For a 10-month-old child, an IM injection can be given in the?

NHM UP Staff Nurse - 2019

Child Health Nursing (Pediatrics)

Medium

Appeared in: NHM UP Staff Nurse - 2019

Explanation

The anterolateral thigh contains the vastus lateralis muscle, which is the largest and most developed muscle in infants under 12 months of age.
This site is the safest choice because it is not close to any major nerves (like the sciatic nerve) or large blood vessels, minimizing the risk of injection-related injuries.
The vastus lateralis can safely accommodate the typical volume for infant immunizations, which is generally 0.5 mL to 1 mL.

Option A: The deltoid muscle is small and underdeveloped in infants, providing insufficient mass for medication absorption and increasing the risk of injury to the radial and axillary nerves.
Option B: The dorsogluteal site (buttocks) is strictly contraindicated in infants and young children due to the high risk of causing permanent damage to the sciatic nerve.
Option D: The abdomen is a site for subcutaneous (Sub-Q) injections, not intramuscular (IM) injections. Injecting an IM medication into the subcutaneous fat of the abdomen would lead to improper absorption and reduced efficacy.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Intramuscular (IM) injection sites for infants as background academic context rather than a clinical decision trigger.
Correct site selection for IM injections is a critical nursing responsibility to ensure patient safety, prevent nerve damage or paralysis, and guarantee effective medication absorption and immunization.
Improper site selection can lead to serious complications, including abscess formation, hematoma, cellulitis, and ineffective vaccine response, which is a major patient safety issue.
What if? - If the child were 4 years old and receiving a small volume vaccine (e.g., 0.5 mL), the deltoid muscle would also be an appropriate site, as it is typically sufficiently developed by that age. However, the vastus lateralis remains a suitable option.

How to Approach the Question

First, identify the key clinical parameters in the question: the patient's age (10-month-old infant) and the procedure (IM injection).
Recall the principles of pediatric growth and development. At this age, an infant's leg muscles (used for kicking) are more developed than their arm or gluteal muscles.
Systematically evaluate each option based on anatomical safety and muscle development for an infant.
Eliminate the deltoid muscle because it is too small and underdeveloped in an infant.
Eliminate the buttocks (dorsogluteal site) because of the universally taught contraindication due to high risk of sciatic nerve injury.
Differentiate between injection routes, eliminating the abdomen as it is a site for subcutaneous, not intramuscular, injections.

Concept Tested & Keywords

Concept Tested: Intramuscular (IM) injection sites for infants.
Stem keywords: 10-month-old child, IM injection
Lead-in keywords: can be given in the
Clinical cues: Patient age: 10-month-old child (infant) - this is the key factor determining the appropriate muscle site.

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