A nurse is caring for a client on a medical-surgical unit who has heart failure. Complete the following sentence by using the lists of options. The nurse should assess the client'sdropdown followed by the client'sdropdown.

Urinary output: Furosemide is a loop diuretic that increases urine production to reduce fluid overload in heart failure. Monitoring urinary output helps determine the effectiveness of the diuretic and ensures the client is responding appropriately to therapy. Potassium level: Loop diuretics increase the excretion of potassium, which can lead to hypokalemia. Assessing potassium after monitoring urine output allows the nurse to detect and prevent potentially dangerous electrolyte imbalances that could lead to arrhythmias or muscle weakness. Peripheral edema: While peripheral edema is important to monitor, assessing urinary output provides a more immediate and direct measure of the diuretic’s effectiveness in mobilizing fluid. Edema changes lag behind diuretic therapy. Blood pressure: Although blood pressure can be affected by diuretics, it does not directly indicate diuretic effectiveness or potassium loss. Monitoring BP is important but secondary to urinary output and electrolytes in this context. Lung sounds: Lung sounds reflect pulmonary fluid status, which is relevant in heart failure, but acute changes in lung sounds occur more slowly than changes in urine output. Assessing lung sounds should follow monitoring immediate effects like urine output. Creatinine level: Creatinine indicates kidney function, which is important for diuretic safety, but potassium level is more immediately critical to assess for electrolyte disturbances after increased diuresis.