A client has renal failure.

(A) The level of consciousness is not affected by elevated potassium levels. (B) An electrocardiogram (EKG) can tell the nurse whether this client is experiencing any cardiac dysfunction or arrhythmias related to the elevated potassium level. (C) Measurement of the urine output is not a priority nursing action at this time. (D) The client’s serum potassium values for the past several days may provide information about his renal function, but they are not a priority at this time.