A nurse is providing preoperative teaching to a client about the administration of morphine via a PCA pump. Which of the following statements by the client indicates an understanding of the teaching?

PCA (patient-controlled analgesia) pumps have a lockout interval and dose limit that prevent overdose — only a limited, programmed amount of medication is delivered per dose and per hour. PCA pumps are safe because only the client can press the button. If the client is too sedated to press the button, they should not receive more medication — this is the built-in safety mechanism. Partners, family members, or nurses should never press the button for the client (proxy dosing), as this bypasses the safety mechanism.