The diagnosis is usually made on the basis of complaints and presence of characteristic symptoms when you visit pulmonologist. All other methods of investigation are aimed at establishing degree of severity and disease’s etiology.
Spirometery. It helps to assess bronchial obstruction degree, find out variability and reversibility of obstruction, as well as to confirm diagnosis. In case of bronchial asthma forced exhalation after bronchodilator inhalation for 1 second is increased by 12% (200ml) and more. But it should be carried out for several times to obtain more precise information.
Peak flow meter or measurement of peak expiratory activity (PEF) allows you to monitor patient’s condition by comparing figures obtained previously. There is increased PEF after bronchodilator inhalation to 20% and PSV indicates [...]