ATI Capstone Week 11 Exam | Nurselytic

Correct Answer: D

Rationale: The correct interpretation is choice D: Variable decelerations are due to umbilical cord compression. Variable decelerations are abrupt decreases in the fetal heart rate that are often V-shaped on the monitor strip. They are typically caused by compression of the umbilical cord, leading to decreased oxygen supply to the fetus. This is a common finding in the first stage of labor and can be managed by changing the mother's position to relieve pressure on the umbilical cord.


Choice A is incorrect because uteroplacental insufficiency typically presents with late decelerations, not variable decelerations.
Choice B is incorrect as fetal head compression usually results in early decelerations.
Choice C is incorrect because IV narcotics may cause late decelerations, not variable decelerations.

In summary, variable decelerations are most commonly caused by umbilical cord compression, not uteroplacental insufficiency, fetal head compression, or IV narcotics.

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