A client comes to the prenatal clinic for her first visit. When determining the client's estimated due date, the nurse understands that which method is the most accurate?

Choice A Reason: This is incorrect because difficulty in arousing is a sign of magnesium toxicity, which is a serious complication of magnesium sulfate therapy. Magnesium toxicity can cause central nervous system depression, muscle weakness, and cardiac arrest. The nurse should monitor the client's level of consciousness and stop the infusion if the client becomes lethargic or unresponsive.

Choice B Reason: This is correct because deep tendon reflexes 2+ indicate a normal and expected response to magnesium sulfate therapy. Magnesium sulfate is a muscle relaxant that can reduce the risk of seizures in gestational hypertension. The nurse should assess the client's deep tendon reflexes regularly and maintain them at 2+ or slightly diminished.

Choice C Reason: This is incorrect because urinary output of 30 mL per hour is below the normal range of 40 to 80 mL per hour and may indicate renal impairment or dehydration. Magnesium sulfate can cause renal toxicity or fluid retention, which can affect the urinary output. The nurse should monitor the client's urinary output and fluid balance and report any abnormalities to the doctor.

Choice D Reason: This is incorrect because respiratory rate of 10 breaths/minute is below the normal range of 12 to 20 breaths/minute and may indicate respiratory depression. Magnesium sulfate can cause respiratory depression or failure, which can be life-threatening. The nurse should monitor the client's respiratory rate and oxygen saturation and administer oxygen or antidote if needed.

Choice A Reason: This is correct because cloudy malodorous fluid indicates that the amniotic fluid is contaminated with bacteria or other microorganisms that can cause infection in the woman or the fetus. Normally, amniotic fluid is clear and odorless.

Choice B Reason: This is correct because abdominal tenderness suggests that the woman has inflammation or irritation of the uterus or other pelvic organs due to infection. Abdominal tenderness can also be accompanied by cramping, pain, or fever.

Choice C Reason: This is correct because fetal bradycardia, which is a slow fetal heart rate below 110 beats per minute, indicates that the fetus is experiencing distress or hypoxia due to infection. Fetal bradycardia can be detected by electronic fetal monitoring or Doppler device.

Choice D Reason: This is correct because elevated maternal pulse rate, which is a heart rate above 100 beats per minute, indicates that the woman has an increased metabolic demand or systemic inflammation due to infection. Elevated maternal pulse rate can also be caused by dehydration, anxiety, or pain.

Choice E Reason: This is incorrect because decreased C-reactive protein levels do not indicate infection. C-reactive protein (CRP) is a protein that is produced by the liver in response to inflammation or infection. Increased CRP levels can be a sign of infection, but decreased CRP levels can be normal or indicate other conditions such as liver disease or malnutrition.