What is the site for vitamin K injection for a newborn?

Appeared in: NHM UP Staff Nurse-2023 Shift-2nd

Explanation

The vastus lateralis muscle, located in the anterolateral aspect of the upper thigh, is the recommended and safest site for intramuscular (IM) injections in newborns.
This muscle is the largest and most well-developed in a newborn, which ensures proper medication absorption and minimizes local irritation.
This site is free from major nerves (like the sciatic nerve) and large blood vessels, significantly reducing the risk of neurovascular injury.

Option B: The gluteal muscles are underdeveloped in newborns and infants. Injecting here carries a high risk of damaging the sciatic nerve, which can lead to permanent leg paralysis.
Option C: The deltoid muscle in the upper arm is very small and not sufficiently developed in a newborn to safely absorb an IM injection.
Option D: The abdomen is a primary site for subcutaneous (under the skin) injections, not intramuscular (into the muscle) injections.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Intramuscular (IM) Injection Sites in Newborns as background academic context rather than a clinical decision trigger.
Administering Vitamin K is a critical prophylactic measure to prevent Vitamin K Deficiency Bleeding (VKDB), a potentially life-threatening condition in newborns.
Correct site selection is a fundamental nursing skill that directly impacts patient safety, preventing complications like nerve damage, hematoma, or ineffective medication absorption.
What if? If a newborn is premature, the vastus lateralis is still the preferred site, but the nurse must use a shorter needle (e.g., 16 mm or 5/8 inch) and may need to bunch the muscle tissue to ensure the injection is intramuscular and does not hit the bone.

How to Approach the Question

This is a factual recall question about a standard nursing procedure.
First, identify the key elements: the patient population (newborn) and the procedure (intramuscular injection).
Recall the anatomical and physiological differences between newborns and adults, specifically regarding muscle development.
Evaluate each option based on safety and suitability for a newborn. The vastus lateralis (upper thigh) is the largest and safest muscle. The gluteal muscle poses a risk to the sciatic nerve. The deltoid (upper arm) is too small. The abdomen is for subcutaneous injections.
Select the option that represents the safest and most effective site for an IM injection in this specific age group.

Concept Tested & Keywords

Q_AGQg67GowgoKErFH3Zrp

E6 Nursing Fundamentals Potter Perry 12e Part 3 pp. 174-176, 175-177

E6 Pharmacology Nursing Lilley 11e Part 1 p. 138-140

Practise the full NHM UP Staff Nurse-2023 Shift-2nd

Attempt every question from this paper in a timed mock, then review the full solution for each one.