Which statement about fetal circulation is true?

Fetal circulation is no longer effective at birth.

Fetal circulation continues until red blood cells are broken down.

Fetal circulation continues until after the stress of labor.

Fetal circulation continues until adulthood.

Answer and Explanation

The Correct Answer is C

Fetal circulation continues until after the stress of labor.

Choice A rationale:

Fetal circulation undergoes significant changes at birth. It becomes ineffective as the transition from intrauterine to extrauterine life occurs. The foramen ovale and ductus arteriosus, which allow blood to bypass certain fetal circulatory pathways, close as the baby breathes for the first time.

Choice B rationale:

Fetal circulation does not continue until red blood cells are broken down. Red blood cells in a fetus have a shorter lifespan than those in adults and are continually replaced throughout gestation. However, their breakdown is not the reason for the changes in fetal circulation.

Choice C rationale:

The correct answer. Fetal circulation continues until after the stress of labor. During labor, the baby experiences increased stress and pressure, which helps trigger various physiological changes, including the closure of specific fetal circulatory shunts.

Choice D rationale:

Fetal circulation does not continue until adulthood. As mentioned earlier, the transition from fetal to adult circulation occurs during and after birth, with the closure of specific fetal shunts and the establishment of a fully functional adult circulatory system.

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Correct Answer is A

Explanation

Choice A rationale:

This is the priority finding because a bilirubin level of 18 mg/dL in a 4-hour-old newborn is significantly elevated. High bilirubin levels in newborns can lead to jaundice, which can be harmful if not promptly addressed. Hyperbilirubinemia in newborns requires close monitoring and, in some cases, treatment with phototherapy.

Choice B rationale:

A hemoglobin level of 22 g/dL is within the normal range for a newborn and is not a priority concern at this time.

Choice C rationale:

A blood glucose level of 50 mg/dL is within the normal range for a newborn. While monitoring blood glucose levels is essential, it is not the priority in this situation.

Choice D rationale:

A platelet count of 200,000/mm³ is within the normal range for a newborn and does not require immediate action.

A. The fit of the newborn's clothes. B. The number of wet diapers per day. C. How often the newborn cries. D. The newborn's skin turgor.

Correct Answer is B

Explanation

Choice A rationale:

The fit of the newborn's clothes is not a reliable indicator of hydration. It may vary based on the clothing size or style and does not give a direct measure of the newborn's hydration status. This choice is not appropriate for evaluating hydration and is therefore incorrect.

Choice B rationale:

The number of wet diapers per day is an essential measure for assessing a newborn's hydration. In the first few days after birth, the baby should have at least one wet diaper for each day of life (e.g., one wet diaper on day one, two on day two, etc.). Afterward, the newborn should have around 6-8 wet diapers per day, which indicates adequate hydration. This choice is appropriate and the correct answer.

Choice C rationale:

How often the newborn cries can be influenced by various factors, including hunger, discomfort, or sleepiness. While crying can indicate the baby's needs, it is not a specific or accurate measure of hydration status. Therefore, this choice is not appropriate for evaluating hydration and is incorrect.

Choice D rationale:

The newborn's skin turgor is a measure of skin elasticity, commonly used in adults to assess hydration. However, it is not a reliable indicator of hydration in newborns, as their skin is more elastic and different from adult skin. Skin turgor is not a suitable parameter to evaluate newborn hydration, making this choice incorrect.

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Which statement about fetal circulation is true?

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Naxlex Comprehensive Predictor Exams

A nurse is reviewing the laboratory results of a newborn that is 4 hr old. Which of the following findings should the nurse identify as the priority?

Correct Answer is A

Explanation

A nurse is caring for a client who is breastfeeding and tells the nurse that she is concerned about her newborn's hydration. Which of the following nursing observations is appropriate to use in evaluating the adequacy of the newborn's hydration?

Correct Answer is B

Explanation

The nurse enters the room and notices that the room feels cold. The mother says, "He has been crying and kicking and now he seems very tired.”. What is the nurse's priority concern?

A home health care nurse is reinforcing teaching about breast engorgement with a client who is postpartum and is breastfeeding her newborn. Which of the following client statements indicates an understanding of the teaching?

A nurse in the newborn nursery is receiving a report on four newborns. Which of the following newborns should the nurse see first?

A newborn is most interested in eating in which wake and sleep state?

Which newborn is at the lowest risk for elevated unconjugated bilirubin levels?

Exhibit 1. A nurse understands which of the following assessment findings as a priority to indicate that a newborn may be experiencing cold stress and burning brown fat to produce heat? (Select all that apply.).

A nurse is reinforcing teaching about phenylketonuria (PKU) testing with the parent of a newborn. Which of the following statements by the parent indicates a need for further teaching?