A nurse is caring for a client who is at 35 weeks of gestation and has pre-term labor with intact membranes and no signs of infection.

The provider prescribes indomethacin to inhibit prostaglandin synthesis and suppress uterine contractions.

Which of the following laboratory tests should the nurse monitor while the client is receiving this medication?

Tocolytics are a category of drugs used to delay the labor process.These may be used in situations when a pregnant person begins showing signs of preterm labor —which is any time before 37 weeks of completed pregnancy.Tocolytics may help delay labor by two to seven days.

Some possible explanations for the other choices are:

• Choice A. Administering intravenous fluids.

This is not a correct answer because intravenous fluids are not effective in suppressing uterine contractions.They may be used to correct dehydration or electrolyte imbalance, which can sometimes trigger preterm labor, but they are not a primary intervention for preterm labor.

• Choice C. Administering corticosteroids.

This is not a correct answer because corticosteroids are not tocolytics.They do not stop or slow down uterine contractions, but they help accelerate fetal lung maturity and reduce the risk of neonatal respiratory distress syndrome and other complications of prematurity.

Corticosteroids are often given along with tocolytics, but they have a different function and mechanism of action.

• Choice D. Administering antibiotics.

This is not a correct answer because antibiotics are not tocolytics.They may be used to treat infections that can cause or complicate preterm labor, such as chorioamnionitis or group B streptococcus, but they do not directly affect uterine contractions.

Antibiotics may be given along with tocolytics, but they have a different function.

Report any increase in vaginal discharge to the provider.This is because an increase in vaginal discharge can indicate an infection, which can trigger preterm labor or cause complications for the mother and the baby.

Choice A is wrong because sexual intercourse is not contraindicated for women who have preterm labor that was successfully stopped with tocolytic therapy, unless they have other risk factors such as placenta previa or ruptured membranes.

Choice B is wrong because drinking at least 3 L of fluids per day is not necessary for women who have preterm labor that was successfully stopped with tocolytic therapy, unless they have dehydration or oligohydramnios.

Choice D is wrong because pelvic floor exercises are not recommended for women who have preterm labor that was successfully stopped with tocolytic therapy, as they can increase uterine activity and cause contractions.

Tocolytic therapy is the use of drugs to delay delivery for a short time (up to 48 hours) if a woman begins labor too early in her pregnancy.

The purpose of tocolytic therapy is to allow time for the administration of corticosteroids or other medicine.