A nurse is evaluating the fetal heart rate tracing of a client who is in pre-term labor and receiving magnesium sulfate.
The nurse should identify that which of the following patterns indicates a potential adverse effect of the medication on the fetus?
Accelerations
Early decelerations
Variable decelerations
Absent variability
The Correct Answer is D
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Nitrazine paper test.
This test involves putting a drop of fluid obtained from the vagina onto paper strips containing nitrazine dye.
The strips change color depending on the pH of the fluid.The strips will turn blue if the pH is greater than 6.0, which indicates the presence of amniotic fluid.This test can help confirm rupture of membranes (ROM) in pregnancy, especially when preterm labor is suspected.
Choice B. Ferning test.This test involves examining a sample of vaginal fluid under a microscope and looking for a fern-like pattern that is formed by dried amniotic fluid crystals.This test can also help confirm ROM, but it is less reliable than the nitrazine test because other substances such as cervical mucus, semen, or blood can also cause ferning.
Choice C. Amniotic fluid index.This test involves measuring the amount of amniotic fluid in the uterus using ultrasound.This test can help assess the fetal well-being and detect conditions such as oligohydramnios (low amniotic fluid) or polyhydramnios (high amniotic fluid).This test cannot confirm ROM by itself, but it can be used in combination with other tests to evaluate the status of the pregnancy.
Choice D. Biophysical profile.This test involves using ultrasound and a fetal monitor to assess the fetal heart rate, breathing, movement, muscle tone, and amniotic fluid volume.
Correct Answer is A
Explanation
A white blood cell count of 12,000/mm3 indicates an infection that can trigger pre-term labor.The normal range for white blood cell count in pregnancy is 5.7-15.0×10 9 /L, which is equivalent to 5,700-15,000/mm3.
A count above this range suggests an inflammatory response to an infection.
Choice B is wrong because a hemoglobin level of 11 g/dL is within the normal range for pregnancy, which is 10-14 g/dL.
Choice C is wrong because a platelet count of 250,000/mm3 is within the normal range for pregnancy, which is 150,000-400,000/mm3.
Choice D is wrong because a blood glucose level of 90 mg/dL is within the normal range for pregnancy, which is 70-110 mg/dL.
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