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
Proximodistal development refers to growth from the center of the body outward to the extremities. An infant grabbing with their whole hand (palmar grasp) before developing a
pincer grasp demonstrates this pattern, as they gain control of arm movements before fine motor skills in the fingers.
Choice B rationale
Cephalocaudal development refers to growth from head to toe, such as gaining control over head and neck muscles before the limbs. This does not directly explain the grasping
behavior described.
Choice C rationale
Distoproximal is not a recognized term in developmental science and does not describe a growth pattern.
Choice D rationale
Top-to-bottom is another way of describing cephalocaudal development but does not specifically address the described behavior in grasping development. .
Correct Answer is ["A","B","C","D"]
Explanation
Step 1 is to convert the child's weight from pounds to kilograms: 28 lb ÷ 2.2 lb/kg = 12.727 kg.
Step 2 is to calculate the dose: 10 mg/kg × 12.727 kg = 127.27 mg.
Step 3 is to determine how many mL is needed: 127.27 mg ÷ (120 mg/5 mL) = 5.3029 mL.
Step 4 is to round to the nearest tenth: 5.3 mL. Final answer: 5.3 mL