A nurse is caring for a preterm newborn who is in an incubator to maintain a neutral thermal environment.
The father of the newborn asks the nurse why this is necessary. Which of the following responses should the nurse make?
Preterm newborns lack the ability to regulate their own temperatures.
The heat in the incubator rapidly dries the sweat of preterm newborns.
Preterm newborns have a smaller body surface area than normal newborns.
The added brown fat layer in a preterm newborn reduces his ability to generate heat.
The Correct Answer is A
Choice A rationale
Preterm newborns have underdeveloped mechanisms for thermoregulation, making it difficult for them to maintain stable body temperatures without external assistance.
Choice B rationale
Preterm newborns do not sweat significantly because their sweat glands are not fully developed; thus, this rationale is incorrect.
Choice C rationale
Preterm newborns actually have a larger body surface area relative to their weight, contributing to their difficulty in maintaining body temperature.
Choice D rationale
Preterm newborns have insufficient brown fat, not an excess, which impairs their ability to generate heat effectively.
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Correct Answer is C
Explanation
Choice A rationale
An APGAR score of 5 indicates significant distress and poor adjustment to extrauterine life, which is not consistent with the provided description of the infant's condition.
Choice B rationale
An APGAR score of 6 suggests moderate difficulty with extrauterine adaptation, which is still not entirely consistent with the overall assessment of the infant.
Choice C rationale
An APGAR score of 7 aligns with the described observations of the newborn: pink trunk and head, bluish extremities, active movement, heart rate of 130/min, and a response to
suctioning, which suggest the infant is in reasonably good condition with some minor issues that need monitoring.
Choice D rationale
An APGAR score of 8 would indicate that the newborn is in very good condition with only slight adjustments needed, which does not fully match the infant's description with the noted
issues like a weak cry and bluish extremities.
Correct Answer is ["A","B","C","D"]
Explanation
Step 1 is to convert the child's weight from pounds to kilograms: 28 lb ÷ 2.2 lb/kg = 12.727 kg.
Step 2 is to calculate the dose: 10 mg/kg × 12.727 kg = 127.27 mg.
Step 3 is to determine how many mL is needed: 127.27 mg ÷ (120 mg/5 mL) = 5.3029 mL.
Step 4 is to round to the nearest tenth: 5.3 mL. Final answer: 5.3 mL