A complete blood count (CBC) is one of the most common blood tests that allow doctors to evaluate the overall health of a patient. CBC is used to find out the levels of cells in the blood, including the red blood cells, white blood cells, and platelets. The results of a CBC test help a doctor evaluate a range of health conditions, screen for diseases, and adjust treatments. A CBC test gives you a quick snapshot of your overall health.
A CBC test measures the quantity of three types of cells produced by the bone marrow and released into the blood:
CBC is a useful test that helps to indicate if your blood is normal or if there are signs of a problem. It is usually performed before and after the surgery. Here is the list of health problems that can be identified by a CBC test.
After a blood sample is taken from a person, it is analyzed in a medical laboratory.
The following are normal CBC results for adults:
White blood cells: 4,500 to 11,000 cells per microliter (cells/mcL)
Red blood cells:
Male: 4.5 million to 5.9 million cells/mcL
Women: 4.1 million to 5.1 million cells/mcL
Male: 14 to 17.5 grams per deciliter (gm/dL) for men
Women: 12.3 to 15.3 gm/dL for women
Male: 41.5% to 50.4%
Women: 35.9% to 44.6%
Mean corpuscular volume: 80 to 96
Platelets: 150,000 to 450,000 platelets/mcL
If a result shows CBC too high or too low, it could signal a wide range of conditions and a person’s overall health. If there are signs and symptoms of an underlying problem, your doctor may suggest you undergo a routine checkup. People undergoing treatment for chronic conditions such as chronic kidney disease, ulcerative colitis, or rheumatoid arthritis, may have to visit a doctor regularly for a CBC checkup.
CBC is a fairly quick test that is conducted in most pathology laboratories. It is advisable to wear short-sleeved clothes during the test. A patient can have normal food and can have a normal intake of fluids as well. You are not required to fast unless there are some other tests to be done at the same time.
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