Correct Answer: C

Rationale: A decrease in respiratory rate from 24 to 16 indicates that magnesium sulfate is effectively reducing central nervous system irritability, a desired therapeutic effect. This decrease in respiratory rate signifies that the drug has reached a therapeutic level to control symptoms of severe pregnancy-induced hypertension. Choices A, B, and D are incorrect because 4+ reflexes, urinary output, and body temperature are not direct indicators of achieving a therapeutic level of magnesium sulfate for controlling PIH symptoms.

Correct Answer: A

Rationale: The administration of Betamethasone (Celestone) is crucial in cases of preterm labor to promote fetal lung maturation and reduce the risk of respiratory distress syndrome in the newborn. Betamethasone helps enhance the production of surfactant in the fetal lungs, improving their functionality and decreasing the likelihood of respiratory complications upon birth. Butorphanol is an analgesic and not indicated for preventing respiratory syndrome in preterm infants. Ampicillin is an antibiotic used for infection prevention and treatment, not for fetal lung maturation. Terbutaline is a tocolytic agent used to inhibit contractions, but it does not have a direct effect on fetal lung maturity.

Correct Answer: A

Rationale: In a situation where a client is experiencing excessive uncontrolled vaginal bleeding post-delivery, the most crucial information for the nurse to provide the healthcare provider is the maternal blood pressure. Maternal blood pressure can help assess the severity of the bleeding and guide immediate interventions to stabilize the client's condition. Estimated blood loss, length of labor, and amount of IV fluids administered are important pieces of information but in this scenario, maternal blood pressure takes precedence as it directly indicates the client's current hemodynamic status.

Correct Answer: B

Rationale: The correct answer is Calcium. In this scenario, the child is displaying symptoms of muscular irritability and oozing blood, which are indicative of hypocalcemia. Calcium levels are crucial to monitor after multiple blood transfusions to prevent complications such as hypocalcemia, which can lead to these symptoms. Therefore, obtaining a serum calcium value is essential for the nurse to assess and address the child's condition effectively. CO2 combining power, Sodium, and Chloride levels are not directly associated with the symptoms described and are not the priority in this situation.

Correct Answer: D

Rationale: In the scenario presented, the client is exhibiting signs and symptoms of severe preeclampsia, including hypertension, proteinuria, facial and hand swelling, visual disturbances, and a severe headache. The medication of choice for preventing seizures in preeclampsia is magnesium sulfate. This drug helps to prevent and control seizures in clients with preeclampsia, making it the most appropriate option for this client. Clonidine hydrochloride (Choice A) is an antihypertensive medication used for managing hypertension but is not the first-line treatment for preeclampsia. Carbamazepine (Choice B) is an anticonvulsant used for seizure disorders like epilepsy and is not indicated for preeclampsia. Furosemide (Choice C) is a diuretic used to manage fluid retention but is not the drug of choice for treating preeclampsia.