In patients with chronic kidney failure, the primary indicator to observe is obviously kidney function. It is essential to regularly monitor the patient's blood creatinine and urea nitrogen levels, which are generally required to be tested every 1 to 3 months when chronic kidney failure is stable. Additionally, urine output should be monitored. If there is a decrease in urine output and swelling occurs, it may indicate that the patient's kidney function is continuously deteriorating. A complete blood count should also be checked to observe changes in the patient's anemia status. Chronic kidney failure often causes hypertension, so blood pressure monitoring is also necessary for these patients. Electrolyte monitoring is important as kidney failure can lead to disturbances in calcium and phosphorus metabolism and subsequent secondary hyperparathyroidism. Therefore, the levels of calcium, phosphorus, and parathyroid hormone also need to be tested.