The nurse preceptor is teaching about the physiology of the fetal heart rate (FHR) pattern. Which statement by the student indicates a lack of understanding?
Vagus nerve stimulation increases FHR variability.
Baroreceptors are responsible for regulating blood pressure.
The autonomic nervous system controls the FHR.
Chemoreceptors respond to changes in blood gas levels.
The Correct Answer is A
Choice A rationale
This statement is incorrect. Vagus nerve stimulation actually decreases FHR variability. The vagus nerve, part of the parasympathetic nervous system, slows the heart rate and reduces variability.
Choice B rationale
This statement is correct. Baroreceptors are sensors located in blood vessels that help regulate blood pressure by detecting changes in the stretch of the vessel walls. They play a crucial role in maintaining stable blood pressure levels.
Choice C rationale
This statement is correct. The autonomic nervous system, which includes the sympathetic and parasympathetic nervous systems, controls the fetal heart rate. It regulates the balance between heart rate acceleration and deceleration.
Choice D rationale
This statement is correct. Chemoreceptors respond to changes in blood gas levels, such as oxygen and carbon dioxide. They help regulate respiratory and cardiovascular responses to maintain homeostasis.
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Correct Answer is C
Explanation
Choice A rationale
A pulse of 88 bpm is within the normal range for an adult and does not indicate any immediate concern that needs to be reported to the anesthesia provider.
Choice B rationale
A pain level of 1 on a 0 to 10 scale indicates that the epidural is effectively managing the client’s pain. This is a positive outcome and does not require reporting.
Choice C rationale
Blood pressure of 88/52 mmHg indicates hypotension, which is a common and potentially serious side effect of epidural anesthesia. Hypotension can lead to decreased placental perfusion and fetal distress, so it requires immediate attention and reporting to the anesthesia provider.
Choice D rationale
Dizziness can be a side effect of epidural anesthesia, but it is not as critical as hypotension. It should be monitored, but it does not require immediate reporting unless it is severe or accompanied by other symptoms.
Correct Answer is B
Explanation
Choice A rationale
Encouraging the client to continue pushing is not appropriate at this stage. The client is 9 cm dilated, which indicates that she is in the transition phase of labor, not yet fully dilated and ready to push. Pushing at this stage could cause cervical swelling and delay progress.
Choice B rationale
Preparing the client for delivery is the most appropriate action. The client is in the transition phase of labor, with 9 cm dilation, 100% effacement, and +1 station. This indicates that delivery is imminent, and the nurse should prepare for the birth process.
Choice C rationale
Administering pain relief as prescribed may be considered, but it is not the priority action at this stage. The client is in the transition phase, and administering pain relief could interfere with the natural progression of labor. Non-pharmacological support may be more appropriate.
Choice D rationale
Reassuring the client and providing emotional support is important, but it is not the primary action at this stage. The nurse should focus on preparing for delivery while also providing support and reassurance.