The purpose of surfactant is to?
Provide a heat source for the newborn.
Assist the alveoli to remain open.
Assist the ductus arteriosus to remain open.
Provide energy to the newborn.
The Correct Answer is B
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
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Wearing a supportive bra can actually help to manage engorgement, so it's not recommended to avoid wearing one during the day.
Choice B rationale:
Cold compresses are typically applied after feeding to reduce swelling, not before. Applying them before might hinder the milk let-down reflex.
Choice C rationale:
Frequent feeding can help to alleviate engorgement by ensuring that the breasts are being emptied regularly.
Choice D rationale:
Stopping breastfeeding until finishing antibiotics is not advisable, as it can lead to decreased milk supply and potential issues with engorgement. Antibiotics prescribed by a healthcare provider are usually safe to take while breastfeeding, and interrupting breastfeeding can exacerbate the engorgement problem. This choice is not appropriate for managing breast engorgement and is therefore incorrect.
Correct Answer is C
Explanation
A. A blood glucose fingerstick of 40 mg/dL for an infant who is 1-hr old: A blood glucose level of 40 mg/dL is borderline low but expected in the immediate postnatal period, especially if the infant is asymptomatic. Feeding the infant is the first step to address this, and monitoring is usually sufficient unless symptoms of hypoglycemia develop.
B. A hematocrit of 60% in an infant who is 8-hr old: This value is at the upper end of normal for a newborn and may suggest mild polycythemia. However, it does not require urgent notification unless accompanied by symptoms such as respiratory distress or poor perfusion
C. Jaundice in an infant who is 4-hr old: Early-onset jaundice (within the first 24 hours) is not normal and suggests a potentially dangerous underlying condition, such as hemolytic disease of the newborn or infection. Immediate reporting and further evaluation, including bilirubin levels and possible treatment with phototherapy, are essential.
D. Acrocyanosis in an infant who is 2-hr old: Acrocyanosis (bluish discoloration of the hands and feet) is a common and benign finding in the first 24 to 48 hours after birth due to immature circulation. It does not require notification or intervention.
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