The site of intramuscular injection in infants is?

HPSSC Staff Nurse - 2021

Child Health Nursing (Pediatrics)

Easy

Appeared in: HPSSC Staff Nurse - 2021

Explanation

The vastus lateralis muscle is the preferred site for intramuscular (IM) injections in infants (birth to 12 months).
This muscle is the largest and most developed in an infant's body, which allows for better absorption of medication.
The anterolateral aspect of the thigh is specifically chosen because it is located away from major nerves (like the sciatic nerve) and blood vessels, significantly reducing the risk of injury.
The recommended volume for an IM injection in an infant's vastus lateralis is small, typically not exceeding 0.5 mL to 1 mL.

Option B: The posterior thigh is a dangerous and incorrect site for an IM injection in any age group, especially infants, due to the close proximity of the sciatic nerve.
Option C: This option is too vague. While the vastus lateralis is on the lateral side of the thigh, the specific, safe, and recommended landmark is the anterolateral aspect (the outer-front portion).
Option D: This option is incorrect because only one of the listed sites (anterolateral portion) is the correct and safe location for an IM injection in an infant.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomical site for intramuscular injections in infants as background academic context rather than a clinical decision trigger.
Using the correct injection site is a critical patient safety measure to prevent nerve damage, pain, and improper medication absorption.
Nurses must always consider the patient's age and muscle development when selecting an IM injection site. The vastus lateralis is the standard of care for infants.
What if? If the patient were a 5-year-old child receiving a routine vaccination, the deltoid muscle in the upper arm would be a preferred site, provided the muscle mass is adequate. The ventrogluteal site is also an excellent alternative.

How to Approach the Question

First, identify the key elements of the question: 'intramuscular injection' and 'infants'.
Recall the principles of medication administration for pediatric patients, focusing on anatomical differences based on age.
Remember that muscle development in infants is limited, and certain sites are safer than others.
Evaluate each option. The vastus lateralis is the correct muscle. Now, consider the specific location on that muscle.
Eliminate the 'posterior' option due to the risk of sciatic nerve injury.
Recognize that 'lateral' is less precise than 'anterolateral,' which is the specific landmark taught for this procedure.

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