The Application of Impulse Oscillometry on the Differential Diagnosis of ACOS,Asthma and COPD.
To Assess the Utility of Impulse Oscillometry on a Differential Diagnosis among the Patients with ACOS,asthma and COPD over Age 40.
‣ \- 1.1 ACOS:
⁃ Patient is older than 40 years old.
⁃ There are characteristics of bronchial asthma and COPD.
⁃ There is a history of exposure to risk factors.
⁃ Existence of persistent airflow limitation: After the application of bronchodilators, FEV1/FVC\<0.7, and lung function proved reversible exhalation.
⁃ The existence of reversible airflow limitation: Bronchial Dilation Test positive.
• 2Asthma: 1)Patient is older than 40 years old. 2)History of reversible respiratory symptoms. 3) non-smokers. 4)lung function:At least one time proved that the airflow limitation: Bronchial Dilation Test positive.
• previously diagnosed asthma. 1.3COPD:
⁃ Patient is older than 40 years old.
⁃ Complaints about dyspnea, chronic cough or expectoration.
⁃ There is a history of exposure to risk factors.
⁃ Existence of persistent airflow limitation: After the application of bronchodilators, FEV1/FVC\<0.7.
⁃ The existence of irreversible airflow limitation: Bronchial Dilation Test negative.