A client with premature rupture of membranes (PROM) is being evaluated. Which test confirms that there is amniotic fluid present?

The nonstress test (NST) evaluates fetal oxygenation by monitoring the fetal heart rate response to spontaneous fetal movement. A reactive result requires 2 or more accelerations within 20 minutes, indicating a healthy autonomic nervous system. This non-invasive assessment detects potential placental insufficiency or fetal hypoxia.

A. Measure amniotic fluid: Quantifying fluid volume is performed via ultrasound to calculate the amniotic fluid index (AFI). While often paired with an NST to form a biophysical profile, the NST itself uses electronic fetal monitoring to track heart rate patterns only. It does not provide data on fluid pockets.

B. Determine fetal lung maturity: Lung maturity is assessed through an amniocentesis to measure the lecithin-sphingomyelin ratio or the presence of phosphatidylglycerol. The NST is a functional assessment of current oxygenation and neurological status, not a biochemical analysis of surfactant production in fetal lungs.

C. Assess fetal well-being: The primary goal is to confirm that the fetus is adequately oxygenated and has an intact central nervous system. Accelerations in response to movement indicate that the fetal brain is receiving sufficient perfusion. It is the first-line screening tool for high-risk pregnancies.

D. Detect genetic disorders: Screening for chromosomal abnormalities like Trisomy 21 involves maternal serum markers, cell-free DNA testing, or chorionic villus sampling. An NST cannot identify genetic sequences or structural malformations. It only monitors the physiological responses of the fetus at that specific moment.

Proper gestational nutrition involves balancing increased caloric requirements with food safety practices to avoid foodborne pathogens. Pregnant clients must manage their intake of stimulants and fluids to maintain amniotic fluid levels and maternal homeostasis. Avoiding teratogenic contaminants is a primary goal of prenatal counseling.

A. Increase calories by 300-500 daily: Metabolic demands rise during the second and third trimesters to support tissue synthesis and fetal growth. An additional 300 to 500 kilocalories daily is generally sufficient to achieve the recommended weight gain goals. Excessive intake can lead to gestational diabetes.

B. Drink 8-10 glasses of water: Adequate hydration is necessary to support the expanded vascular system and the production of amniotic fluid. It also helps prevent common pregnancy complications like urinary tract infections and constipation. Proper fluid balance maintains optimal utero-placental perfusion throughout the day.

C. Avoid raw meat: Raw or undercooked meats may harbor Toxoplasma gondii or Listeria monocytogenes, which cause severe congenital infections. These pathogens can cross the placenta and lead to fetal demise or neurological impairment. Ensuring meat is cooked to safe temperatures is essential.

D. Limit caffeine to 200 mg/day: High caffeine intake is associated with vasoconstriction of the uterine arteries and a higher risk of miscarriage. Restricting consumption to less than 200 mg per day minimizes the risk of fetal growth restriction. It helps prevent maternal tachycardia and insomnia.

E. Avoid all dairy: This is incorrect; dairy is a primary source of calcium and protein necessary for pregnancy. Clients should only avoid unpasteurized dairy products, such as soft cheeses, to prevent listeriosis. Pasteurized milk, yogurt, and hard cheeses are highly beneficial for fetal bone health.