A nurse is caring for a newborn. How many blood vessels should the nurse expect to observe in the newborn's umbilical cord?

Two arteries and two veins.

One artery and one vein.

Two arteries and one vein.

Two veins and one artery.

Answer and Explanation

The Correct Answer is C

Choice A rationale:

The umbilical cord typically contains two arteries and one vein. Arteries carry oxygen-depleted blood and waste products from the fetus to the placenta for removal, while the vein carries oxygenated blood and nutrients from the placenta to the fetus. This arrangement is essential for maintaining proper fetal circulation during pregnancy.

Choice B rationale:

This choice is incorrect because the umbilical cord usually contains two arteries and one vein, not just one artery and one vein. Having only one artery could indicate a potential vascular abnormality or congenital issue that may require further investigation or medical attention.

Choice C rationale:

This is the correct answer. The umbilical cord usually contains two arteries and one vein. The presence of two arteries allows for the efficient removal of waste products and carbon dioxide from the fetus, while the single vein delivers essential nutrients and oxygen to support the baby's growth and development.

Choice D rationale:

This choice is incorrect as it states two veins and one artery, which is not the typical configuration of blood vessels in the umbilical cord. Having two veins and one artery would disrupt fetal circulation and hinder proper nutrient and waste exchange between the fetus and the placenta.

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Correct Answer is C

Explanation

Choice A rationale :

Hypercalcemia - The nurse does not need to monitor for hypercalcemia in this scenario. Hypercalcemia refers to high levels of calcium in the blood, and it is not directly related to the newborn's weight or the mother's diabetes mellitus.

Choice B rationale

Hypobilirubinemia - Hypobilirubinemia is low levels of bilirubin in the blood and is not a major concern for a newborn's weight or the mother's diabetes mellitus. Although jaundice (high bilirubin levels) can be a concern in newborns, it is not the focus in this case.

Choice C rationale

Hypoglycemia - This is the correct choice. Newborns of diabetic mothers are at risk of developing hypoglycemia, which is low blood sugar levels. The baby receives excess glucose from the mother during pregnancy, and after birth, insulin production may be higher than needed, leading to low blood sugar levels. Monitoring for hypoglycemia is crucial to prevent potential complications.

Choice D rationale

Decreased RBC - The nurse does not need to monitor for decreased red blood cells (RBC) specifically related to the newborn's weight or the mother's diabetes mellitus. Monitoring RBC levels is important for other conditions, but it is not the primary concern in this case.

A. Choice A: 0.25 mL B. Choice B: 0.5 mL C. Choice C: 0.75 mL D. Choice D: 1 mL

Correct Answer is B

Explanation

Choice A rationale:
0.25 mL - The nurse should not administer 0.25 mL because the available concentration of vitamin K injection is 1 mg/0.5 mL. To achieve the prescribed dose of 1 mg, administering only 0.25 mL would be insufficient.
Choice B rationale:
0.5 mL - This is the correct choice. The nurse should administer 0.5 mL of the vitamin K injection to deliver 1 mg of vitamin K, as the concentration of the injection is 1 mg/0.5 mL. By giving the full 0.5 mL, the newborn will receive the appropriate 1 mg dose.
Choice C rationale:
0.75 mL - Administering 0.75 mL would be excessive for the prescribed 1 mg dose of vitamin K. It is unnecessary to give a higher volume than required, as it could lead to potential adverse effects or wastage.
Choice D rationale:
1 mL - Similarly, administering the entire 1 mL of the vitamin K injection would result in doubling the prescribed dose, leading to potential overdose and adverse reactions. The nurse should avoid administering more than the necessary 0.5 mL.

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A nurse is caring for a newborn. How many blood vessels should the nurse expect to observe in the newborn's umbilical cord?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

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Correct Answer is B

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