Acute pulmonary edema is a medical emergency that must be diagnosed promptly and resuscitated quickly. 1.Sedation. Subcutaneous or intramuscular injection of morphine 5-10mg or dulcolax 50-100mg to quiet the patient, dilate the peripheral blood vessels, reduce the amount of blood returned to the heart, and reduce respiratory distress. For the elderly, confusion, respiratory depression, shock or combined pulmonary infection is prohibited. 2.Oxygenation. Pressurized high-flow oxygen 6-8 liters per minute, can flow through 25-70% alcohol after inhalation with a nasal tube, pressurization can reduce fluid exudation in the alveoli, alcohol can reduce the surface tension of the foam so that the foam rupture, thereby improving ventilation, can also use silicone defoamer to eliminate foam. 3. Reduce venous reflux. Patients take sitting or lying position with both legs down to reduce venous reflux, if necessary, add tourniquet on all four limbs, ligature three limbs in turn, change one limb every 5 minutes, ligature each limb for 15 minutes on average, relax for 5 minutes to ensure that limb circulation is not affected. 4.Diuretic. Give fast and strong diuretics such as tachyphylaxis 20-40mg or sodium diuretic 25-40mg intravenously with glucose to reduce blood volume and heart load, and pay attention to prevent or correct hypokalemia and hypovolemia when large amounts of diuresis are associated. 5.Vasodilator. Intravenous drip sodium nitroprusside or phentolamine to reduce pulmonary circulation pressure, but should be careful not to cause hypotension, can also be sublingual nitroglycerin or isosorbide dinitrate to reduce pulmonary circulation venous pressure. 6, cardiac drugs. If you have not recently used digitalis drugs, intravenous injection of fast-acting digitalis preparations, such as cedrene, poisonous trichothecene K, etc. For pulmonary edema caused by mitral stenosis, in addition to atrial fibrillation with fast ventricular rate, without cardiac drugs, so as not to increase pulmonary congestion due to increased right ventricular output. 7. Aminophylline. Aminophylline 0.25g can be used for those with bronchospasm. It can reduce bronchospasm, dilute coronary artery and strengthen diuresis by adding 10% glucose solution 20ml and injecting slowly intravenously. Side effects: Premature ventricular contractions and/or ventricular tachycardia. Therefore, it should be used with caution. 8. Corticosteroids. Hydrocortisone 100-200mg or dexamethasone 10mg in glucose solution can also help control pulmonary edema. 9. Treatment of pre-existing diseases and triggering factors. If there is an episode of tachyarrhythmia, it should be controlled quickly.