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: This statement is incorrect, as it is not the definition of polyhydramnios, but rather a possible cause of it. Polyhydramnios is a condition where the amniotic fluid volume exceeds 2,000 mL at term, or the amniotic fluid index (AFI) is greater than 25 cm. Polyhydramnios can occur in multiple pregnancies, as the fetuses produce more urine and fluid than a single fetus.

Choice B reason: This statement is incorrect, as it is not the definition of polyhydramnios, but rather a possible complication of it. Polyhydramnios can cause fetal anomalies, such as esophageal atresia, anencephaly, or neural tube defects, which impair the swallowing or absorption of the amniotic fluid. Polyhydramnios can also cause fetal growth restriction or distress, as the excess fluid can compress the umbilical cord or the placenta, and reduce the blood flow and oxygen delivery to the fetus.

Choice C reason: This statement is correct, as it is the definition of polyhydramnios, which is a condition where the amniotic fluid volume exceeds 2,000 mL at term, or the amniotic fluid index (AFI) is greater than 25 cm. Polyhydramnios can be diagnosed by ultrasound, and it can cause maternal and fetal complications, such as preterm labor, premature rupture of membranes, placental abruption, or cord prolapse.

Choice D reason: This statement is incorrect, as it is not the definition of polyhydramnios, but rather a marker of fetal anomalies. Alpha-fetoprotein (AFP) is a protein that is produced by the fetus, and it can be measured in the maternal serum or the amniotic fluid. An elevated level of AFP in the amniotic fluid can indicate fetal anomalies, such as neural tube defects, abdominal wall defects, or renal anomalies, which can cause polyhydramnios.

Choice A reason: Elevated blood pressure is a hallmark sign of preeclampsia, which is a hypertensive disorder of pregnancy that can cause serious complications, such as eclampsia, HELLP syndrome, or placental abruption. The nurse should monitor the client's blood pressure regularly and report any readings above 140/90 mm Hg to the provider.

Choice B reason: Increased urine output is not a sign of preeclampsia, but rather a normal physiological change of pregnancy, as the renal blood flow and glomerular filtration rate increase. A client with preeclampsia may have decreased urine output, which can indicate renal impairment or oligohydramnios.

Choice C reason: Joint pain is not a sign of preeclampsia, but rather a common discomfort of pregnancy, as the hormones relaxin and progesterone loosen the ligaments and joints. A client with preeclampsia may have epigastric pain, which can indicate liver involvement or impending eclampsia.

Choice D reason: Vaginal discharge is not a sign of preeclampsia, but rather a normal occurrence of pregnancy, as the cervical glands secrete more mucus to protect the uterus from infection. A client with preeclampsia may have vaginal bleeding, which can indicate placental abruption or disseminated intravascular coagulation.