The nurse places a warmed blanket on the scale when weighing a newborn to minimize heat loss via which mechanism?

convection

conduction

radiation

evaporation

Answer and Explanation

The Correct Answer is B

A. Convection is the loss of heat due to air or fluid movement around the body. While keeping the newborn warm in a draft-free area can help with this, the blanket on the scale primarily addresses heat loss through contact with the cold surface.
B. Conduction occurs when heat is transferred from the baby’s body to a cooler surface that it comes into direct contact with, like the cold scale. By placing a warmed blanket on the scale, the nurse minimizes heat loss due to conduction, ensuring the baby stays warm.
C. Radiation involves heat transfer to cooler objects nearby, but a warmed blanket on the scale does not directly address heat loss through radiation.
D. Evaporation occurs when moisture on the skin evaporates, taking heat away. A warmed blanket would not primarily address evaporation; it’s meant to prevent conduction heat loss.

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Correct Answer is C

Explanation

A. Advanced maternal age may increase the risk of certain pregnancy complications, but it is not specifically associated with shoulder dystocia. Other factors, such as fetal size, are more directly related to shoulder dystocia.

B. Polyhydramnios (excess amniotic fluid) can sometimes be associated with complications during labor, but it is not the primary risk factor for shoulder dystocia. The condition most often involves difficulties with the fetal position or size rather than the amount of fluid.

C. Macrosomia (a large baby, typically defined as a birth weight over 8 pounds 13 ounces or 4000g) is the primary risk factor for shoulder dystocia. Shoulder dystocia occurs when the baby’s shoulders become stuck during delivery, often due to the larger size of the baby. The baby’s shoulders may be too broad to pass through the birth canal easily, which increases the likelihood of this complication.

D. Preterm birth is not a significant risk factor for shoulder dystocia. Preterm babies are typically smaller and less likely to encounter the same birth canal obstruction issues associated with shoulder dystocia.

A. 8.4 mEq/L B. 6.1 mEq/L C. 10.8 mEq/L D. 3.3 mEq/L

Correct Answer is B

Explanation

A. 8.4 mEq/L is above the therapeutic range and may indicate magnesium toxicity. Levels greater than 7.5–8 mEq/L can lead to loss of deep tendon reflexes, and higher levels can cause respiratory depression and cardiac arrest.
B. 6.1 mEq/L falls within the therapeutic range for magnesium sulfate when used to treat severe preeclampsia, which is generally 4.8–8.4 mEq/L (or 4–7 mEq/L depending on the source and unit of measurement). This level is considered safe and effective for preventing seizures.
C. 10.8 mEq/L is too high and indicates magnesium toxicity, placing the patient at risk for serious complications like respiratory or cardiac arrest.
D. 3.3 mEq/L is below the therapeutic range, suggesting that the dose may be inadequate to prevent eclamptic seizures in a woman with severe preeclampsia.

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The nurse places a warmed blanket on the scale when weighing a newborn to minimize heat loss via which mechanism?

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Naxlex Comprehensive Predictor Exams

The nurse knows that the occurrence of shoulder dystocia during labor is most likely related to which of the following?

Correct Answer is C

Explanation

A woman is receiving magnesium sulfate as part of her treatment for severe preeclampsia. The nurse is monitoring the woman's serum magnesium levels. The nurse determines that the drug is at a therapeutic level based on which result?

Correct Answer is B

Explanation

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