A nurse is preparing to administer acyclovir 400 mg tablet PO three times per day. Available are 800 mg tablets.

How many tablets should the nurse administer with each dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Choice A rationale

A nonstress test (NST) typically takes 20 to 40 minutes to complete, not 2 to 4 hours. The duration is usually sufficient to observe fetal heart rate accelerations in response to fetal movement, which is the primary indicator of fetal well-being during the test.

Choice B rationale

A nonstress test is performed to assess fetal well-being, especially in pregnancies at risk for uteroplacental insufficiency, such as those with post-term gestation, pre-eclampsia, or diabetes, not specifically because it is a first pregnancy.

Choice C rationale

The nonstress test primarily measures the fetal heart rate patterns in response to fetal movement. Contraction strength is measured during a contraction stress test or by internal uterine pressure catheter, which is a different diagnostic procedure.

Choice D rationale

The nonstress test evaluates the fetal heart rate accelerations in response to spontaneous fetal movement. This indicates a healthy central nervous system and adequate oxygenation of the fetus. A reactive NST shows at least two accelerations of 15 bpm above baseline, lasting at least 15 seconds, within a 20-minute period.

Choice A rationale

Iron is essential for the production of hemoglobin, which is the oxygen-carrying protein in red blood cells. During pregnancy, maternal blood volume increases significantly, requiring a greater production of red blood cells to meet the increased oxygen demands of both the mother and the developing fetus. The recommended daily intake for pregnant women is 27 mg.

Choice B rationale

Calcium is crucial for fetal bone and tooth development, as well as for maintaining maternal bone health. While important, it does not directly contribute to the increase in maternal blood volume. The recommended daily intake is 1000 mg for pregnant women.

Choice C rationale

Vitamin E is an antioxidant that plays a role in protecting cells from damage. While it has various physiological functions, it is not directly involved in the process of increasing maternal blood volume.

Choice D rationale

Vitamin D is important for calcium absorption and bone health in both the mother and the fetus. It also plays a role in immune function. However, it does not directly contribute to the increase in maternal blood volume. The recommended daily intake is 600 IU for pregnant women.