A nurse is caring for a newborn immediately after birth. Which of the following actions by the nurse reduces evaporative heat loss by the newborn?
Maintaining ambient room temperature at 24° C (75° F).
Drying the newborn's skin thoroughly.
Preventing air drafts.
Placing the newborn on a warm surface.
The Correct Answer is B
A. Maintaining ambient room temperature at 24° C (75° F) can help prevent heat loss by keeping the environment warm, but it does not specifically address evaporative heat loss. Evaporative heat loss occurs when moisture on the skin evaporates, which is not directly controlled by ambient temperature.
B. Drying the newborn's skin thoroughly reduces evaporative heat loss by removing moisture that can evaporate and cool the skin. This action is critical immediately after birth when the newborn is wet with amniotic fluid.
C. Preventing air drafts helps reduce convective heat loss, not evaporative heat loss. Convective heat loss occurs when air moves across the skin and carries heat away.
D. Placing the newborn on a warm surface helps reduce conductive heat loss by preventing heat transfer from the baby to a cooler surface. However, this does not address evaporative heat loss, which is specifically related to moisture evaporation from the skin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","D"]
Explanation
Choice A rationale:
The normal temperature range for a newborn measured axillary (armpit) is 97.7-99.3°F (36.5- 37.4°C). This is a crucial vital sign to monitor, as any significant deviation from this range could indicate an underlying issue requiring further evaluation.
Choice B rationale:
The newborn's heart rate varies with their activity level. While asleep, it is around 100 bpm, and when awake, it is 120-160 bpm. During crying or agitation, it can go up to 180 bpm.
Monitoring the heart rate is essential, as any abnormal values might indicate cardiac or other health problems.
Choice D rationale:
The normal respiratory rate for a newborn is 30-60 breaths per minute. Respiratory rate is a critical parameter to monitor as rapid or slow breathing could be a sign of respiratory distress or other respiratory conditions.
Choice C rationale:
Blood pressure is not routinely assessed in newborns, as it is challenging to obtain accurate readings due to their small size and physiology. Instead, other vital signs are relied upon for assessment.
Choice E rationale:
The head circumference is not included in the normal vital sign ranges. However, monitoring head circumference is crucial during infancy to track brain growth and development.
Correct Answer is B
Explanation
Choice A rationale:
Providing a heat source for the newborn is not the purpose of surfactant. Surfactant is a substance produced in the lungs to reduce surface tension and prevent alveolar collapse during expiration. It helps with the exchange of gases, but it does not generate heat.
Choice B rationale:
This is the correct answer. Surfactant plays a crucial role in assisting the alveoli to remain open by reducing surface tension. This, in turn, allows for proper gas exchange, especially of oxygen and carbon dioxide.
Choice C rationale:
Assisting the ductus arteriosus to remain open is not the purpose of surfactant. The ductus arteriosus is a fetal blood vessel that connects the pulmonary artery to the aorta, bypassing the lungs. After birth, it should close on its own, and surfactant does not influence this process.
Choice D rationale:
Providing energy to the newborn is not the purpose of surfactant. Energy for the newborn comes from nutrition, particularly breast milk or formula, and not from surfactant
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