Therefore, the blood group RH system is divided into 8 blood groups as follows:

1. ARH positive blood type (A +)
2. ARH negative (A-)
3. BRH positive (B +)
4. Blood type BRH negative (B-)
5. ORH positive blood type (O +)
6. The ORH negative (O-) blood group is a safe blood group for all blood types. Because it is compatible with all blood types It is often used in an emergency when the doctor does not know the patient’s blood type.
7. ABRH positive (AB +)
8. Blood type ABRH negative (AB-)

Blood type examination

Testing is the most accurate way to know your blood type. The blood type test is usually performed in the event that the patient has to undergo a blood transfusion or after a blood donation. By taking a sample of donated blood to be examined by a blood type screening method. However, if the general public wants to know his blood type, he or she can be tested right away.

Procedures for the blood type test 

The blood type test is the same as a general blood test. However, it differs in that the examined does not need to refrain from water and food before the examination. Can be examined at all

The examination process will start from The nurse strapped the upper arm with a tourniquet or elastic to see the vein more clearly and make it easier to use a needle to puncture the vein.

Then, a nurse or staff specializing in blood draw will take a cotton swab with alcohol to wipe the area where the blood will be drawn. A sterile needle is punctured into the area to collect blood samples. However, if the puncture does not get the blood that you want. You may need to replace the puncture site and replace the needle.

While taking blood samples The nurse will release the strap on the upper arm. When the desired amount of blood was obtained, the nurse pledged the needle. And cover the area of ​​blood draw with cotton or plaster to cover the wound

The nurse will then instruct the patient to sit and wait for the next test.

The RH system blood type test is performed using an antibody-D-large reagent. Because most RH-positive erythrocytes, when interacting with this reagent, the red blood cell agglomeration or coagulation reaction is evident immediately. However, if the grouping does not occur, the person is considered to have negative RH blood type. (No antigens – big good)

Side effects from blood type tests 

Typically, blood type testing is a relatively harmless method. However, there may be some side effects. Such as bruising in the venipuncture area, dizziness or fainting, inflamed vascular swelling after the venipuncture in some cases. Or the bleeding may not stop in people with blood clotting disorders or who are taking aspirin. Drug dissolves blood clots anticoagulant drugs. So for safety If the examined has coagulation problems or a history of easy bruising or swollen veins. Should always inform your doctor or nurse first In order to be more careful in blood drawing.