The most common cause of decreased variability in the FHR that lasts 20 minutes or less is:
Fetal sleep cycles.
Head compression during contractions.
Fetal hypoxemia.
Umbilical cord compression.
The Correct Answer is A
Choice A rationale
Fetal sleep cycles cause temporary decreased variability in FHR, typically lasting 20 minutes or less. FHR baseline remains normal. Normal FHR variability is 6-25 bpm.
Choice B rationale
Head compression during contractions leads to early decelerations in FHR, not decreased variability. Early decelerations are a normal response to pressure on the fetal head.
Choice C rationale
Fetal hypoxemia causes decreased variability but usually persists for longer than 20 minutes. It indicates compromised oxygen supply, requiring immediate intervention.
Choice D rationale
Umbilical cord compression leads to variable decelerations in FHR rather than decreased variability. These decelerations vary in onset, duration, and intensity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B"]
Explanation
Choice A rationale
Calling for help and notifying the care provider ensures that expert medical assistance is available promptly for any emergency interventions required.
Choice B rationale
Getting help and preparing the operating room ensures readiness for an immediate cesarean section if fetal distress persists and the situation does not improve rapidly.
Choice C rationale
Starting Pitocin is inappropriate during fetal distress as it may further stress the fetus by increasing contraction frequency and intensity, potentially worsening the situation.
Choice D rationale
Inserting a Foley catheter does not address the immediate concern of fetal distress and would not provide immediate benefit in improving fetal heart rate.
Choice E rationale
Repeating uterine resuscitation measures (e.g., repositioning, oxygen, IV fluids) is essential, but if they are ineffective, additional interventions, such as preparing for possible surgical delivery, are needed.
Correct Answer is B
Explanation
Choice A rationale
Fetal movement felt by the pregnant woman is a presumptive sign of pregnancy, indicating probable fetal presence, but not definitive evidence.
Choice B rationale
Fetal heart rate noted on ultrasound is a positive sign of pregnancy, providing objective evidence of fetal existence within the uterus.
Choice C rationale
A positive pregnancy test indicates probable pregnancy due to hormonal presence, but it is not a definitive confirmation without further clinical evidence.
Choice D rationale
Braxton Hicks contractions are considered probable signs of pregnancy, as they indicate uterine activity without confirming the presence of a fetus.
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