A child is born to a woman who has tested HBsAg Positive. Should this infant receive the first dose of hepati… - HPSSC - 2015

HPSSC - 2015

Child Health Nursing (Pediatrics)

Easy

Appeared in: HPSSC - 2015

Explanation

For an infant born to an HBsAg-positive mother, the first dose of the Hepatitis B vaccine must be given within 12 hours of birth to prevent perinatal transmission.
This is a critical post-exposure prophylaxis measure.
In addition to the vaccine, the infant should also receive Hepatitis B Immune Globulin (HBIG) within 12 hours, administered at a separate site.
This dual approach of active (vaccine) and passive (HBIG) immunization is over 95% effective in preventing the infant from developing chronic Hepatitis B infection.

Option A: This timeframe (6-18 months) is the window for the third (final) dose of the Hepatitis B vaccine series, not the urgent first dose required for post-exposure prophylaxis.
Option C: This timeframe (first two months) is the window for the second dose of the Hepatitis B vaccine series, not the first.
Option D: This timeframe does not align with the standard schedule for any of the initial three doses of the Hepatitis B vaccine for a high-risk infant.

Clinical Relevance

Nursing practice connection: Use the key finding related to Hepatitis B post-exposure prophylaxis in newborns to guide bedside assessment, documentation, and the next nursing action.
A nurse's primary responsibility is to ensure timely administration of both the Hepatitis B vaccine and HBIG within the 12-hour window. This is a critical patient safety intervention to prevent a lifelong chronic disease.
Nursing actions include verifying the mother's HBsAg status, preparing and administering two separate injections in different anterolateral thigh muscles, meticulous documentation, and educating the parents on the importance of completing the vaccine series and follow-up testing.
What if the mother's HBsAg status is unknown at the time of delivery? The infant should receive the first dose of the Hepatitis B vaccine within 12 hours of birth. The mother's blood should be tested immediately. If she is found to be HBsAg-positive, the infant must receive HBIG as soon as possible (within 7 days).

How to Approach the Question

First, identify the key clinical information in the question: the mother is 'HBsAg Positive'. This immediately signals a high-risk situation for the newborn.
Recognize that this scenario requires prevention of perinatal (mother-to-child) transmission.
Recall the standard protocol for post-exposure prophylaxis in newborns exposed to Hepatitis B. This involves both active and passive immunization.
Focus on the timing of the first intervention. The protocol emphasizes immediate action to prevent the virus from establishing a chronic infection.
Evaluate the options based on urgency. 'Within 12 hours of birth' is the most immediate and specific timeframe, consistent with emergency post-exposure guidelines.
Eliminate other options by identifying them as timings for later doses in the vaccination series.

Concept Tested & Keywords

Concept Tested: Hepatitis B post-exposure prophylaxis in newborns
Stem keywords: HBsAg Positive, infant, hepatitis B vaccine, first dose
Lead-in keywords: Should this infant receive
Clinical cues: Maternal HBsAg positive status indicates a high-risk exposure for the infant at birth.

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