A nurse is admitting a client who has a diagnosis of preterm labor. The nurse anticipates an order by the provider for which of the following medications?

Choice A reason: Initiation of pushing is not an appropriate nursing action, as it can increase the bleeding and the risk of placental separation, which can cause fetal hypoxia, hemorrhage, or shock. Pushing is contraindicated in clients with placenta previa, which is a condition where the placenta covers the cervical opening and can cause painless, bright red bleeding in the third trimester.

Choice B reason: Examination to determine cervical status is not an appropriate nursing action, as it can cause trauma and perforation of the placenta, which can lead to severe bleeding and infection. Examination is contraindicated in clients with placenta previa, unless it is confirmed by ultrasound that the placenta is not low-lying or covering the cervix.

Choice C reason: Preparation for cesarean birth is an appropriate nursing action, as it is the preferred mode of delivery for clients with placenta previa, especially if the bleeding is heavy, the fetus is mature, or the fetal distress is present. Cesarean birth can prevent the complications of placenta previa, such as fetal hypoxia, hemorrhage, or shock.

Choice D reason: A magnesium sulfate infusion is not an appropriate nursing action, as it is a drug that prevents seizures and lowers the blood pressure in clients with severe preeclampsia, which is a hypertensive disorder of pregnancy. Magnesium sulfate is not indicated for clients with placenta previa, unless they also have severe preeclampsia or eclampsia.

Choice A reason: This statement is incorrect, as it describes the direct Coombs test, not the indirect Coombs test. The direct Coombs test is performed on the newborn's blood, and it detects the presence of maternal antibodies that have attached to the newborn's red blood cells. The direct Coombs test can help diagnose hemolytic disease of the newborn, which is a condition where the maternal antibodies destroy the newborn's red blood cells, causing anemia and jaundice.

Choice B reason: This statement is incorrect, as it is not the purpose of the indirect Coombs test, but rather a possible complication of hemolytic disease of the newborn. Kernicterus is a severe form of jaundice that occurs when the bilirubin level in the blood is very high, and it can cause brain damage, deafness, or death. Kernicterus can be prevented by treating the jaundice with phototherapy or exchange transfusion.

Choice C reason: This statement is correct, as it describes the indirect Coombs test, which is performed on the mother's blood, and it detects the presence of Rh-positive antibodies that have formed in response to the exposure to the Rh-positive blood of the newborn. The indirect Coombs test can help identify the risk of hemolytic disease of the newborn, and guide the administration of Rh immunoglobulin, which is a medication that prevents the formation of Rh-positive antibodies.

Choice D reason: This statement is incorrect, as it is not possible for the newborn to have Rh-negative antibodies, since the newborn has Rh-positive blood. Rh-negative antibodies are produced by Rh-negative individuals who have been exposed to Rh-positive blood, such as Rh-negative mothers who have Rh-positive newborns. Rh-negative antibodies can cross the placenta and attack the Rh-positive red blood cells of the newborn, causing hemolytic disease of the newborn.