A nurse is reinforcing teaching with a client about the use of transcutaneous electrical nerve stimulation (TENS) to manage chronic pain.
Which of the following statements by the client indicates the need for further teaching?

Choice A rationale:

NREM (Non-Rapid Eye Movement) sleep is characterized by slow-wave sleep and is often considered restorative. It is the stage of sleep where the body repairs and regenerates tissues, and it is essential for feeling rested and rejuvenated. NREM sleep consists of three stages, with stages 3 and 4 being the deepest and most restful, also known as slow-wave sleep. These stages are essential for physical recovery.

Choice B rationale:

NREM sleep is not characterized by irregular respirations. Irregular breathing patterns are more commonly associated with certain sleep disorders, such as sleep apnea, rather than NREM sleep itself.

Choice C rationale:

NREM sleep is not characterized by increased heart rate. In fact, during NREM sleep, the body typically experiences a decrease in heart rate and blood pressure. The body's physiological functions tend to slow down during NREM sleep to promote rest and recovery.

Choice D rationale:

NREM sleep is not characterized by daytime activity. In contrast, NREM sleep occurs during the night and is a state of deep rest, during which the body is not engaged in daytime activities. It is essential for physical and mental recovery, especially after a day of activity.

Choice A rationale:
Patient-controlled analgesia (PCA) is a method of pain management that allows the patient to administer their own pain medication within specified limits, but it doesn't reduce the workload of the nurse. The nurse is responsible for setting up and monitoring the PCA pump, educating the patient, assessing their pain, and ensuring safety. Therefore, this choice is incorrect.
Choice B rationale:
PCA does not completely eliminate pain. It provides the patient with control over their pain relief by allowing them to self-administer medication within preset limits. However, it does not guarantee the complete absence of pain. Pain relief is provided within a safe dosage range, but some level of pain may still be experienced. Therefore, this choice is incorrect.
Choice C rationale:
PCA does not eliminate the risk of adverse drug effects entirely. The nurse must monitor the patient for signs of adverse effects, such as respiratory depression or sedation. While the patient has control over medication administration, there are still risks associated with opioid analgesics. Therefore, this choice is incorrect.
Choice D rationale:
The principal advantage of using patient-controlled analgesia (PCA) is that it reduces patient anxiety about pain by giving the patient more control over its management. This choice is correct because PCA empowers the patient to self-administer pain medication when needed, which can lead to better pain control and reduced anxiety. The nurse sets safe dosage limits and monitors the patient, ensuring safety while providing a sense of control.