An unconscious patient is rushed into the emergency room and...

An unconscious patient is rushed into the emergency room and needs an immediate blood transfusion. Because there is no time to check her medical history or determine her blood type, which type of blood should she receive? (A) $\mathrm{AB}^{+}$ (B) $\mathrm{AB}^{-}$ (C) $O^{+}$ (D) $0^{-}$

An unconscious patient is rushed into the emergency room and needs an immediate blood transfusion. Because there is no time to check her medical history or determine her blood type, which type of blood should she receive?
(A) $\mathrm{AB}^{+}$
(B) $\mathrm{AB}^{-}$
(C) $O^{+}$
(D) $0^{-}$

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Key Concepts

Universal Donor

This concept refers to a blood type that can be safely transfused to patients of any other blood type. It is fundamental in emergency medicine when there is no time to determine the patient’s blood type. Understanding the universal donor concept is essential for making critical decisions that minimize the risk of adverse reactions during blood transfusions.

ABO Blood Group System

The ABO blood group system classifies blood into types based on the presence or absence of antigens on the surface of red blood cells. These antigens are key determinants in blood transfusion compatibility, ensuring that the recipient's immune system does not attack the donor blood, which is crucial for safe transfusion practices.

Rh Factor

The Rh factor is an additional protein found on the surface of red blood cells that further categorizes blood types as either positive or negative. This factor is important in transfusion medicine because even if the ABO groups are compatible, Rh incompatibility can lead to serious immune reactions. In emergency settings where there is no time for complete blood typing, choosing blood that minimizes Rh-related risks is vital.

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