In which of the following areas should a nurse administer an injection for a newborn infant?
Deltoid muscle.
Vastus lateralis.
Gluteus maximus.
Rectus femoris.
The Correct Answer is B
Choice A rationale
The deltoid muscle is not recommended for newborns due to its small size and underdevelopment.
Choice B rationale
The vastus lateralis muscle is well-developed in newborns and has a large enough surface area to safely accommodate injections.
Choice C rationale
The gluteus maximus muscle is not suitable for newborn injections due to the risk of nerve damage.
Choice D rationale
The rectus femoris muscle is less commonly used due to the potential for more pain and discomfort.
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Correct Answer is A
Explanation
Choice A rationale
Storing a firearm in a top drawer is unsafe, even if it is out of the child’s immediate reach. Firearms should be securely locked in a location inaccessible to children.
Choice B rationale
Locking cleaning products under the sink is a safe practice to prevent accidental poisoning, demonstrating correct safety precautions.
Choice C rationale
Placing safety covers on electrical outlets is a safe practice to prevent electrical shocks, indicating proper home safety measures.
Choice D rationale
Installing safety gates at the top and bottom of stairs is a recommended safety measure to prevent falls, showcasing awareness of proper childproofing.
Correct Answer is B
Explanation
Choice A rationale
A pincer grasp, using the thumb and index finger to pick up small objects, typically develops around 9 to 12 months of age, not at 4 months.
Choice B rationale
The posterior fontanel typically closes by the age of 2 to 3 months, so a 4-month-old infant would be expected to have a closed posterior fontanel. This finding is consistent with normal development.
Choice C rationale
Lateral incisors, the teeth on either side of the front teeth, typically erupt around 9 to 13 months of age, not at 4 months.
Choice D rationale
Sitting steadily without support generally occurs closer to 6 to 8 months of age, so it would not be expected in a 4-month-old infant.