A nurse places a newborn under a radiant heat warmer after birth. The purpose of this action is to prevent which of the following in the newborn?
Shivering.
Cold stress.
Brown fat production.
Basal metabolic rate reduction.
The Correct Answer is B
Choice A rationale
Shivering is not a primary concern for newborns as they have limited ability to shiver. Instead, they rely on non-shivering thermogenesis to maintain body temperature.
Choice B rationale
Cold stress is a significant concern for newborns as it can lead to hypothermia, increased oxygen consumption, and metabolic acidosis. Placing a newborn under a radiant heat warmer helps maintain their body temperature and prevent cold stress.
Choice C rationale
Brown fat production is a natural process in newborns that helps generate heat. However, the primary purpose of using a radiant heat warmer is to prevent cold stress, not to stimulate brown fat production.
Choice D rationale
Basal metabolic rate reduction is not the primary concern. The focus is on preventing cold stress and maintaining the newborn’s body temperature.
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Correct Answer is D
Explanation
Choice A rationale
Newborns are not born with fully developed immune responses. Their immune system is immature and continues to develop after birth. They rely on maternal antibodies for initial protection.
Choice B rationale
Newborns do not have a mature gut microbiome immediately after birth. The gut microbiome develops over time and is influenced by factors such as breastfeeding and exposure to the environment.
Choice C rationale
Newborns do not rely solely on their innate immune system. They receive passive immunity from maternal antibodies transferred through the placenta and colostrum, which provides initial protection against infections.
Choice D rationale
Newborns receive passive immunity through the placenta and colostrum, but their own immune system is not fully functional until several months of age. This passive immunity helps protect them from infections during the early months of life.
Correct Answer is A
Explanation
Choice A rationale
Drying the newborn’s skin thoroughly immediately after birth helps reduce heat loss by evaporation, which is a significant concern as wet skin can cause rapid heat loss.
Choice B rationale
Maintaining ambient room temperature at 24°C (75°F) helps prevent heat loss by convection but does not directly address evaporation.
Choice C rationale
Placing the newborn on a warm surface helps prevent heat loss by conduction but does not address evaporation.
Choice D rationale
Preventing air drafts helps reduce heat loss by convection but does not address evaporation.