An MCV (Mean Corpuscular Volume) test is a blood test that measures the average size of your red blood cells. Red blood cells are responsible for carrying oxygen from your lungs to every cell in your body. Your cells need oxygen to grow, reproduce, and stay healthy.
The MCV test is part of a complete blood count (CBC), which is a routine screening test that helps to evaluate your overall health.
Why is an MCV test done?
An MCV test is done to help diagnose anemia, a condition in which you don't have enough healthy red blood cells to carry oxygen to your tissues.
What do the results of an MCV test mean?
- Low MCV: This may indicate microcytic anemia, meaning that your red blood cells are smaller than normal. This can be caused by iron deficiency, thalassemia, or lead poisoning.
- Normal MCV: This means your red blood cells are a normal size.
- High MCV: This may indicate macrocytic anemia, meaning that your red blood cells are larger than normal. This can be caused by vitamin B12 deficiency, folate deficiency, or liver disease.
How is an MCV test done?
To perform an MCV test, a healthcare professional will draw a small sample of blood from a vein in your arm. The blood sample is then analyzed in a laboratory.
What are the risks of an MCV test?
The risks of an MCV test are minimal. You may feel a slight sting when the needle is inserted, and there is a small risk of bruising or bleeding at the injection site.
