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Hemoglobin
Test Code510
CPT Codes
85018
Preferred Specimen
Whole blood from a full EDTA (lavender-top) tube
Minimum Volume
1 mL
Other Acceptable Specimens
Whole blood from a full EDTA (tan-top) tube
Instructions
Maintain specimen at room temperature. Do not refrigerate. If multiple draw, collect EDTA (lavender-top) tube last. Traumatic draw can introduce thromboplastin and trap WBC and platelets. Refrigeration can precipitate fibrin and trap WBC and platelets.
Note: If drawn with lead testing, EDTA (tan-top) is required.
Note: If drawn with lead testing, EDTA (tan-top) is required.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 48 hours
Refrigerated: 48 hours (may cause platelet clumping)
Frozen: Unstable
Refrigerated: 48 hours (may cause platelet clumping)
Frozen: Unstable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Clotted • Received frozen
Methodology
Electronic Cell, Sizing/Cytometry/Microscopy
Setup Schedule
Set up: Mon-Sat; Report Available: 1 day
Clinical Significance
Usual method for determining anemia. Used to calculate indices.
