A nurse is teaching a client how to use patient-controlled analgesia with morphine. Which of the following statements by the client indicates an understanding of the teaching?

A. "The pump will not deliver any medication during the lockout period.": The lockout interval is a safety feature that prevents overdose by ensuring the pump cannot deliver additional doses until a set time has passed. Understanding this helps the client use the PCA safely. B. "I should wait to push the pain button until the pain becomes severe.": PCA is most effective when the client administers medication at the onset of pain rather than waiting for it to become severe, as early administration prevents pain from escalating. C. "My partner can push the pain button for me if I fall asleep.": Only the client should operate the PCA pump to prevent accidental overdose. Allowing someone else to push the button violates safety protocols. D. "I will be asked to describe and rate my pain every 8 hours.": Pain assessment should be frequent, especially in the first 24 hours of PCA use, to adjust therapy and monitor effectiveness. An 8-hour interval may not provide timely information to manage pain effectively.