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Complete Blood Count (CBC)

Results continued...

 

Hematocrit (HCT)1
Men:

42%–52% or 0.42–0.52 volume fraction

Women:

36%–48% or 0.36–0.48 volume fraction

Children:

29%–59% or 0.29–0.59 volume fraction

Newborns:

44%–64% or 0.44–0.64 volume fraction

 

Hemoglobin (Hgb)1
Men:

14–17.4 grams per deciliter (g/dL) or 140–174 grams per liter (g/L)

Women:

12–16 g/dL or 120–160 g/L

Children:

9.5–20.5 g/dL or 95–205 g/L

Newborn:

14.5–24.5 g/dL or 145–245 g/L

In general, a normal hemoglobin level is about one-third the value of the hematocrit.

 

Red blood cell indices1
Mean corpuscular volume (MCV)—Adults:

84–96 femtoliters (fL)

Mean corpuscular hemoglobin (MCH)—Adults:

28–34 picograms (pg) per cell

Mean corpuscular hemoglobin concentration (MCHC)—Adults:

32–36 grams per deciliter (g/dL)

 

Red cell distribution width (RDW)1
Normal:

11.5%–14.5%

 

Platelet (thrombocyte) count1
Adults:

140,000–400,000 platelets per mm3 or 140–400 x 109/L

Children:

150,000–450,000 platelets per mm 3 or 150–450 x 109/L

 

Mean platelet volume (MPV)1
Adults:

7.4–10.4 mcm3 or 7.4–10.4 fL

Children:

7.4–10.4 mcm3 or 7.4–10.4 fL

 

Blood smear
Normal:

Blood cells are normal in shape, size, color, and number.

High values

Red blood cell (RBC)
  • Conditions that cause high RBC values include smoking, exposure to carbon monoxide, long-term lung disease, kidney disease, some cancers, certain forms of heart disease, alcoholism, liver disease, a rare disorder of the bone marrow (polycythemia vera), or a rare disorder of hemoglobin that binds oxygen tightly.
  • Conditions that affect the body's water content can also cause high RBC values. These conditions include dehydration, diarrhea or vomiting, excessive sweating, and the use of diuretics. The lack of fluid in the body makes the RBC volume look high. This is sometimes called spurious polycythemia.
White blood cell (WBC, leukocyte)
Platelets
  • High platelet values may be seen with bleeding, iron deficiency, some diseases like cancer, or problems with the bone marrow.

Low values

Red blood cell (RBC)
White blood cell (WBC, leukocyte)
Platelets
  • Low platelet values can occur in pregnancy or idiopathic thrombocytopenic purpura (ITP) and other conditions that affect how platelets are made or that destroy platelets.
  • A large spleen can lower the platelet count.

WebMD Medical Reference from Healthwise

Last Updated: August 06, 2012
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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