The amount of urine required for potassium supplementation is usually greater than 700 ml per day and 30 ml per hour, when it is safe. Hypokalemia has a serious impact on the body, but hyperkalemia also has a bad impact on the heart and can lead to cardiac arrest, so it is important to monitor urine output and kidney function. Potassium enters the cells very slowly, and it takes about 15 hours or more for the potassium to balance inside and outside the cells. It is important to monitor the process of potassium infusion closely to prevent transient hyperkalemia, and to correct alkalosis and hypomagnesemia in refractory hyperkalemia. In addition, if hypocalcemia and hand and foot convulsions occur after potassium infusion, calcium supplements should be given.