x 10(9)/L
24 months-5 years: 36.4-68.0 x 10(9)/L
6-11 years: 42.4-70.2 x 10(9)/L
12-17 years: 41.6-65.1 x 10(9)/L
Adults: 30.4-110.9 x 10(9)/L
IMMATURE RETICULOCYTE FRACTION (IRF)
1-3 days: 30.5-35.1%
4 days-4 weeks: 14.5-24.6%
5 weeks-2 months: 19.1-28.9%
3-5 months: 13.4-23.3%
6 months-<2 years: 11.4-25.8%
2-<6 years: 8.4-21.7%
6-<12 years: 8.9-24.1%
12-<18 years: 9.0-18.7%
≥ 18 years:
Female:3.0-15.9%
Male: 2.3-13.4%
RETICULOCYTE HEMOGLOBIN
Males:
1 day-5 months: 27.6-38.7 pg
6 months-<2 years: 28.7-35.7 pg
2-<6 years: 27.7-37.8 pg
6-<12 years: 32.4-37.6 pg
12-<18 years: 30.0-37.6 pg
Adults: 30.0-37.6 pg
Females:
1 day-5 months: 29.2-37.5 pg
6 months-<2 years: 30.1-35.7 pg
2-<6 years: 29.3-37.3 pg
6-<12 years: 30.4-39.7 pg
12-<18 years: 30.0-37.6 pg
Adults: 30.0-37.6 pg
RED BLOOD CELL COUNT (RBC)
Males:
0-14 days: 4.10-5.55 x 10(12)/L
15 days-4 weeks: 3.16-4.63 x 10(12)/L
5 weeks-7 weeks: 3.02-4.22 x 10(12)/L
8 weeks-5 months: 3.43-4.80 x 10(12)/L
6 months-23 months: 4.03-5.07 x 10(12)/L
24 months-35 months: 3.89-4.97 x 10(12)/L
3-5 years: 4.00-5.10 x 10(12)/L
6-10 years: 4.10-5.20 x 10(12)/L
11-14 years: 4.20-5.30 x 10(12)/L
15-17 years: 4.30-5.70 x 10(12)/L
Adults: 4.35-5.65 x 10(12)/L
Females:
0-14 days: 4.12-5.74 x 10(12)/L
15 days-4 weeks: 3.32-4.80 x 10(12)/L
5 weeks-7 weeks: 2.93-3.87 x 10(12)/L
8 weeks-5 months: 3.45-4.75 x 10(12)/L
6 months-23 months: 3.97-5.01 x 10(12)/L
24 months-35 months: 3.84-4.92 x 10(12)/L
3-5 years: 4.00-5.10 x 10(12)/L
6-10 years: 4.10-5.20 x 10(12)/L
11-14 years: 4.10-5.10 x 10(12)/L
15-17 years: 3.80-5.00 x 10(12)/L
Adults: 3.92-5.13 x 10(12)/L
Method Name
Flow Cytometry