A nurse is assisting with the monitoring of a client who is in the first stage of labor, with an external fetal monitor in place and IV fluids infusing. Which of the following factors will cause variable decelerations in the fetal heart rate?
Fetal head compression.
Umbilical cord compression.
Maternal opioid administration.
Uteroplacental insufficiency.
The Correct Answer is B
Choice A rationale:
Fetal head compression is unlikely to cause variable decelerations in the fetal heart rate. During contractions and labor, the fetal head may experience pressure, but this usually leads to early decelerations, not variable decelerations. Early decelerations are considered benign and are caused by the head's pressure stimulating the vagus nerve, resulting in a temporary decrease in heart rate.
Choice B rationale:
Umbilical cord compression is a known cause of variable decelerations in the fetal heart rate. When the umbilical cord is compressed, it can temporarily disrupt blood flow and oxygen supply to the fetus, leading to decelerations. Variable decelerations often appear as abrupt, sharp drops in the fetal heart rate and are typically characterized by their unpredictable
nature.
Choice C rationale:
Maternal opioid administration is not a direct cause of variable decelerations in the fetal heart rate. While opioids can cross the placenta and may affect the fetus, they are more likely to cause other issues, such as respiratory depression in the newborn, rather than variable decelerations.
Choice D rationale:
Uteroplacental insufficiency is not the primary factor causing variable decelerations. Uteroplacental insufficiency refers to an inadequate blood flow and oxygen delivery to the placenta, which can lead to late decelerations in the fetal heart rate, not variable decelerations.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
The correct answer is choice D. Uterine contraction lasting 2 min.
Choice A rationale:
Early decelerations in the FHR are usually not a concern during the second stage of labor. They are a normal physiological response to the compression of the fetal head during contractions and are generally considered benign.
Choice B rationale:
Pelvic pressure with contractions is a normal finding during the second stage of labor as the baby descends into the pelvis. It does not typically require reporting to the provider unless it is associated with other concerning symptoms.
Choice C rationale:
A bloody show from the vagina is a common and expected finding during the second stage of labor. It indicates that the cervix is dilating and effacing, which is a normal part of the labor process.
Choice D rationale:
A uterine contraction lasting 2 minutes is abnormal and could indicate uterine tachysystole, which can lead to fetal distress due to reduced uterine blood flow and oxygen to the fetus. This finding should be reported to the provider immediately.
Correct Answer is A
Explanation
Step 1 is assessing heart rate. A heart rate of 130/min earns 2 points since a rate above 100/min is optimal.
Step 2 is assessing respiratory effort. A lusty cry earns 2 points as strong crying indicates good respiratory function.
Step 3 is assessing muscle tone. Flexed extremities earn 1 point since full active movement would score 2.
Step 4 is assessing reflex irritability. Grimace when suctioned earns 1 point as a vigorous response (cough, sneeze) would score 2.
Step 5 is assessing color. Acrocyanosis earns 1 point since a fully pink body scores 2.
Final answer: 7
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