Hemoglobin and Hematocrit
H&H, HH
Testing Information
Sample Type
Whole Blood
Test Codes
640045
CPT Code
85014, 85018
Testing Area
Core Lab - Hematology
Test Methodology
Sysmex XN - Impedance and Flow Cytometry
Reference Range
Hemoglobin>15 years, Male: 13.3-17.1 g/dL>15 years, Female: 11.5-15.1 g/dLCritical Value: <7 or >20 g/dLHematocrit:>15 years, Male: 38.9-49.7%>15 years, Female: 34.4-44.2%Critical Value: <18 or >60 %
Expected Turnaround Time
Results Available 24 hours from Receipt at the laboratory.
Specimen Collection Criteria
Collect one lavender top EDTA tube (minimum whole blood: 1 mL). Invert 6-8 times to ensure anticoagulant is well mixed with the blood. Refrigerate while waiting for specimen to be picked up.
Rejection Criteria
Clotted specimens, grossly hemolyzed specimens, quantity not sufficient, improperly labeled
Specimen Validity and Retention
Lavender EDTA Tubes:Room Temperature (20-25°C): 8 HoursRefrigerated (2-8°C): 24 hoursFrozen (-20°C or greater): UnacceptableSpecimens retained for 7 days after testing
Courier Transportation
Transport lavender tube refrigerated (2-8°C)
Clinical Utility
Hemoglobin and Hematocrit values are useful in evaluation of anemia and polycythemia, among other conditions.
