When administering an IM injection to an infant, the nurse in charge should use which site?

Appeared in: JODHPUR AIIMS SNO-2018

Explanation

The vastus lateralis muscle is the recommended site for IM injections in infants up to 12 months of age.
This muscle is the largest and most developed in an infant's body, ensuring adequate medication absorption.
Crucially, the vastus lateralis site is free of major nerves and blood vessels, making it the safest option to prevent complications like nerve damage or accidental intravenous injection.
The maximum volume for an IM injection in this site for an infant is typically 0.5 mL to 1 mL.

Option A: The ventrogluteal muscle is not sufficiently developed in infants to be a reliable or safe primary site for IM injections.
Option C: The deltoid muscle in an infant is extremely small and underdeveloped, posing a high risk of injury to the underlying radial nerve and brachial artery.
Option D: The dorsogluteal site is contraindicated for infants and generally no longer recommended for any age group due to the high risk of causing permanent damage to the sciatic nerve.

Clinical Relevance

Nursing practice connection: Use the key finding related to Preferred intramuscular (IM) injection site in infants to guide bedside assessment, documentation, and the next nursing action.
Proper site selection is a critical nursing responsibility to ensure patient safety and prevent iatrogenic injuries, such as nerve damage, paralysis, or abscess formation.
Administering an injection into an inappropriate site can lead to poor medication absorption, resulting in sub-therapeutic effects.
What if? If the patient were a 5-year-old child receiving a routine vaccination, the deltoid muscle would be an appropriate site, as it is sufficiently developed by that age for small-volume injections.

How to Approach the Question

First, identify the key patient demographic in the question stem: 'infant'.
Recall the principles of growth and development related to muscle mass in different age groups.
Evaluate each option based on anatomical safety and muscle development for an infant.
Eliminate the dorsogluteal site first, as it is contraindicated due to sciatic nerve risk.
Compare the remaining sites (vastus lateralis, ventrogluteal, deltoid) based on which muscle is largest and safest in an infant.
Select vastus lateralis as it is universally recommended as the primary, safest, and most developed muscle site for this age group.

Concept Tested & Keywords

Concept Tested: Preferred intramuscular (IM) injection site in infants.
Stem keywords: IM injection, infant, site
Lead-in keywords: which site
Clinical cues: Patient age is 'infant', which is the critical factor for site selection.

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E6 Nursing Fundamentals Potter Perry 12e Part 3 p. 174-176

E6 Nursing Fundamentals Taylor p. 861-863

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