A nurse is assisting in the care of a client who is in active labour. The nurse notes variable decelerations of the FHR. The nurse should identify which of the following is a cause of variable decelerations.

Choice A rationale:

Painless, bright red vaginal bleeding at 36 weeks gestation is indicative of placenta previa. Placenta previa is a condition in which the placenta partially or completely covers the cervix, leading to bleeding as the cervix begins to efface and dilate. The bright red color of the blood is due to its fresh origin from the exposed placental vessels. This condition is painless because the bleeding occurs without uterine contractions.

Choice B rationale:

Preterm labor is not the correct answer in this scenario. Preterm labor refers to the onset of regular uterine contractions leading to cervical changes before 37 weeks of gestation. In this case, the key indicator is painless bleeding, which is not associated with uterine contractions.

Choice C rationale:

Threatened abortion is also not the correct answer. Threatened abortion is the term used when a pregnant woman experiences vaginal bleeding, but the cervix is closed, indicating that there is still a chance for the pregnancy to continue. However, the bleeding in placenta previa is unrelated to fetal viability and is specifically caused by the placental position.

Choice D rationale:

Abruptio placentae is not the correct answer either. Abruptio placentae, also known as placental abruption, is a condition where the placenta prematurely separates from the uterine wall before delivery. This can cause painful bleeding due to the blood being trapped between the placenta and uterine wall. In the given scenario, the bleeding is described as painless, which does not align with the characteristics of abruptio placentae.

Choice A rationale:

Increasing the rate of the maintenance IV infusion may be a rational action in some situations, but it is not the first priority when dealing with a fetal heart rate deceleration. The priority is to address the deceleration and potential fetal distress promptly.

Choice B rationale:

Administering oxygen using a nonrebreather mask might be beneficial for the client, but it is not the primary action to take when dealing with fetal heart rate deceleration. The priority is to address the deceleration and ensure fetal well-being.

Choice C rationale:

Elevating the client's legs is unlikely to have a significant impact on fetal heart rate deceleration. This action is more relevant in cases of maternal hypotension or when trying to improve venous return to the heart. It is not the first-line intervention for fetal heart rate decelerations.

Choice D rationale:

Placing the client in the lateral (side-lying) position is the correct action to take first. This position can help relieve pressure on the vena cava, improve blood flow, and increase oxygen supply to the fetus. By changing the client's position, the nurse can potentially resolve the fetal heart rate deceleration and improve fetal well-being.