Which of the following is the priority nursing action for a client at 33 weeks of gestation with a diagnosis of placenta previa?

Choice A reason:
Administering oxygen using a non-rebreather mask is a subsequent step if initial measures do not improve fetal heart rate decelerations. It can help increase the amount of oxygen available to the fetus. Oxygen administration is a supportive measure that can be used if there are signs of fetal distress. In the scenario described, where the fetal heart rate slows after the start of a contraction with the lowest rate occurring after the peak, it suggests late decelerations, which are often associated with uteroplacental insufficiency. Administering oxygen can help increase the fetal oxygen reserve and is a common intervention during labor when there are concerns about fetal well-being.

Choice B reason:
Increasing the rate of maintenance IV infusion is typically considered when there is a concern for maternal hypotension or dehydration, which may not be the immediate cause of the observed fetal heart rate pattern. Increasing the rate of an IV infusion can help improve maternal hydration and blood pressure, which in turn can enhance placental perfusion. However, this intervention is more indirect and may not provide the immediate response needed to address fetal heart rate decelerations. It is typically considered after more direct interventions, such as repositioning the mother, have been attempted.

Choice C reason:
Elevating the client's legs can help improve venous return to the heart, potentially increasing maternal cardiac output and blood flow to the placenta. While this can be beneficial, it is not the primary intervention for late decelerations. Repositioning the mother to improve uteroplacental circulation is generally the first step.
Choice D reason:
Placing the client in the lateral position is often the first action taken when late decelerations are observed. This position helps improve uteroplacental blood flow and can quickly address potential issues related to fetal oxygenation. This position helps to relieve pressure on the inferior vena cava and aorta, which can be compressed by the gravid uterus, especially in the supine position. Relieving this pressure helps to improve uteroplacental circulation and can quickly address the cause of late decelerations, which is often related to compromised blood flow to the placenta.

Choice A reason:
This choice is incorrect because the hepatitis B vaccine is recommended to be given within 24 hours of birth, but there is no recommendation for hepatitis B immune globulin (HBIG) to be given every 12 hours for 3 days. The HBIG is typically given as a single dose.

Choice B reason:
This is the correct choice. Newborns whose mothers are positive for the hepatitis B surface antigen should receive both HBIG and the first dose of the hepatitis B vaccine within 12 hours of birth. The HBIG provides immediate protection against hepatitis B infection, and the vaccine begins the process of building long-term immunity.

Choice C reason:
This choice is incorrect because delaying the administration of HBIG and the hepatitis B vaccine until 1 week after birth would leave the newborn vulnerable to hepatitis B infection. The recommended schedule is to administer these within 12 hours of birth.

Choice D reason:
This choice is incorrect because the hepatitis B vaccine is not given monthly. The typical schedule for the hepatitis B vaccine is the first dose at birth, the second dose at 1-2 months of age, and the third dose at 6 months of age. Additionally, the vaccine is not administered based on the newborn's hepatitis B surface antigen status.