The normal value of blood potassium is 3.5-5.5 mmol/L. Hyperkalemia is considered when the blood potassium concentration is >5.5 mmol/L. Hyperkalemia affects neuromuscular excitability and also the electrophysiological stability of the myocardium, and requires active rescue treatment. Intravenous sodium bicarbonate injection can effectively reduce blood potassium because sodium bicarbonate is an alkaline solution. Intravenous sodium bicarbonate injection will lead to an increase in blood pH, and intracellular hydrogen ions will enter the extracellular area more often, and in order to maintain the balance of anions and cations, extracellular potassium ions will also enter the intracellular area, resulting in an increase in hydrogen-potassium exchange, which leads to the transfer of potassium ions to the intracellular area, effectively reducing blood potassium. In addition to intravenous sodium bicarbonate injection, the treatment of hyperkalemia also includes the following points: 1. Intravenous glucose injection with insulin in a certain proportion can also effectively promote the entry of potassium ions into the cells and lower the blood potassium. 2. Intravenous calcium gluconate injection can counteract the toxic effect of potassium ions on the heart muscle. 3. Under the condition of ensuring fluid intake and electrolyte balance, appropriate The application of potassium excreting diuretics can also help to reduce blood potassium.