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Test Mnemonic CBCR Complete Blood Count (CBC), with Reflex Differential, Blood

Methodology

Includes WBC, RBC, hemoglobin, hematocrit, MCV, MCH, MCHC, RDW, MPV, platelet count with reflex differential.

Clinical Significance:

Evaluation of anemia, leukemia, reaction to inflammation and infections, peripheral blood cellular characteristics, state of hydration and dehydration, polycythemia, hemolytic disease of the newborn, and ABO incompatibilities.

Performing Laboratory

Hallmark Health

Physician Office Specimen Requirements

Container/Tube:  Lavender-top (EDTA) tube - Hemolyzed, clotted, specimen diluted with intravenous fluid, or tube that is not filled with minimum volume is not acceptable.

Specimen:  Full tube

Transport Temperature:  Refrigerate

Collection Instructions:  Immediately and gently invert 6 to 8 times to mix blood. If there is a delay in transport, store specimen ambient.

Note:  Lavender-top (EDTA) tube will be the last in the order of the draw.

Reference Values

WBC

0 days-2 months:  5.0-21.0 K/µL

2-6 months:  5.0-20.0 K/µL

6 months-12 years:  4.5-13.5 K/µL

≥12 years:  4.5-11.0 K/µL

Note:  If WBC is <3,000 or >20,000 test is reflexed to automated differential.

RBC

Males

0 days:  3.9-5.4 M/µL

1 day-1 month:  3.0-6.3 M/µL

1-6 months:  2.7-4.9 M/µL

6 months-2 years:  3.7-5.4 M/µL

2-6 years:  3.9-5.3 M/µL

6-12 years:  4.0-5.2 M/µL

≥12 years:  4.4-5.9 M/µL

Females

0 days:  3.9-5.4 M/µL

1 day-1 month:  3.0-6.3 M/µL

1-6 months:  2.7-4.9 M/µL

6 months-2 years:  3.7-5.4 M/µL

2-6 years:  3.9-5.3 M/µL

6-12 years:  4.0-5.2 M/µL

≥12 years:  3.8-5.2 M/µL

HEMOGLOBIN

Males

0 days:  13.5-19.5 g/dL

1 day-1 month:  10.0-21.5 g/dL

1-6 months:  9.0-14.0 g/dL

6 months-2 years:  10.5-13.5 g/dL

2-12 years:  11.5-13.5 g/dL

≥12 years:  13.5-17.5 g/dL

Females

0 days:  13.5-19.5 g/dL

1 day-1 month:  10.0-21.5 g/dL

1-6 months:  9.0-14.0 g/dL

6 months-2 years:  10.5-13.5 g/dL

2-12 years:  11.5-13.5 g/dL

≥12 years:  11.7-15.7 g/dL

HEMATOCRIT

Males

0 days:  42.0-60.0%

1 day-1 month:  31.0-66.0%

1-6 months:  28.0-42.0%

6 months-2 years:  33.0-39.0%

2-6 years:  34.0-40.0%

6-12 years:  35.0-45.0%

≥12 years:  39.8-52.2%

Females
0 days:  42-60.0%

1 day-1 month:  31.0-66.0%

1-6 months:  28.0-42.0%

6 months-2 years:  33.0-39.0%

2-6 years:  34.0-40.0%

6-12 years:  35.0-45.0%

≥12 years:  34.9-46.9%

MCV

Males

0 days:  98.0-118.0 fL

1 day-1 month:  85.0-126.0 fL

1-6 months:  74.0-126.0 fL

6 months-2 years:  70.0-86.0 fL

2-6 years:  75.0-87.0 fL

6-12 years:  77.0-95.0 fL

≥12 years:  80.5-99.7 fL

Females

0 days:  98.0-118.0 fL

1 day-1 month:  85.0-126.0 fL

1-6 months:  74.0-126.0 fL

6 months-2 years:  70.0-86.0 fL

2-6 years:  75.0-87.0 fL

6-12 years:  77.0-95.0 fL

≥12 years:  80.0-100.0 fL

MCH

Males

0 days:  31.0-37.0 pg

1 day-1 month:  28.0-40.0 pg

1-6 months:  26.0-35.0 pg

6 months-2 years:  23.0-31.0 pg

2-6 years:  24.0-30.0 pg

6-12 years:

≥12 years:  26.6-33.8 pg

Females

0 days:  31.0-37.0 pg

1 day-1 month:  28.0-40.0 pg

1-6 months:  26.0-35.0 pg

6 months-2 years:  23.0-31.0 pg

2-6 years:  24.0-30.0 pg

6-12 years:

≥12 years:  26.4-34.0 pg

MCHC

Males

0 days:  30.0-36.0 g/dL

1 day-1 month:  28.0-38.0 g/dL

1-6 months:  29.0-37.0 g/dL

6 months-2 years:  30.0-36.0 g/dL

2-12 years:  31.0-37.0 g/dL

≥12 years:  31.5-36.3 g/dL

Females

0 days:  30.0-36.0 g/dL

1 day-1 month:  28.0-38.0 g/dL

1-6 months:  29.0-37.0 g/dL

6 months-2 years:  30.0-36.0 g/dL

2-12 years:  31.0-37.0 g/dL

≥12 years:  31.4-35.8 g/dL

RDW

0 days-adults:  11.0-15.0%

PLATELET COUNT

0 days-adults:  130-400 K/µL

MPV

0 days-adults:  9.0-11.8 fL