If there is ever a situation where only one current determination of a patient's ABO group is available, what do you do?

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Multiple Choice

If there is ever a situation where only one current determination of a patient's ABO group is available, what do you do?

In emergencies when ABO status is not fully confirmed, the safest approach is to transfuse group O red blood cells (preferably O negative). These cells lack A and B antigens, so they are the universal donor for RBC antigens and minimize the risk of an ABO-incompatible reaction if the patient’s ABO status is not certain. Waiting for a repeat ABO typing can delay life-saving transfusion and worsen outcomes. Transferring ABO-specific units or AB cells carries a higher risk of a harmful reaction if the patient has antibodies against A or B or if the initial determination is incorrect. Using group-specific RBCs isn’t appropriate when ABO status isn’t definitively known, because compatibility can’t be guaranteed.

In emergencies when ABO status is not fully confirmed, the safest approach is to transfuse group O red blood cells (preferably O negative). These cells lack A and B antigens, so they are the universal donor for RBC antigens and minimize the risk of an ABO-incompatible reaction if the patient’s ABO status is not certain. Waiting for a repeat ABO typing can delay life-saving transfusion and worsen outcomes. Transferring ABO-specific units or AB cells carries a higher risk of a harmful reaction if the patient has antibodies against A or B or if the initial determination is incorrect. Using group-specific RBCs isn’t appropriate when ABO status isn’t definitively known, because compatibility can’t be guaranteed.

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