RH₀ (D) Immune globin is advised if-

RUHS, Jaipur, PB B.Sc Nursing Entrance-2024

Obstetrics and Midwifery Nursing

Easy

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2024

Explanation

Rho(D) immune globulin is a medication used to prevent a specific immune reaction called Rh alloimmunization.
This reaction only occurs when an Rh-negative mother is exposed to Rh-positive blood, which can happen during the birth of an Rh-positive baby.
The mother's immune system identifies the baby's Rh-positive red blood cells as foreign and creates antibodies against them.
These maternal antibodies can cross the placenta in future pregnancies and attack the red blood cells of a subsequent Rh-positive fetus, causing a serious condition called Hemolytic Disease of the Fetus and Newborn (HDFN).
Administering Rho(D) immune globulin provides passive immunity, destroying the fetal Rh-positive cells in the mother's system before her own immune system can become sensitized and produce long-term antibodies.

Option B: If the mother is Rh-positive, her body already has the Rh antigen. Her immune system will not produce antibodies against an Rh-negative baby, who lacks the antigen.
Option C: If both the mother and the baby are Rh-negative, there is no Rh antigen present to trigger an immune response. Their blood is compatible in this regard.
Option D: If both the mother and the baby are Rh-positive, their blood is compatible regarding the Rh factor. The mother's immune system will not see the baby's blood as foreign.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Rh incompatibility and the indication for Rho(D) immune globulin administration as background academic context rather than a clinical decision trigger.
Administering Rho(D) immune globulin is a critical nursing intervention to prevent Hemolytic Disease of the Fetus and Newborn (HDFN), a potentially fatal condition for the fetus in subsequent pregnancies.
Nurses are responsible for verifying the mother's and baby's blood type and Rh status, ensuring the medication is given within the correct timeframe (within 72 hours postpartum), and educating the mother about its importance.
What if? If an Rh-negative mother is already sensitized (has already produced anti-D antibodies) from a previous pregnancy, miscarriage, or blood transfusion, giving Rho(D) immune globulin is ineffective. The pregnancy must then be monitored closely for signs of HDFN in the fetus.

How to Approach the Question

First, identify the core concept of the question, which is the reason for administering Rho(D) immune globulin.
Recall the basic principle of Rh incompatibility: an immune reaction occurs when a person lacking an antigen is exposed to it.
For sensitization to occur, the mother must be Rh-negative (lacking the D antigen). This immediately eliminates options where the mother is Rh-positive.
Next, the mother must be exposed to the Rh-positive antigen. This can only happen if the baby is Rh-positive.
Evaluate the remaining options based on this logic. The only scenario that meets both criteria (Rh-negative mother and Rh-positive baby) is the correct answer.

Concept Tested & Keywords

Concept Tested: Rh incompatibility and the indication for Rho(D) immune globulin administration.
Stem keywords: RH0 (D) Immune globin, advised
Lead-in keywords: BEST, MOST RELEVANT CLUE
Negative lead-in flag: false

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