Celli presents a description of what COPD and asthma is and how important spirometry is in diagnosing. He states that airflow limitation is the cause for COPD (chronic obstructive pulmonary disease) and that asthma is described as being an inflammatory disease with air flow limitation. Unlike COPD though, the airflow limitation in asthma can be reversed through treatment. Celia describes spirometry as being important due to the fact it diagnoses and tracks COPD and asthma. Spirometry has the ability to detect these conditions early which allows the conditions to not worsen. This is a valid source because it showed me how what lung conditions exist. It also described how important spirometry is to diagnose these existing conditions. This source
