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Reference Ranges for the Complete Blood Count and Other Common Tests

written by: A. Jitesh•edited by: Emma Lloyd•updated: 6/26/2010

This blood test reference range chart gives the normal values for several common lab tests, including the complete blood count.

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    Complete Blood Count (CBC)

    An analysis of the composition of various cell types in blood is known as the complete blood count (CBC). The blood test reference range chart for CBC is as under:

    • Red blood cell count 3.8-4.8 ml/microlitre
    • Hemoglobin 12.0-15.0 g/dL
    • Hematocrit 36.0-46.0 %
    • Mean corpuscular volume 83-101 fL
    • Mean corpuscular hemoglobin concentration 31.5-34.5 g/dL
    • Red cell distribution width 11.6-14.0 %
    • Platelet count 150000-410000 /microlitre
    • Mean platelet volume 6.8-10.5 fL
    • White blood cell count 4000-10000 /microlitre
    • Mean corpuscular hemoglobin 27-32 pg
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    Differential WBC Count

    The WBC or White Blood Cells (or Corpuscles) are the cells responsible for immunity and host defence in our body. Very high or low levels of various WBCs are indicative of various disease states. Healthy humans have WBCs in this range:

    • Neutrophils 40-80 %
    • Eosinophils 1 – 6 %
    • Lymphocytes 20-40 %
    • Monocytes 2 – 10 %
    • Basophils <1.0-2.0 %
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    Blood Glucose

    Blood glucose levels are measured for detecting diabetes. In healthy humans, the values are as under:

    • Fasting blood glucose 80-115 mg/dl
    • Post prandial blood glucose <140 mg/dl
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    Serum Lipid Profile

    There are multiple tests which are part of the serum lipid profile:

    • Cholesterol- Levels of <200 mg/dl is desirable whereas levels between 200 to 239 mg/dl counts as borderline high. More than 240 mg/dl is regarded high.
    • Triglycerides- Levels less than 150 mg/dl is normal and between 150-199 mg/dl is borderline high. Levels between 200-499 mg/dl is termed high while anything above 500 mg/dl is very high.
    • HDL cholesterol- Levels less than 40 mg/dl is how whereas anything above that is high.

    • LDL cholesterol- Upto 100 mg/dl is considered optimal and between 100-129 mg/dl is near optimal. Levels between 130-159 mg/dl is borderline high while those between 160-189 is high. Any values above 190 mg/dl is very high.
      • LDL/HDL rati- A patient having a ratio of 0.5-3 is at low risk, 3.1-6 at moderate risk while a ratio of more than 6 is indicative of high risk.
      • Cholesterol/HDL rati- Ratios between 3.3-4.4 is considered low risk, that in the range of 4.5-11 moderate risk whereas ratios above 11 are high risk.

      • Very low density lipoprotein(VLDL) levels should be </=30 mg/dl.

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      Liver Function Tests

      These tests measure the functioning of the liver. The blood test reference range chart for liver function in healthy persons is as under:

      • Serum albumin- 3.4-5.4 g/dl
      • Alanine transaminase(ALT)- 10 – 34 IU/L
      • Aspartate aminotransferase(AST)- 10 – 34 IU/L
      • Gamma glutamyl transpeptidase(GGT)- 0 – 51 IU/L
      • Alkaline phosphatase(ALP)- 44 -147 IU/L
      • Prothrombin time- 11 – 13.5 seconds
      • Serum bilirubin
      1. Direct bilirubin 0 - 0.3 mg/dl
      2. Total bilirubin 0.3 - 1.9 mg/dl
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      Kidney Function Tests

      The two tests performed for measuring kidney functio, and their normal ranges, are as under:

      • Blood urea nitrogen 7 – 20 mg/dl
      • Serum creatinine 0.8 – 1.4 mg/dl
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      Thyroid Profile

      Level of the three thyroid hormones in blood gives as idea of the proper functioning of the thyroid gland. Reference ranges are as under:

      • T3 100-200 ng/dl
      • T4 4.5-11.2 mcg/dl
      • TSH 0.4 - 4.0 mIU/L
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      Serum Electrolyte Profile

      Levels of various electrolytes in blood is indicative of various disease states. The blood test reference range chart of various electrolytes is as under:

      • Serum sodium 135 – 145 mEq/L
      • Serum chloride 96 – 106 mEq/L
      • Serum phosphorus 2.4 – 4.1 mg/dl
      • Serum calcium 8.5 – 10.2 mg/dl
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      References

      1. Medline Plus Medical Encyclopedia
      2. Lab Tests Online
      3. Interpretation of Diagnostic Tests, 8th ed., by Jacques Burton Wallach