pulmonary edema

Pulmonary edema refers to the imbalance of the generation and reflux of tissue fluid in the lung caused by some reason, so that a large amount of tissue fluid can not be absorbed by the pulmonary lymph and pulmonary venous system in a very short time. It seeps in and out of the pulmonary capillaries and accumulates in the alveoli, pulmonary interstitium and small bronchi, resulting in serious impairment of pulmonary ventilation and ventilation function. Clinically, it is characterized by extreme dyspnea, sitting and breathing, cyanosis, sweating, paroxysmal cough accompanied by a large amount of white or pink foam sputum, and the lungs are full of symmetrical rales.