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A person met with an accident and there is no time to, check his blood group, which of the following blood should be given to him ?


1. O, Rh+
2. O, Rh-
3. AB, Rh-
4. AB, Rh+

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Best answer
Correct Answer - Option 2 : O, Rh-

The correct answer is O, Rh-.

  • In accident situations, there is seldom enough time to determine the blood type of a patient with a life-threatening hemorrhage, In such a situation, the most certain way to save the patient's life is to use emergency blood, or blood type O negative, which is suitable for everyone.
  • Blood type O negative donors, in particular, are needed to secure the continued supply of so-called “emergency blood”.

  • A person who is AB positive has every kind of protein in his blood. There is nothing in any blood type that would be foreign to his body, so rejection is not a problem.
  • A type O negative person has none of the proteins that can cause rejection in his blood, so his blood can be accepted by anyone.
  • Rh blood type checks for the Rh antigen (also called the Rh factor) on red blood cells. If your red blood cells
    • Have the Rh antigen, your blood is Rh-positive.
    • Do not have the Rh antigen, your blood is Rh-negative.
  • Type O-negative blood does not have any antigens. It is called the "universal donor" type because it is compatible with any blood type.
  • Type AB-positive blood is called the "universal recipient" type because a person who has it can receive the blood of any type.

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