What does MCV mean on your blood report? (Mean Corpuscular Volume)

Have you ever picked up a blood test report, looked at the letters and numbers on it, and thought, "What is this?"? You've probably seen three letters: WBC, RBC, HGB, PLT, and MCV. It's normal to feel a little nervous when you see these. So today, let's talk about what the most important of these is, MCV, and what it says about our health.

Simply put, what is MCV?

MCV stands for Mean Corpuscular Volume . It measures the average size of the red blood cells in your blood.

Think of it this way. Our bodies are transported by vehicles, like trucks. These vehicles are red blood cells. So these vehicles are loaded with the "goods" called oxygen and deliver them to every cell in the body. This oxygen is essential for our cells to function and live.

So what the MCV value does is measure the average size of these "trucks" running around your body. Are they like small three-wheelers? Are they like regular trucks? Or are they like large containers? This gives us an idea. The normal size of these red blood cells is very important for them to transport oxygen properly.

If the red blood cells are too small (microcytic) or too large (macrocytic), it can be a sign of a health problem. However, sometimes if your blood sample contains many red blood cells of different sizes, the MCV value may be normal when you take the average value of all of them. That's why doctors don't just look at the MCV value.

MCV is just one part of a larger test.

MCV is not a stand-alone test. This MCV value is measured during the test you usually do called Complete Blood Count (CBC) . The part of this CBC report that describes the red blood cells is called the RBC indices . MCV is one part of these RBC indices.

There are several other important measurements in RBC indices. A doctor will make a decision about your red blood cell count by looking at all of these together.

When should I do an MCV test?

MCV is part of the standard CBC test, so you'll get a reading almost every time you get a blood test.

However, a doctor may be particularly concerned about this value:

• If you always feel tired and lifeless.
• If your skin looks pale.
• If you have difficulty breathing.
• If you have symptoms like headache and dizziness.

These symptoms can be seen in conditions like anemia . So, the MCV value becomes very important in such cases. For example, in iron-deficiency anemia, the MCV value decreases. In vitamin B12 or folate deficiency, the MCV value may increase. Also, in conditions like liver disease, the MCV value may change.

How to prepare for the test? How to take the test

This is a very simple test. There is no special preparation required for the MCV test, as it is part of a routine CBC test. However, if your doctor has ordered other tests (such as blood sugar levels) at the same time, he or she may ask you to fast for a few hours. Your doctor will advise you on this.

The test is done like this:

1. A doctor or nurse will choose a spot on your arm where a vein can be clearly seen.

2. Clean the area with an alcohol swab.

3. Then, use a rubber band to tighten the upper arm slightly. This will make the veins stand out clearly.

4. Using a very small needle, the required amount of blood is taken from the vein into a small tube. You will only feel a slight prick.

5. After the blood is drawn, the needle is removed, a piece of cotton is placed in the area, and a plaster is applied.

The entire procedure should take no more than five minutes. After that, you can go home as normal. Some people may feel a little dizzy, but you should wait until that goes away. You may feel a little sore and possibly a little blue where the blood was drawn. This will go away completely in a day or two. It's nothing to worry about.

Let's understand the MCV report: What do these numbers mean?

The MCV value on your report is shown as a number. It is measured in femtoliters (femtoliters - fl) . You don't need to think too much about that word. What matters is the number.

The average MCV value for a healthy adult should be between 80 fl and 100 fl.

But remember, this range can vary slightly from lab to lab, so compare it to the "normal range" listed on your report.

What happens if the MCV value is low? (Low MCV)

If your MCV is less than 80 fl , it means your red blood cells are smaller than normal. This condition is medically known as microcytosis . "Micro" means small.

Things that can cause this are:

• Iron-deficiency anemia: This is the main and most common cause of a low MCV. Iron is essential for the production of red blood cells. When there is not enough iron, the cells produced become smaller in size.
• Thalassemia: This is a hereditary condition. It is caused by a defect in the production of hemoglobin.
• Other hemoglobin-related conditions.

What happens if the MCV value is high? (High MCV)

If your MCV is greater than 100 fl , it means your red blood cells are larger than normal. This condition is called macrocytosis . "Macro" means large.

Things that can cause this are:

• Vitamin B12 deficiency: Vitamin B12 is essential for the proper division and formation of red blood cells. When it is not enough, the cells do not divide properly and become larger.
• Folate deficiency: Like vitamin B12, this is essential for the production of red blood cells.
• Liver disease: Impaired liver function is also a cause of increased MCV.
• Bone marrow dysfunction: For example, conditions like myelodysplastic syndrome .
• Some chemotherapy treatments for cancer can also temporarily increase MCV values.

Your doctor will use the MCV value, along with other values ​​such as MCH, MCHC, RDW, your symptoms, and other tests if necessary, to come to an accurate conclusion about your condition. Therefore, always show your report to a doctor and discuss it.