A woman is being treated for preterm labor with magnesium sulfate. Which finding by the nurse indicates magnesium sulfate toxicity?
Select one:

Choice A Reason: Rule out a suspected hydatidiform mole. This is an incorrect answer that describes an unlikely condition for this client. A hydatidiform mole is a type of gestational trophoblastic disease where abnormal placental tissue develops instead of a normal fetus. A hydatidiform mole can cause vaginal bleeding, hyperemesis gravidarum (severe nausea and vomiting), preeclampsia, and hyperthyroidism. A hydatidiform mole usually causes a fundal height measurement that is larger than expected for gestational age, not smaller.

Choice B Reason: Assess for congenital anomalies. This is an incorrect answer that implies that the client has not had a previous ultrasound to screen for fetal anomalies. Congenital anomalies are structural or functional defects that are present at birth, such as cleft lip, spina bifida, or Down syndrome. Ultrasound can detect some congenital anomalies by visualizing the fetal anatomy and morphology. However, ultrasound screening for fetal anomalies is usually done between 18 and 22 weeks of gestation, not at 32 weeks.

Choice C Reason: Determine fetal presentation. This is an incorrect answer that suggests that the client has an uncertain fetal presentation. Fetal presentation is the part of the fetus that is closest to the cervix, such as vertex (head), breech (butocks or feet), or transverse (shoulder). Fetal presentation can affect the mode and outcome of delivery. Ultrasound can determine fetal presentation by locating the fetal head and spine. However, fetal presentation can also be assessed by abdominal palpation or vaginal examination, which are simpler and less invasive methods.

Choice D Reason: Monitor fetal growth. This is because fundal height measurement is a method of estimating fetal size and gestational age by measuring the distance from the pubic symphysis to the top of the uterus (fundus) in centimeters. A fundal height measurement that is significantly smaller or larger than expected for gestational age may indicate intrauterine growth restriction (IUGR) or macrosomia, respectively. IUGR means that the fetal growth is slower than expected for gestational age, which can increase the risk of fetal distress, hypoxia, acidosis, and stillbirth. Macrosomia means that the fetal weight is higher than expected for gestational age, which can increase the risk of birth injuries, shoulder dystocia, cesarean delivery, and hypoglycemia. Ultrasound is a more accurate way of assessing fetal size and growth by measuring various parameters such as biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), and femur length (FL). Ultrasound can also detect other factors that may affect fetal growth such as placental function, amniotic fluid volume, umbilical cord blood flow, and fetal anomalies.

Choice A Reason: Frequent voiding encourages sphincter control. This is an incorrect statement that has no relevance to labor and delivery. Sphincter control refers to the ability to contract and relax the muscles that control urination and defecation. It is not affected by frequent voiding.

Choice B Reason: A full bladder impedes oxygen flow to the fetus. This is an incorrect statement that confuses a full bladder with a prolapsed cord. A prolapsed cord is a condition where the umbilical cord slips through the cervix before the baby and becomes compressed by the fetal head, which can reduce oxygen flow to the fetus. A full bladder does not affect oxygen flow to the fetus.

Choice C Reason: Frequent voiding prevents bruising of the bladder. This is an incorrect statement that exaggerates the effect of a full bladder on the bladder wall. A full bladder may cause some pressure or discomfort on the bladder, but it does not cause bruising or damage.

Choice D Reason: A full bladder can impede fetal descent. This is a correct statement that explains why it is important for the nurse to assess the bladder regularly and encourage the laboring client to void every 2 hours.