Bronchial asthma clinical features of the general

Bronchial asthma clinical features in general have the following six aspects. (1) bronchial asthma has a long history of recurrent. (2) when the attack chest tightness, dyspnea, shortness of breath, the breath long and short breathing, wheezing accompanied by the sound. (3) as a result of some of the most specific or non-specific factors, in the middle of the night or sleep in a sudden attack. (4) can be an asthma attack at different times in the length of the natural ease, or bronchodilation with drugs such as aminophylline or subcutaneous injection of adrenaline immediately after the intravenous injection to ease. (5), bronchial asthma is characterized by high reactivity of reversible obstructive airway, inhaled or non-specific stimulate specific material, one second forced expiratory volume may decline in more than 15% of the inhaled asthma aerosol After the second rate can be increased by 25%. (6) certain drugs (such as aspirin, indomethacin, sulfonamides, and biological products) and food are caused by the possibility of an asthma attack