A nurse is preparing to administer betamethasone (Celestone) to a client who is at 31 weeks of gestation and has pre-term labor.

What is the purpose of this medication?

Assess fetal heart rate using a Doppler device.

This is because low back pain and pelvic pressure at 36 weeks of gestation may indicate preterm labor, which can affect the fetal well-being.Therefore, the nurse should assess the fetal heart rate as a priority to determine if the fetus is in distress or not.

Choice A is wrong because tocolytic medication is used to stop uterine contractions, not to relieve low back pain and pelvic pressure.Choice B is wrong because resting in a side-lying position may help with blood circulation and reduce supine hypotensive syndrome, but it does not address the possible cause of low back pain and pelvic pressure.Choice D is wrong because assessing vaginal discharge for any change may indicate infection, rupture of membranes, or cervical dilation, but it is not as urgent as assessing fetal heart rate.

Some interventions for preventing and treating low back pain and pelvic pressure during pregnancy include exercise, water-based exercise, acupuncture, osteomanipulative therapy, craniosacral therapy, and pelvic support belts.

However, these interventions should be discussed with the health care provider before starting them.

According to the search results, magnesium sulfate can have a negative effect on the fetal heart rate (FHR) by lowering the baseline, decreasing the variability, and reducing the reactivity or acceleration pattern.Absent variability means that there is no fluctuation in the FHR and it indicates fetal hypoxia or acidosis.

This is a potential adverse effect of magnesium sulfate on the fetus and requires immediate intervention.

Choice A.Accelerations is wrong because accelerations are transient increases in the FHR that indicate fetal well-being.They are not affected by magnesium sulfate.

Choice B.Early decelerations is wrong because early decelerations are decreases in the FHR that occur with uterine contractions and are caused by fetal head compression.They are benign and do not indicate fetal distress.They are not associated with magnesium sulfate.

Choice C.Variable decelerations is wrong because variable decelerations are abrupt decreases in the FHR that vary in shape, duration, and timing and are caused by umbilical cord compression.

They may or may not indicate fetal compromise.