Fetal heart rate pattern interpretation and labor complication management scenarios tested on USMLE Step 2 CK.
33 cards · mixed cards · AI-written, checked twice. Edit anything.
- What causes early decelerations in FHR tracings?
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Fetal head compression- How do early decelerations relate in timing to uterine contractions?
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They mirror the contraction: onset, nadir, and recovery coincide with the contraction's start, peak, and end- What causes variable decelerations in FHR tracings?
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Umbilical cord compression- What is the characteristic shape of variable decelerations?
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Abrupt onset and offset, with variable depth, duration, and shape (not mirroring contractions)- What causes late decelerations in FHR tracings?
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Uteroplacental insufficiency- How do late decelerations relate in timing to uterine contractions?
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Gradual onset after the contraction begins, nadir after the contraction's peak, and gradual return to baseline- What does a Category I FHR tracing indicate?
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A normal tracing predictive of normal fetal acid-base status at the time of observation- What does a Category II FHR tracing indicate?
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An indeterminate tracing, not predictive of abnormal fetal acid-base status but requiring continued surveillance- What tracing features define a Category III FHR pattern?
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Absent baseline variability with recurrent late decelerations, recurrent variable decelerations, or bradycardia, or a sinusoidal pattern- What is the initial management approach for a Category III FHR tracing?
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Start intrauterine resuscitation measures, and expedite delivery if there is no improvement- A sinusoidal FHR pattern is classically associated with which fetal condition?
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Severe fetal anemia- In intrauterine resuscitation, how should the mother be positioned?
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Left lateral decubitus position- What fluid intervention is part of intrauterine resuscitation?
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An IV fluid bolus- What should be done with oxytocin during intrauterine resuscitation for a nonreassuring tracing?
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Discontinue or decrease the oxytocin infusion- What supplemental measure is given to the mother during intrauterine resuscitation?
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Supplemental oxygen
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