A nurse is teaching a group of students about pain. The students demonstrate understanding if they describe pain as:

Patient-controlled analgesia (PCA) is a method that allows clients to self-administer small doses of opioid medication to manage pain. It provides a safe, controlled, and timely approach to pain relief. It is essential that clients understand how to use the PCA appropriately and recognize when to notify the nurse if the pain is not being effectively controlled.

Rationale for Correct Answer:

C. “I should tell the nurse if the pain doesn’t stop after I use this device.”: This shows appropriate understanding that PCA is intended to relieve pain, and persistent pain may require dose adjustment or reassessment by the healthcare team.

Rationale for Incorrect Answers:

A. “I’ll wait to use the device until it’s absolutely necessary.”: PCA works best when used early and consistently at the onset of pain. Waiting until pain becomes severe makes it harder to control.

B. “I’ll be careful about pushing the button so I don’t get an overdose.”: PCA devices have built-in safety limits (lockout intervals) to prevent overdose. This statement reflects unnecessary fear that may lead to underuse.

D. “I will ask my son to push the dose button when I am sleeping.”: This is unsafe and contraindicated. Only the client should activate the PCA to prevent oversedation or respiratory depression, a practice known as “PCA by proxy” is never appropriate.

Key Takeaways:

• Clients should notify the nurse if PCA is not relieving pain adequately.
• Only the client should press the PCA button to ensure safe use.
• PCA should be used proactively, not delayed until pain becomes severe.

Opioid analgesics are effective for moderate to severe pain but are associated with a variety of adverse effects, particularly involving the central nervous system and gastrointestinal system. Nurses must monitor for these expected reactions to ensure prompt recognition and intervention.

Rationale for Correct Answers:

C. Bradypnea: Opioids depress the respiratory center in the brainstem, which can lead to respiratory depression, especially at higher doses or in opioid-naïve clients.

D. Orthostatic hypotension: Opioids can cause vasodilation and reduced sympathetic tone, leading to a drop in blood pressure when changing positions.

E. Nausea: A common early side effect, nausea occurs due to opioid stimulation of the chemoreceptor trigger zone in the brain.

Rationale for Incorrect Answers:

A. Urinary incontinence: Opioids more commonly cause urinary retention, not incontinence, due to increased sphincter tone and decreased bladder contractility.

B. Diarrhea: Opioids cause constipation, not diarrhea, by slowing gastrointestinal motility through action on opioid receptors in the gut.

Key Takeaways:

• Common adverse effects of opioids include bradypnea, orthostatic hypotension, nausea, constipation, and urinary retention.
• Respiratory depression is the most serious side effect and requires immediate attention.
• Nurses must monitor vital signs, GI status, and bladder function closely during opioid therapy.