More questions on this topic
More questions on this topic ( 15 Questions)
What is the most common cause of variable decelerations in fetal heart rate?
Uteroplacental insufficiency is the cause of late decelerations, not variable decelerations. Uteroplacental insufficiency is a decrease in the blood flow to the placenta that reduces the amount of oxygen and nutrients transferred to the fetus.
Variable decelerations are the most common type of fetal deceleration and they are caused by compression of the umbilical cord. They vary in shape, duration, and intensity and may not have a constant relationship with uterine contractions.
Maternal hypotension is one of the possible causes of late decelerations, not variable decelerations. Maternal hypotension can reduce the uteroplacental blood flow and cause fetal hypoxia.
Fetal head compression is the cause of early decelerations, not variable decelerations. Early decelerations are benign and uniform in shape and they occur when the fetal head is pressed against the cervix during a uterine contraction.
The correct answer is choice B. Umbilical cord compression. Variable decelerations are the most common type of fetal deceleration and they are caused by compression of the umbilical cord. They vary in shape, duration, and intensity and may not have a constant relationship with uterine contractions.
Choice A is wrong because uteroplacental insufficiency is the cause of late decelerations, not variable decelerations. Uteroplacental insufficiency is a decrease in the blood flow to the placenta that reduces the amount of oxygen and nutrients transferred to the fetus.
Choice C is wrong because maternal hypotension is one of the possible causes of late decelerations, not variable decelerations. Maternal hypotension can reduce the uteroplacental blood flow and cause fetal hypoxia.
Choice D is wrong because fetal head compression is the cause of early decelerations, not variable decelerations. Early decelerations are benign and uniform in shape and they occur when the fetal head is pressed against the cervix during a uterine contraction.