The Patient Voices Concern to the Nurse Regarding His Patient-Controlled

The patient voices concern to the nurse regarding his patient-controlled analgesia (PCA) pump.He states that he is afraid of getting an overdose if he pushes the button too many times.The nurse reassures the patient that: (Select all that apply. )

A) there is a time delay (lockout) between patient doses.
B) there is a maximum dose the patient can receive.
C) the patient has a right to be concerned and needs to be careful.
D) the patient could be put on a continuous infusion instead,because it is safer.