A nurse is providing care for a client who is in labor.
The nurse notes variable decelerations on the fetal heart rate monitor.
What could be the cause?
Umbilical cord compression.
Maternal hypotension.
Fetal sleep cycle.
Use of epidural anesthesia.
The Correct Answer is A
Choice A rationale:
Umbilical cord compression is the most common cause of variable decelerations. It occurs when the umbilical cord is
compressed, momentarily reducing blood flow to the fetus and causing a decrease in fetal heart rate.
Variable decelerations are characterized by their abrupt onset, variable duration, and unpredictable shape. They typically
recover quickly to the baseline fetal heart rate after the compression is relieved.
Several factors can contribute to umbilical cord compression, including:
Fetal movement: The fetus can sometimes move in a way that compresses the cord, especially during active labor.
Oligohydramnios (low amniotic fluid): With less amniotic fluid, there's less cushioning around the cord, making it more prone
to compression.
Nuchal cord (cord around the neck): If the cord is wrapped around the fetus's neck, it can become compressed during
contractions.
Short umbilical cord: A shorter cord has less slack, increasing the risk of compression.
Choice B rationale:
Maternal hypotension can cause fetal heart rate decelerations, but these typically present as late decelerations, not variable
decelerations. Late decelerations have a gradual onset, a uniform shape, and typically occur after the peak of a contraction.
Maternal hypotension can decrease placental blood flow, leading to fetal hypoxia (decreased oxygen supply). This hypoxia can
then trigger a decrease in fetal heart rate.
Choice C rationale:
The fetal sleep cycle does not typically cause variable decelerations in the fetal heart rate. During sleep, the fetal heart rate
may exhibit a decrease in baseline variability, but this is not the same as variable decelerations.
Choice D rationale:
The use of epidural anesthesia can sometimes cause a decrease in fetal heart rate variability, but it does not typically cause
variable decelerations. Epidural anesthesia can lead to maternal hypotension, which, as mentioned earlier, can cause late
decelerations.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Increasing fluid intake is not the priority action in this situation. While maintaining adequate hydration is important for
postpartum recovery, it does not directly address the immediate concern of excessive bleeding. Excessive fluid intake could
potentially worsen the bleeding by increasing blood volume and potentially increasing blood pressure.
Choice C rationale:
Helping the client use the bedpan to urinate is not the priority action in this case. While a full bladder can sometimes interfere
with uterine contraction and contribute to postpartum bleeding, it is not the most likely cause of the excessive bleeding in this
scenario. The client has already saturated two perineal pads in a short period, indicating a more significant bleeding issue that
needs to be addressed first.
Choice D rationale:
Preparing to administer tocolytic medication is not the appropriate action at this time. Tocolytic medications are used to stop
contractions, but they are not typically used to manage postpartum hemorrhage. In fact, tocolytics could potentially worsen
the bleeding by interfering with the natural mechanisms that help the uterus contract and stop bleeding after delivery.
Choice B rationale:
Checking the consistency of the client's uterine fundus is the priority action in this situation. The most common cause of
postpartum hemorrhage is uterine atony, which means the uterus is not contracting effectively to clamp down on the blood
vessels where the placenta was attached. A soft, boggy fundus is a sign of uterine atony. By assessing the fundus, the nurse can
quickly determine if uterine atony is the likely cause of the bleeding and take appropriate interventions to manage it.
Correct Answer is D
Explanation
Choice A rationale:
The location of the fundus is not a reliable indicator of urinary retention. The fundus may be displaced upward by a full
bladder, but it can also be displaced by other factors such as uterine atony or a full rectum.
In the early postpartum period, the fundus is expected to be firm and around 1-2 fingerbreadths below the umbilicus. A fundus
that is three fingerbreadths above the umbilicus may be a sign of uterine atony, but it is not specifically indicative of urinary
retention.
Choice B rationale:
Blood pressure is not a specific indicator of urinary retention. A blood pressure of 130/84 mm Hg is within the normal range
for a postpartum client.
Elevated blood pressure could be due to various factors, such as pain, anxiety, or pre-existing hypertension. It is not a reliable
sign of urinary retention on its own.
Choice C rationale:
Lochia rubra is the normal postpartum discharge that consists of blood, mucus, and tissue debris. The amount of lochia rubra
is expected to decrease gradually over time. Moderate lochia rubra is a normal finding in a client who is 8 hours postpartum
and does not suggest urinary retention.
Choice D rationale:
Moderate swelling of the labia is a common finding in the postpartum period due to increased blood flow and fluid retention.
However, significant swelling of the labia can also be a sign of urinary retention.
When the bladder is full, it can press on the surrounding tissues, including the labia, causing them to swell. If the client is also
experiencing difficulty voiding or has a decreased urine output, the swelling of the labia may be a sign that she needs to
urinate.
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