A nurse is caring for a client who is receiving oxytocin for the induction of labor and notes late decelerations of the fetal heart rate on the monitor tracing. The nurse should take which of the following actions?
Administer misoprostol 25 mcg vaginally.
Place the client in a lateral position.
Administer oxygen via a face mask at 2 L/min.
Decrease the maintenance IV solution infusion rate.
The Correct Answer is B
Late decelerations are a type of fetal heart rate (FHR) pattern that indicate fetal hypoxia (lack of oxygen) due to uteroplacental insufficiency (decreased blood flow to the placenta). They are defined as a gradual decrease in FHR that occurs after the peak of a uterine contraction and returns to baseline after the end of the contraction¹. Late decelerations are associated with adverse neonatal outcomes, such as low Apgar scores, acidosis, and neonatal intensive care unit admission².
The nurse should take immediate actions to improve fetal oxygenation and blood flow when late decelerations are detected. The first and most important action is to place the client in a lateral position, either left or right, to reduce compression of the inferior vena cava and increase uterine perfusion. This can improve fetal oxygenation and reduce the severity of late decelerations¹³.
The other actions that the nurse should take are:
- Discontinue oxytocin infusion if it is being used for induction or augmentation of labor, as it can cause uterine tachysystole (excessive contractions) and worsen uteroplacental insufficiency¹³.
- Administer oxygen to the client at 8 to 10 L/min via a nonrebreather face mask to increase maternal oxygen saturation and fetal oxygen delivery¹³.
- Increase intravenous (IV) fluid infusion rate to maintain maternal hydration and blood pressure, which can improve uterine blood flow¹³.
- Notify the provider and prepare for possible operative delivery if late decelerations persist or fetal distress occurs¹³.
- Provide emotional support and reassurance to the client and family, as late decelerations can cause anxiety and fear⁴.
The other options are not actions that the nurse should take:
- a) Administer misoprostol 25 mcg vaginally. This is not correct because misoprostol is a medication that is used to induce labor by ripening the cervix and stimulating contractions. It is not indicated for late decelerations and can cause uterine hyperstimulation and fetal distress⁵.
- c) Administer oxygen via a face mask at 2 L/min. This is not correct because this is too low of an oxygen flow rate to improve fetal oxygenation. The recommended oxygen flow rate for late decelerations is 8 to 10 L/min via a nonrebreather face mask¹³.
- d) Decrease the maintenance IV solution infusion rate. This is not correct because this can cause maternal dehydration and hypotension, which can reduce uterine blood flow and worsen fetal hypoxia. The nurse should increase the IV fluid infusion rate to maintain maternal hydration and blood pressure¹³.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Hemolytic disease of the newborn (HDN) is a condition that occurs when there is an incompatibility between the blood types of the mother and the baby. It causes the mother's immune system to produce antibodies that attack and destroy the baby's red blood cells, leading to anemia, jaundice, organ enlargement, and other complications¹.
One of the most common causes of HDN is Rh incompatibility. This happens when the mother is Rh negative and the baby is Rh positive. The Rh factor is a protein that can be present or absent on the surface of red blood cells. People who have the protein are Rh positive and people who do not have it are Rh negative
Rh incompatibility can cause HDN when the baby's Rh positive blood cells cross the placenta and enter the mother's bloodstream. This can happen during delivery, miscarriage, abortion, or invasive prenatal testing. The mother's immune system recognizes the baby's blood cells as foreign and produces antibodies against them. These antibodies can cross back to the baby's bloodstream and attack the baby's red blood cells, causing hemolysis (breakdown) and anemia².
HDN due to Rh incompatibility usually does not affect the first pregnancy, because the mother has not been exposed to Rh positive blood before and has not developed antibodies yet. However, it can affect subsequent pregnancies with Rh positive babies, because the mother has become sensitized and has antibodies ready to attack².
The other options are not causes of HDN:
- a) The mother and the father are both Rh negative. This is not a cause of HDN because both parents have the same Rh factor and there is no incompatibility between them. The baby will also be Rh negative and will not trigger an immune response from the mother².
- b) The mother and the father are both Rh positive. This is not a cause of HDN because both parents have the same Rh factor and there is no incompatibility between them. The baby will also be Rh positive and will not trigger an immune response from the mother².
- c) The mother is Rh positive and the father is Rh negative. This is not a cause of HDN because the mother has a dominant Rh factor and will not produce antibodies against it. The baby will either be Rh positive or Rh negative, depending on whether they inherit the father's gene or not. In either case, the baby's blood type will not trigger an immune response from the mother².
Correct Answer is D
Explanation
A pudendal nerve block is a local anesthetic administered to block the pudendal nerve, which supplies sensation to the perineum and external genitalia. It is commonly used during childbirth to provide pain relief during the second stage of labor.
An adverse effect of a pudendal nerve block is a decreased ability to bear down, or a decreased ability to push effectively during labor. This is because the block affects the nerves responsible for the contraction of the pelvic floor muscles, which are necessary for effective pushing during delivery.
Option a) Uterine hyperstimulation is not an adverse effect of a pudendal nerve block. Uterine hyperstimulation refers to excessive contractions of the uterus, often caused by medications such as oxytocin. Pudendal nerve block does not directly affect uterine contractions.
Option b) Maternal hypertension is not an adverse effect of a pudendal nerve block. Hypertension refers to
high blood pressure, and it is not typically associated with a pudendal nerve block.
Option c) Fetal bradycardia is not a common adverse effect of a pudendal nerve block. Fetal bradycardia refers to a slow heart rate in the fetus. While fetal heart rate monitoring is important during labor, bradycardia is not typically associated with a pudendal nerve block.
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