Hematological Parameters

Question 1

RBC count

Answer 1

♂: 4.3–5.9 million/mm3 (4.3–5.9 x 1012/L)
♀: 3.5–5.5 million/mm3 (3.5–5.5 x 1012/L)

Absolute number of RBCs contained in a certain volume of blood

Question 2

Hemoglobin (Hb)

Answer 2

♂: 13.5–17.5 g/dL (2.09–2.71 mmol/L)
♀: 12–16 g/dL (1.86–2.48 mmol/L)

Oxygen-transporting protein found in RBCs
Contains heme

Question 3

Hematocrit (Hct)

Answer 3

♂: 41%–53% (0.41–0.53)
♀: 36%–46% (0.36–0.46)

Ratio of RBC volume to total blood volume

Question 4

Mean corpuscular volume (MCV)

Answer 4

80–100 μm3 (80–100 fL)

Average volume of an RBC

Question 5

Mean corpuscular hemoglobin (MCH)

Answer 5

25.4–34.6 pg/cell (0.39–0.54 fmol/cell)

Average mass of hemoglobin in each RBC

Question 6

Mean corpuscular hemoglobin concentration (MCHC)

Answer 6

31–36% Hb/cell (4.81-5.58 mmol Hb/L)

MCHC = Hb/Hct
Measure for the hemoglobin concentration of all RBCs.

Question 7

Reticulocyte count

Answer 7

0.5–1.5% (0.005–0.015)

Represents erythropoietic activity

Question 8

Absolute reticulocyte count

Answer 8

50–100 x 109/L

Absolute number of reticulocytes contained in a certain volume of blood
In cases of anemia, more accurate than reticulocyte count expressed as a percent

Question 9

Corrected reticulocyte count

Answer 9

0.5–1.5% (0.005–0.015)

Same range as reticulocyte count

Used in cases of anemia: evaluates the reticulocyte count in context of hematocrit
Calculation: reticulocyte count (in %) x (patient Hct/normal Hct)

Question 10

Reticulocyte production index (RPI)

Answer 10

Individuals without anemia: 1
Individuals with anemia [2]
≥ 2 is a normal value.
< 2 is an abnormal value.

Measures adequate erythrocyte production in response to anemia

Question 11

Red blood cell distribution width (RDW)

Answer 11

11–15%

Measures the variation in RBC volumes

Question 12

WBC count

Answer 12

4,500–11,000/mm3 (4.5–11.0 x 109/L)

Leukocytosis: WBC count > 11,000/mm3
Causes: 
Infections
Sepsis 
Leukemia

Question 13

Segmented neutrophil count

Answer 13

54–62%

Question 14

Band neutrophil count

Answer 14

3–5% (0.03–0.05)

Question 15

Eosinophil count

Answer 15

1–3%

Question 16

Basophil count

Answer 16

0–0.75%

Question 17

Lymphocyte count

Answer 17

25–33%

Question 18

Monocyte count

Answer 18

3–7%

Question 19

Platelet count

Answer 19

150,000–400,000/mm3 (150–400 x 109/L)