Injection Vit. K Should be administered in neonates at which muscle?

RUHS, Jaipur, PB B.Sc Nursing Entrance-2024

Child Health Nursing (Pediatrics)

Easy

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2024

Explanation

The vastus lateralis muscle is the recommended site for intramuscular (IM) injections in neonates.
It is the largest and most developed muscle in a newborn, ensuring proper medication absorption.
This site is located on the anterolateral aspect of the thigh and is free from major nerves and blood vessels, making it the safest option to prevent injury.
The muscle can safely accommodate the standard volume of a Vitamin K injection (0.5 mL).

Option A: The deltoid muscle is underdeveloped in neonates and small infants. Injecting here poses a significant risk of injury to the radial and axillary nerves.
Option B: The triceps muscle is not a recommended site for IM injections in any age group, especially neonates, due to its small size and proximity to major nerves and blood vessels.
Option D: The biceps muscle is not a standard or safe site for IM injections. It lacks sufficient mass and is close to major nerves and arteries, creating a high risk of neurovascular injury.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Intramuscular Injection Sites in Neonates as background academic context rather than a clinical decision trigger.
Correct site selection is a fundamental nursing skill for patient safety, especially in vulnerable populations like neonates. Using the wrong site can lead to nerve damage, pain, and ineffective medication absorption.
Administration of Vitamin K is a critical prophylactic measure to prevent Vitamin K Deficiency Bleeding (VKDB), a potentially life-threatening condition in newborns.
What if? If the neonate's thighs were inaccessible (e.g., due to a bilateral hip spica cast), the rectus femoris muscle (also in the thigh) could be considered as an alternative, though it is less preferred than the vastus lateralis because it is closer to the sciatic nerve.

How to Approach the Question

First, identify the key components of the question: 'Injection Vit. K' and 'neonates'.
Recall the principles of intramuscular (IM) injections and how anatomical considerations change with age.
Focus on the unique anatomy of a newborn. Remember that their limb muscles, particularly in the arms and buttocks, are not well developed.
Evaluate each option based on neonatal muscle mass and safety. The thigh muscles are the most developed at birth.
Eliminate the arm muscles (Deltoid, Triceps, Biceps) as they are too small and pose a risk of nerve injury.
Select Vastus lateralis as it is the largest, safest, and universally recommended IM injection site for newborns.

Concept Tested & Keywords

Concept Tested: Intramuscular Injection Sites in Neonates
Stem keywords: Injection, Vit. K, neonates, muscle
Lead-in keywords: which muscle
Clinical cues: The patient population is 'neonates', which is a critical factor in selecting the injection site.

QNmJLj3x34PMXVU2LRJgU8

E6 Nursing Fundamentals Potter Perry 12e Part 3 p. 175-177

E6 Anatomy Applied Ashalatha 4e p. 345-347

E6 Physiology Ganong 27e Vol 2 Part 3 p. 106-108