A nurse is reviewing the ultrasound report of a client who is at 31 weeks of gestation and has pre-term labor.

Which of the following findings indicates oligohydramnios?

White blood cell count 25,000/mm3.

This indicates a potential complication of necrotizing enterocolitis (NEC), which is the death of intestinal tissue in premature or sick newborns.A high white blood cell count can be a sign of infection or inflammation in the bowel, which are common features of NEC.

Choice A is wrong because hematocrit 45% is within the normal range for newborns.

Hematocrit measures the percentage of red blood cells in the blood.

A low hematocrit can indicate blood loss or anemia, which can be complications of NEC, but a normal hematocrit does not rule out NEC.

Choice B is wrong because platelets 150,000/mm3 is also within the normal range for newborns.

Platelets are cells that help the blood clot.A low platelet count can indicate a consumption coagulopathy, which is a bleeding disorder that can occur in severe cases of NEC.

However, a normal platelet count does not exclude NEC.

Choice D is wrong because blood glucose 80 mg/dL is also within the normal range for newborns.

Blood glucose measures the amount of sugar in the blood.

A low blood glucose can indicate hypoglycemia, which can be caused by sepsis or other conditions that mimic NEC, but a normal blood glucose does not eliminate NEC.

Betamethasone is a corticosteroid that is given to pregnant women who are at risk of preterm delivery to enhance fetal lung maturity.Betamethasone stimulates the production of surfactant, a substance that lubricates the lungs and prevents them from collapsing when the baby breathes.This reduces the risk of respiratory distress syndrome and other complications in preterm infants.

Choice A is wrong because betamethasone does not reduce inflammation in the uterus.

Choice C is wrong because betamethasone does not prevent infection in the amniotic fluid.

Choice D is wrong because betamethasone does not increase blood flow to the placenta.

Normal ranges for gestational age are 37 to 42 weeks.

Preterm birth is defined as delivery before 37 weeks of gestation.Antenatal corticosteroids are recommended for women between 24 and 34 weeks of gestation who are at risk of preterm delivery within 7 days, and may be considered for women at 23 weeks of gestation or between 34 and 37 weeks of gestation depending on the clinical scenario.