Would you like to know exactly what your blood type is?

If someone asked you, "What is your blood type?", would you have an answer? Some people do, but most people don't know for sure. Knowing your blood type is really important these days. Just think, in the event of an accident, surgery, or during pregnancy, this little piece of information could help save your life. So, don't worry, today we will talk about the topic of blood types in a simple way that everyone can understand.

What exactly is a blood type?

Simply put, a blood type is a way of classifying whether your blood is compatible with another person's blood. It's like having a size for clothes.

This classification is mainly influenced by two special types of proteins on the surface of your red blood cells. In medicine, we call these antigens . Think of them as little nametags attached to red blood cells. These two types of nametags are the 'A' antigen and the 'B' antigen .

There are 4 main blood types based on whether or not these antigens are present, and what they are.

• Type A: Red blood cells only have the A antigen.
• Type B: Only has the B antigen.
• Type AB: Has both A and B antigens.
• Type O: Neither A nor B antigens.

In addition, there is another important thing, and that is the Rh factor . This is another protein that can be found on the surface of red blood cells.

• If you have this Rh factor in your blood, your blood type is positive (+) .
• If the Rh factor is absent, the blood type is negative (-) .

When these two come together, the 8 main blood types we've all heard of are formed:

1. A Positive (A+)

2. A Negative (A-)

3. B Positive (B+)

4. B Negative (B-)

5. AB Positive (AB+)

6. AB Negative (AB-)

7. O Positive (O+)

8. O Negative (O-)

Why do blood types need to be compatible?

This is the most important thing. When giving someone blood (Blood Transfusion), it is essential that the blood types of the donor and the recipient match.

Think of your body as a country with a good defense system. Your immune system is the army of that country. This army recognizes every cell in the body. However, if it sees something that does not belong to the body and comes from outside (like a germ), this army attacks and destroys it.

The same thing happens when an incompatible blood type enters the body. For example, if a person with type 'A' blood is given type 'B' blood, the immune system of the person with type 'A' blood will recognize the incoming 'B' blood cells as an enemy. It will then attack and destroy those 'B' blood cells. This reaction can be very severe, causing kidney failure, difficulty breathing, and sometimes even death.

Who is this 'Universal Donor' and 'Universal Recipient'?

O negative (O-) blood type is called the "Universal Donor" . That is, type O- blood can be given to someone with any blood type. Because those blood cells do not have any of the A, B, or Rh antigens that we talked about. So, the body of the person receiving the blood does not recognize it as an enemy. When someone is brought to the ETU (Emergency Treatment Unit) after an accident, and there is no time to test the blood type, doctors often give O- blood.

AB positive (AB+) blood type is called the "Universal Recipient." This means that a person with AB+ blood type can receive blood from any blood type. Because they have all three antigens in their blood, A, B, and Rh, they accept any blood type from outside as "their own."

How does blood type matter during pregnancy?

It is extremely important for a pregnant mother to know her blood type, especially the Rh factor.

For example, if the mother's blood type is Rh negative (-) , but the father's blood type is Rh positive (+), the baby's blood type in the womb is likely to be Rh positive (+). In such a case, if the mother's and the baby's blood mix in some way (especially during childbirth), the mother's body recognizes the baby's Rh positive blood cells as "enemy". It then starts making antibodies against them.

This may not have a big impact on the first pregnancy. However, if an Rh-positive baby is conceived for the second time, the antibodies that the mother's body previously made can cross the placenta and begin to destroy the baby's red blood cells. This is very dangerous for the baby.

How do I know my blood type?

There are several ways to find out your blood type.

• Ask your doctor: If you've had a blood test before for any reason, your medical records may have your blood type recorded.
• Donate blood: This is the best and most valuable way. When you donate blood, the National Blood Transfusion Service tests your blood type for free and gives you a card. This will help you know your blood type and save someone's life.
• Get a lab test: You can find out your blood type by giving a blood sample at any hospital or private laboratory.

Normally, a person's blood type does not change throughout life. However, in very rare cases, such as a bone marrow transplant, or in certain medical conditions such as leukemia, blood type can change.

Blood Type, Blood Donation, Blood Group Sinhala, Rh factor, O negative, Universal Donor, Pregnancy, Blood Matching