In an emergency when the patient is unable to state his blood group, it is safer to cross match with which bl… - ESIC Nursing Officer 2016 (shift-1)

ESIC Nursing Officer 2016 (shift-1)

Medical Surgical Nursing

Easy

Appeared in: ESIC Nursing Officer 2016 (shift-1)

Explanation

O-negative blood is considered the universal donor because its red blood cells (RBCs) have no A, B, or RhD antigens on their surface.
The absence of these antigens means it is unlikely to trigger an immune reaction in a recipient, regardless of the recipient's blood type.
In an emergency, when there is no time for blood typing and cross-matching, transfusing O-negative blood minimizes the risk of a life-threatening hemolytic transfusion reaction.

Option A: AB-negative blood contains both A and B antigens on its red blood cells. Transfusing this to a patient with type A, B, or O blood would cause a severe immune reaction.
Option C: AB-positive blood has A, B, and Rh antigens. It is the least safe option for an unknown recipient and would cause a reaction in any non-AB+ patient. It is the universal recipient, not a universal donor.
Option D: A-negative blood has A antigens on its red blood cells. It would trigger an immune reaction if given to a patient with type B or type O blood.

Visual 1: Diagram - A blood compatibility chart showing which blood types can donate to and receive from others. This visual would clearly illustrate why O-negative is the universal donor and AB-positive is the universal recipient.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Universal blood donor principle in emergency transfusion in acute care settings.
In a life-threatening hemorrhage, the nurse's priority is to initiate transfusion of uncrossmatched O-negative blood as per protocol to restore circulating volume and oxygen-carrying capacity.
Nurses must meticulously verify the blood product and patient identity, even in an emergency, and continuously monitor vital signs for any sign of a transfusion reaction (e.g., fever, chills, back pain, shortness of breath).
What if? If the patient is a male or a post-menopausal female and O-negative blood is in short supply, some protocols may allow for the use of O-positive blood, as the risk of Rh sensitization is less critical in these populations.

How to Approach the Question

First, identify the critical elements of the question: 'emergency' and 'unable to state blood group'. This indicates a need for the safest, most universally compatible option.
Recall the principles of the ABO and Rh blood group systems, specifically the concepts of antigens and antibodies.
Remember the definition of a 'universal donor': a blood type that lacks antigens on the red blood cells, preventing an immune reaction in the recipient.
Evaluate each option based on its antigens: AB has A and B antigens, A has A antigens, and O has no antigens.
The negative (-) Rh factor indicates the absence of the Rh antigen, making it even safer.
Conclude that O-negative (O-ve) is the only option with no A, B, or Rh antigens, making it the universal donor and the correct choice.

Concept Tested & Keywords

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