NORCET-7 Mains-2024: Route of administration of pentavalent vaccine?

NORCET-7 Mains-2024

Pharmacology

Easy

Appeared in: NORCET-7 Mains-2024

Explanation

The pentavalent vaccine is a combination vaccine that includes components for Diphtheria, Tetanus, Pertussis, Hepatitis B, and Haemophilus influenzae type b.
According to immunization guidelines, this vaccine is administered via the Intramuscular (IM) route.
The recommended site for infants is the anterolateral aspect of the mid-thigh (vastus lateralis muscle), which allows for good absorption and minimizes risk of injury.
The IM route is chosen for adjuvanted vaccines like pentavalent to ensure efficacy and reduce the likelihood of local reactions such as sterile abscesses.

Option A: The Intravenous (IV) route is incorrect. Vaccines are not administered directly into the bloodstream as this can cause systemic reactions and is not the standard for inducing a proper immune response.
Option B: The Subcutaneous (SC) route is incorrect for the pentavalent vaccine. Administering this adjuvanted vaccine into the subcutaneous tissue can lead to intense local inflammation, sterile abscess formation, and reduced immunogenicity.
Option D: The Intradermal (ID) route is incorrect for the pentavalent vaccine. This route involves injecting into the uppermost layer of the skin and is reserved for specific vaccines.

Visual 1: Diagram - A diagram illustrating the different angles and tissue layers for Intradermal (10-15°), Subcutaneous (45°), and Intramuscular (90°) injections. This helps visualize why different routes target different tissues.
Visual 2: Illustration - An image showing the anatomical landmarking for an IM injection in an infant's anterolateral thigh (vastus lateralis muscle).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Route of administration for pentavalent vaccine as background academic context rather than a clinical decision trigger.
Using the correct administration route is a critical nursing responsibility for patient safety and vaccine efficacy. An incorrect route can lead to vaccine failure or severe adverse reactions.
For the pentavalent vaccine, the IM route into the vastus lateralis is the standard of care in infants, as this muscle is well-developed and can safely accommodate the vaccine volume.
What if? If a pentavalent vaccine were accidentally administered subcutaneously instead of intramuscularly, the nurse should document the error, monitor the site closely for signs of a sterile abscess or severe local reaction, and inform the physician. The patient's immunization status for that dose might be compromised.

How to Approach the Question

First, identify the core of the question, which is asking for the specific administration route of the 'pentavalent vaccine'.
This is a factual recall question based on the national immunization schedule.
Recall the standard administration routes for common vaccines provided under the Universal Immunization Programme (UIP).
Remember that combination vaccines containing DPT, Hep B, and Hib are given intramuscularly.
Compare this knowledge with the given options: IV, SC, IM, and ID.
Select 'IM' as it is the correct route for the pentavalent vaccine.

Concept Tested & Keywords

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