A nurse is caring for a client who is postoperative and using a PCA pump. For which of the following actions should the nurse intervene?

A. The client is ambulating with the PCA pump: Ambulating with the PCA pump is safe and encouraged, as it promotes mobility and reduces the risk of postoperative complications like pneumonia and deep vein thrombosis. B. The client administers a PCA dose prior to dressing changes: Using PCA before anticipated painful procedures is an appropriate strategy for pain control. It allows the medication to reach peak effect during the activity, minimizing discomfort. C. The client requests their partner administer PCA doses while they sleep: Only the client should press the PCA button. Allowing someone else to activate the pump ("PCA by proxy") increases the risk of oversedation and respiratory depression, making this practice unsafe and requiring nurse intervention. D. The client administers a PCA dose as soon as their pain returns: This is correct use of the PCA system. Administering a dose at the onset of pain helps manage it effectively before it becomes severe, maintaining consistent pain control.