A nurse is assessing a 4-month-old infant on a pediatric unit.
Which of the following findings should the nurse expect?
Uses thumb and index fingers in a pincer grasp.
Closed posterior fontanel.
Lateral incisors.
Sitting steadily without support.
The Correct Answer is B
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.
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Correct Answer is B
Explanation
Choice A rationale
Vitamin K has no role in stabilizing blood glucose levels; hypoglycemia in newborns is managed differently.
Choice B rationale
Vitamin K is essential for blood clotting, and newborns typically have low stores at birth, necessitating supplementation to prevent bleeding disorders.
Choice C rationale
There is no established link between maternal fever and the need for vitamin K; prophylaxis is standard for all newborns regardless of maternal health.
Choice D rationale
Newborns do not have sufficient prothrombin or other clotting factors, which is why vitamin K administration is critical.
Correct Answer is ["A","B","C","E"]
Explanation
Choice A rationale
Serving food in small, halved, or quartered pieces can help prevent choking, which is a significant concern for infants and young children who are still developing their chewing and swallowing skills.
Choice B rationale
Ensuring the mattress fits snugly against the sides of the crib prevents the infant from getting trapped between the mattress and the crib sides, reducing the risk of suffocation or injury.
Choice C rationale
Child-proof locks on cabinet doors prevent infants from accessing hazardous substances or dangerous objects that could cause harm. This is a crucial aspect of home safety for young children.
Choice D rationale
Setting the water heater at 65°C (149°F) is not recommended because it is too hot and can cause burns. The water heater should be set at a maximum of 48°C (118°F) to prevent scalding injuries.
Choice E rationale
Never leaving a child unattended during bath time is essential to prevent drowning, which can occur quickly and silently. Close supervision is necessary to ensure the child’s safety in the water. .