A 54-year-old man on a morphine PCA after total hip arthroplasty has a maximum of 2 mg every 15 minutes and a 30 mg four-hour limit. How should pain control be adjusted if he reports inadequate relief and receives 15 doses in four hours?

A 54-year-old man on a morphine PCA after total hip arthroplasty has a maximum of 2 mg every 15 minutes and a 30 mg four-hour limit. How should pain control be adjusted if he reports inadequate relief and receives 15 doses in four hours?

• A. Discontinue the PCA pump and administer intramuscular morphine
• B. Increase the lockout time to 25 minutes
• C. Change the analgesic from morphine to fentanyl
• D. Increase the dose to 3 mg every 15 minutes as needed up to 40 mg every 4 hours

Answer: (D)

When a patient on a PCA regimen has inadequate pain relief and has already hit the 4-hour dose limit, the sensible move is to adjust the PCA to allow more analgesia while keeping safety in mind. In this case, the patient is receiving 2 mg every 15 minutes with a 30 mg per 4 hours limit and has used 15 doses in four hours, reaching that limit. To improve relief, you should increase the amount given per bolus and raise the 4-hour limit, rather than changing the lockout interval or switching opioids. Increasing the bolus dose to 3 mg and lifting the 4-hour limit to 40 mg per four hours lets the patient receive more morphine within a safer, structured framework. The lockout interval can stay the same, preserving the patient-controlled aspect while expanding how much drug can be delivered in a given time. The other options are less appropriate: stopping PCA and giving IM morphine defeats the purpose of a programmable system; extending the lockout would limit access and worsen analgesia; and switching to fentanyl isn’t required when adjusting the current regimen first. Always monitor closely for sedation and respiratory effects as doses are increased.

When a patient on a PCA regimen has inadequate pain relief and has already hit the 4-hour dose limit, the sensible move is to adjust the PCA to allow more analgesia while keeping safety in mind. In this case, the patient is receiving 2 mg every 15 minutes with a 30 mg per 4 hours limit and has used 15 doses in four hours, reaching that limit. To improve relief, you should increase the amount given per bolus and raise the 4-hour limit, rather than changing the lockout interval or switching opioids. Increasing the bolus dose to 3 mg and lifting the 4-hour limit to 40 mg per four hours lets the patient receive more morphine within a safer, structured framework. The lockout interval can stay the same, preserving the patient-controlled aspect while expanding how much drug can be delivered in a given time. The other options are less appropriate: stopping PCA and giving IM morphine defeats the purpose of a programmable system; extending the lockout would limit access and worsen analgesia; and switching to fentanyl isn’t required when adjusting the current regimen first. Always monitor closely for sedation and respiratory effects as doses are increased.