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
Step 1 is 33 lb × (1 kg ÷ 2.2 lb) = 15 kg.
Step 2 is 30 mg/kg/day × 15 kg = 450 mg/day.
Step 3 is 450 mg/day ÷ 2 = 225 mg per dose.
Step 4 is 225 mg ÷ (200 mg/5 mL) = 5.625 mL. The final calculated answer is 5.6 mL.
Correct Answer is C
Explanation
Choice A rationale
The absence of creases on the plantar surface is typical of a preterm infant, not a term infant. Term infants usually have some creases.
Choice B rationale
Abundant lanugo is more common in preterm infants, while term infants may have some but not extensive lanugo.
Choice C rationale
A flexed position at rest is expected in a term neonate, as it indicates good muscle tone and neuromuscular development.
Choice D rationale
The pinna of the ear remaining folded is more indicative of a preterm infant, as term infants typically have fully formed and firmer ear cartilage.