Category: Laboratory Tests Suggested Reading Time: 4 minutes
What Is a Complete Blood Count and Why Is It Done?
A Complete Blood Count, commonly known as a CBC, is one of the most frequently recommended blood tests. It evaluates different components of blood and provides useful information about general health.
Doctors may recommend a CBC as part of a routine health check-up or to investigate specific symptoms.
What Does a CBC Test Measure?
A Complete Blood Count generally measures or evaluates:
- Red Blood Cells: Help transport oxygen throughout the body
- White Blood Cells: Play an important role in the immune system
- Hemoglobin: A protein in red blood cells that carries oxygen
- Hematocrit: The proportion of blood made up of red blood cells
- Platelets: Help the blood clot properly
- Mean Corpuscular Volume: Provides information about the average size of red blood cells
Why Might a Doctor Recommend a CBC?
A healthcare professional may recommend a CBC to help evaluate:
- Unexplained tiredness or weakness
- Fever or suspected infection
- Symptoms associated with anemia
- Bleeding or bruising concerns
- General health status
- Response to certain treatments
Is Any Special Preparation Required?
In many cases, fasting is not required for a CBC alone. However, if the CBC is ordered along with other tests, fasting or other preparation may be necessary. Always follow the instructions provided by your doctor or diagnostic laboratory.
Understanding Your Results
CBC results should be interpreted according to the laboratory’s reference ranges, your symptoms, age, medical history, and other clinical information. A healthcare professional can explain what the results mean for you.
Do not self-diagnose based on a laboratory report.