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Question
An unconscious patient is rushed into the emergency room and needs a fast blood transfusion. Because there is no time to check her medical history or determine her blood type, which type of blood should you as her doctor, give her?
Options
A−
AB
O+
O−
MCQ
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Solution
O−
Explanation:
- O blood type has no A or B antigens on the red blood cells, so it won’t trigger an immune reaction from recipients with type A, B, AB, or O blood.
- Negative (Rh−) ensures that Rh incompatibility does not cause a hemolytic reaction.
Hence, O− blood is called the universal donor for red blood cell transfusions and is used in emergencies.
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