What are the types of pulmonary dyspnea?

Dyspnea caused by respiratory tract diseases, collectively referred to as pulmonary dyspnea, can be divided into the following three types: first, inspiratory dyspnea, caused by upper respiratory tract stenosis, can be seen in laryngitis, throat foreign body, pharyngeal wall abscess, pharynx diphtheria and throat cancer. Second, expiratory dyspnea. Due to lung tissue lesions, such as elastic weakening or small bronchospasm, stenosis caused, more common in acute and chronic bronchitis, bronchial asthma, emphysema and so on. Third, mixed dyspnea, caused by the reduction of effective lung breathing area, is more common in emphysema, lung infection, pleural effusion, spontaneous pneumothorax, lobar pneumonia, bronchopneumonia, atelectasis and acute pulmonary edema.