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?
Basal metabolic rate reduction.
Brown fat production.
Shivering.
Cold stress.
The Correct Answer is D
Choice A reason:
Basal metabolic rate reduction. This is incorrect because a newborn under a radiant heat warmer will have an increased basal metabolic rate, not a reduced one. The basal metabolic rate is the amount of energy the body uses at rest, and it is influenced by temperature. A warmer environment will stimulate the newborn's metabolism and increase the energy expenditure. • Choice B reason:
Brown fat production. This is incorrect because a newborn under a radiant heat warmer will have less need for brown fat production, not more. Brown fat is a type of fat tissue that generates heat by burning calories. It is found in newborns and helps them maintain their body temperature in cold environments. A warmer environment will reduce the need for brown fat activation. • Choice C reason:
Shivering. This is incorrect because a newborn under a radiant heat warmer will not shiver, but shivering is not the main mechanism of heat production in newborns. Shivering is an involuntary contraction of muscles that generates heat by increasing metabolism. Newborns have limited ability to shiver because of their immature nervous system and low muscle mass. They rely more on brown fat and increased metabolic rate to produce heat. • Choice D reason:
Cold stress. This is correct because a newborn under a radiant heat warmer will prevent cold stress, which is a condition where the newborn's body temperature drops below normal and causes adverse effects. Cold stress can impair oxygen delivery, increase acidosis, decrease blood glucose, and increase the risk of infection and bleeding. A radiant heat warmer provides a neutral thermal environment for the newborn and prevents heat loss by radiation.
: 1 : 2 : 3 : 4.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason:
Choice A is the correct answer because the number of wet diapers a newborn has per day is a reliable indicator of effective breastfeeding. When a baby is breastfeeding well and getting enough milk, they will have an adequate number of wet diapers, typically at least six to eight per day. The frequent wet diapers indicate that the baby is adequately hydrated, and their body is eliminating waste products as expected.
Choice B reason:
Choice B, having at least one breast milk stool every 24 hours, is not the most reliable indicator of effective breastfeeding, although it is an important consideration. The frequency of bowel movements can vary among breastfed infants, and some babies may have several bowel movements a day, while others may have fewer, even skipping a day. The number of wet diapers is a more consistent measure of sufficient milk intake.
Choice C reason:
Choice C, sleeping for 6 hours at a time between feedings, is not an accurate indicator of effective breastfeeding in a 4-day-old newborn. Newborns typically feed frequently, at least 8-12 times in 24 hours, and they may not sleep for extended periods between feedings at this age. Frequent feeding is essential for establishing a good milk supply and ensuring the baby receives enough nutrients.
Choice D reason:
Choice D, gaining 1 to 2 ounces per week, is also not the most reliable indicator of effective breastfeeding in the early days after birth. Weight gain can vary significantly in newborns, and a 4-day-old baby might not show the expected 1 to 2 ounces per week gain yet. Moreover, weight gain can be affected by factors other than breastfeeding, such as birth weight, initial fluid loss, and individual growth patterns.
Correct Answer is B
Explanation
Choice A reason:
Choice A is incorrect because an Apgar score of 7 would not be appropriate for the described condition. An Apgar score of 7-10 is considered normal for a baby at 1 minute after birth. This baby shows positive signs such as a heart rate of 138 bpm, loud vigorous crying, spontaneous movement and flexion of the extremities, and pink skin color except for a bluish color of the hands and feet, which indicate good overall health.
Choice B reason:
Choice B is the correct answer. An Apgar score of 8 is appropriate for the described condition.
The Apgar score evaluates the baby's condition at 1 minute after birth based on five criteria: heart rate, respiratory effort, muscle tone, reflex irritability, and color. Each criterion is scored from 0 to 2, and the scores are summed up to determine the overall Apgar score. In this case, the baby exhibits positive signs in most of the criteria, resulting in an Apgar score of 8.
Choice C reason:
Choice C is incorrect because an Apgar score of 9 would be too high for the baby's condition. While the baby is exhibiting positive signs, there are still some concerns such as the bluish color of the hands and feet, which may indicate some minor circulation issues.
Choice D reason:
Choice D is also incorrect because an Apgar score of 10 is the highest possible score, and it is typically given to babies who exhibit absolutely no signs of distress or health issues at 1 minute after birth. While this baby shows mostly positive signs, the bluish color of the hands and feet suggests that there might be some minor health concerns, justifying an Apgar score of 8.
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