Test Detail
Overview
Interpreting Results
Tests Included

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Written by
Dr. Betina Chandolia
BDS, MDS - Oral Pathology and Microbiology
Reviewed by
Dr. Ashish Ranjan
MBBS, MD (Pharmacology)
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Complete Blood Count

(CBC)
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CBC Test Includes 24 testsView All
Complete Blood Count
You need to provide
Blood
This test is for
Male, Female
Test Preparation
  1. No special preparation required

Overview


What is CBC?

A complete blood count (CBC) test is a group of tests that provides information about blood cells like Red Blood Cells (RBC), White Blood Cells (WBC) and platelets. It is routinely performed to provide an overview of a patient's general health status.

Why is CBC done?

  • To monitor your overall health as part of a routine check-up

  • To help detect a variety of disorders including infections, anemia, diseases of the immune system, and blood cancers

  • To monitor an existing blood disorder

  • To monitor treatment that is known to affect blood cells such as chemotherapy or radiotherapy


What does CBC Measure?

Blood is composed of blood cells suspended in blood plasma (yellowish coloured liquid). The blood cells include red blood cells (also called RBCs or erythrocytes), white blood cells (also called WBCs or leukocytes) and platelets (also called thrombocytes).

Red blood cells (RBCs) are the most abundant blood cells. RBCs contain the hemoglobin which helps in the transportation of oxygen to the tissues. RBC count is the measurement of number of RBCs in a given volume of blood.

Packed Cell Volume (PCV) or Hematocrit (Hct) is the measurement of the blood volume occupied by RBCs. It is expressed in percentage.

White blood cells (WBCs) are key components of the immune system and thus protect the body from various infections and cancers. Total Leucocyte count (TLC) is the measurement of the total number of leukocytes (WBCs) in a given volume of blood.

There are five types of WBCs:

  1. Neutrophils

  2. Basophils

  3. Eosinophils

  4. Lymphocytes

  5. Monocytes

Differential Leucocyte Count (DLC) determines the percentage of different types of WBCs.

Neutrophils, Basophils, and Eosinophils are called Granulocytes because of the presence of granules inside these cells.

Absolute count of different types of WBCs is the measurement of their absolute numbers in the given volume of blood.

Platelet count - Platelets (also called thrombocytes) are disc-shaped cell fragments without a nucleus that help in blood clotting. Platelet count is the measurement of the number of platelets in a given volume of blood.

Mean Platelet Volume (MPV) is a measurement of the average size of platelets.

Hemoglobin (Hb) -  Hemoglobin (Hb) is a protein found in red blood cells (RBCs) that carries oxygen from the lungs to the body tissues, exchanges the oxygen for carbon dioxide, and then carries  the carbon dioxide back to the lungs where it is exchanged for oxygen.

Mean Corpuscular Volume (MCV) is the average volume of a red blood cell.

Mean Corpuscular Hemoglobin (MCH) is the average amount of hemoglobin in the average red blood cell.

Mean Corpuscular Hemoglobin Concentration (MCHC) is the average concentration of hemoglobin in a given volume of red cells.

Red Cell Distribution Width (RDW)is a measurement of the variability of red blood cell size

Interpreting CBC results


Interpretations

Hemoglobin

  • Males: 13.2 - 16.2 gm/dL

  • Females: 12.0 - 15.2 gm/dL

Red Blood Cell Count (RBC)

  • Males: 4.3  - 6.2  million/μL

  • Females: 3.8  - 5.5 million/μL

  • Infant/Child: 3.8 - 5.5 million/μL

White Blood Cell Count (WBC)

  • Differential Leucocyte Count

        - Neutrophils - 35-80%

        - Lymphocytes - 20-50%

        - Monocytes - 2-12%

        - Eosinophils - 0-7%

        - Basophils - 0-2%

Platelet Count (Plt) - 1.5 - 4.5 lacs/μL

Hematocrit (Hct)

  • Males: 40-52%

  • Females: 37-46%

  • Child: 31-43%

Red Cell Distribution Width (RDW) - 35-47 fL

Mean Corpuscular Volume (MCV)

  • Males: 82-102 fL

  • Females: 78-101 fL

Mean Corpuscular Hemoglobin (MCH) - 27-34 pg

Mean Corpuscular Hemoglobin Concentration (MCHC) - 31-35 gm/dL

Mean Platelet Volume (MPV) - 6.0-9.5 fL

Meaning of Abnormal CBC Test Results

  • Hemoglobin

Decreased levels - Anemia

Increased levels - Polycythemia

  • WBC

 Decreased levels - Aplastic anemia, Bone marrow disorders, Autoimmune conditions
Increased levels - Infections, Inflammatory disorders, Leukemia, Myeloproliferative disorders
  • Neutrophil count

Decreased levels (Neutropenia) - Aplastic anemia, Autoimmune disorders, Drug reactions or Chemotherapy
Increased levels  (Neutrophilia) - Acute bacterial infections, Inflammation, Burns
  • Lymphocyte count

Decreased levels (Lymphopenia) - Bone marrow damage, Aplastic anemia, Autoimmune disorders
Increased levels (Lymphocytosis) - Acute viral infections, Tuberculosis, Lymphocytic leukemia
  • Monocyte count

Decreased levels - Bone marrow damage
Increased levels (Monocytosis) - Chronic infections like tuberculosis, Bacterial endocarditis, Collagen vascular disorders, Inflammatory bowel diseases
  • Eosinophil count

Decreased levels - Rare and medically insignificant
Increased levels (Eosinophilia) - Asthma, Allergies, Drug reactions, Parasitic infections
  • Basophil count

Decreased levels - Medically insignificant
Increased levels (Basophilia) - Chronic myeloid leukemia (CML)
  • Platelet count

Decreased levels (Thrombocytosis) - Blood Loss, Chronic Infection or Inflammatory Disease, Removal of spleen
Increased levels (Thrombocytopenia) - Viral infections like dengue fever, bleeding or Platelet disorders

Tests Included (24 tests)


  • Differential leucocyte Count(includes 6 tests)

    Differential Neutrophil Count

    Differential Lymphocyte Count

    Differential Monocyte Count

    Differential Granulocyte Count

    Differential Eosinophil Count

    Differential Basophil Count

  • Absolute Monocyte Counts
  • RDW SD
  • Red Blood Cell Count
  • Platelet Count
  • Packed Cell Volume
  • Hemoglobin
  • Total Leucocyte Count
  • Red Cell Distribution Width
  • Mean Corpuscular Volume
  • Mean Corpuscular Hemoglobin
  • Mean Corpuscular Hemoglobin Concentration
  • Mean Platelet Volume
  • Absolute Leucocyte Count(includes 6 tests)

    Absolute Eosinophil Count

    Absolute Lymphocyte Count

    Absolute Basophil Count

    Absolute Granulocyte Count

    Absolute Monocyte Count

    Absolute Neutrophil Count


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