Sign in →

Test Code H/H Hemoglobin and Hematocrit

Aliases

H&H

Useful For

Hemoglobin measures the level of hemoglobin in the blood. Hematocrit is used to determine the ratio of volume of red blood cells to the total volume of blood.

Collection Method

Venous draw, Capillary Draw

Minimum Volume

Adult: 1 mL, Pediatric 300 uL

Container

Purple (EDTA)

Preferred Specimen

Whole Blood

Acceptable Specimens

EDTA Whole Blood, BD EDTA MAP tube

Reference or Target Ranges

Hemoglobin      
Males   Females  
Birth – 7 days 13.5 – 22.0 g/dL Birth – 7 days 13.5 – 22.0 g/dL
8 – 14 days 12.5 – 21.0 g/dL 8 – 14 days 12.5 – 21.0 g/dL
15 days – 1 month 10.0 – 20.0 g/dL 15 days – 1 month 10.0 – 20.0 g/dL
2 – 5 months 10.0 – 14.0 g/dL 2 – 5 months 10.0 – 14.0 g/dL
6 months – 1 year 10.5 – 13.5 g/dL 6 months – 1 years 10.5 – 13.5 g/dL
2 years 11.0 – 14.0 g/dL 2 years 11.0 – 14.0 g/dL
3 – 5 years 11.0 – 14.5 g/dL 3 – 5 years 11.8 – 14.7 g/dL
6 – 11 years 12.0 – 14.0 g/dL 6 – 11 years 12.0 – 14.5 g/dL
12 – 15 years 12.8 – 16.0 g/dL 12 – 15 years 12.2 – 14.8 g/dL
Adults 13.5 – 17.5 g/dL Adults 12.0 – 15.5 g/dL
Hematocrit      
Males   Females  
Birth – 7 days 42.0 – 60.0% Birth – 7 days 42.0 – 60.0%
8 – 14 days 39.0 – 60.0% 8 – 14 days 39.0 – 60.0%
15 days – 1 month 31.0 – 55.0% 15 days – 1 month 31.0 – 55.0%
2 – 5 months 28.0 – 42.0% 2 – 5 months 28.0 – 42.0%
6 months – 1 year 33.0 – 40.0% 6 months – 1 years 33.0 – 40.0%
2 years 33.0 – 42.0% 2 years 33.0 – 42.0%
3 – 5 years 33.0 – 43.0% 3 – 5 years 35.0 – 44.0%
6 – 11 years 35.8 – 42.4% 6 – 11 years 35.7 – 43.0%
12 – 15 years 37.3 – 47.3% 12 – 15 years 36.3 – 43.3%
Adults 38.8 – 50.0% Adults 34.9 – 44.5%

Reportable Units

% (Hct) / g/dL (Hgb)

Critical Value

Parameter Low value High value
Hematocrit (any age) <21% >65%
Hematocrit (0 – 24 hours) <42% >65%
Hemoglobin (8 weeks and up) <6 g/dL >21 g/dL
Hemoglobin (0 – 8 weeks) <7 g/dL >24 g/dL

Reasons for Rejection

Hemolysis Threshold N/A
Icterus Threshold N/A
Lipemia Threshold N/A
Other Clotted; QNS, Contaminated; Improperly labeled

Specimen Stability

Ambient Up to 24 hours at room temperature
Refrigerated (4°C to 8°C) 24 Hours
Frozen(-70°C to 0°C) N/A

Performance Information

Days and Time Performed 24/7
Expected Turn Around Time Stat within 1 hour of arrival in lab
Expedite within 2 hours of arrival  in lab
Routine within 4 hours of arrival in lab
Stat Availabilty Yes
Performing Bench UH, WCH Hematology
Methodology/Method Description Sysmex – Hematocrit (HCT) is measured as a ratio of the
total RBC volume to whole blood using cumulative pulse height detection. Hemoglobin (HGB) is converted to SLS-hemoglobin and read photometrically.

Special Handling

Room Temp

CPT Codes

85014, 85018