A Study to Evaluate the Consistency of Oscillometry and Spirometry Test Results in Patients With Confirmed or Suspected Asthma or COPD

Other illness

• Any diseases that influence lung function result such as lung cancer, pneumonia, active pulmonary tuberculosis, pulmonary embolism and interstitial lung disease, etc; history of recent surgery that affect lung function results, including thoracotomy surgery, pneumothorax surgery, thoracic drainage, etc
• Contraindication to spirometry or oscillometry test, or allergic to bronchodilator.

Other

• Participants are excluded from the study if any of the following criteria apply:
• Currently pregnant or breast-feeding women
• Judge by the investigator if the participant is unlikely to comply with study procedures, restrictions, and requirements, will not be enrolled .

• Participants are eligible to be included in the study only if all of the following criteria apply and signed informed content :
• Suspected and confirmed asthma
• Participant must be≥18 years old.
• Present symptom such as wheezing, cough, chest tightness, shortness of breath, but not confirmed-asthma (without evidence of variable airflow restriction) or confirmed-asthma with evidence of variable airflow restriction (such as positive bronchodilation test, positive bronchial challenge test, variability \>10% in twice daily PEF over 2 weeks, et al) Suspected and confirmed COPD
  • 1 Participant must be ≥40 years old. 2 Present symptom such as chronic cough, sputum production, dyspnoea, but not confirmed-COPD (without evidence of persistent airflow restriction) or confirmed- COPD with evidence of persistent airflow restriction (post-bronchodilator FEV1/FVC\<0.7)