Diagnosis of obstructive disease requires several factors depending on the exact disease being diagnosed. However one commonality between them is an FEV1/FVC ratio less than 0.7, i.e. the inability to exhale 70% of their breath within one second. Following is an overview of the main<unk> s. Chronic obstructive pulmonary disease is mainly a combination of chronic bronchitis and emphysema, but maybe more or less overlapping with all conditions. Condition Main site Major changes Causes Symptoms Chronic bronchitis Bronchus Hyperplasia and hypersecretion of mucus glands Tobacco smoking and air pollutants Productive cough Bronchiolitis (subgroup of chronic bronchitis) Bronchiole Inflammatory scarring and bronchiolitis obliterans Tobacco smoking and air pollutants Cough, dyspnea Bronchiectasis Bronchus Dilation and scarring of airways Persistent severe infections Cough, purulent sputum and fever Asthma Bronchus * Smooth muscle hyperplasia * Excessive mucus * Inflammation * Constriction Immunologic or idiopathic Episodic wheezing, cough, and dyspnea Unless else specified in boxes then reference is
Obstructive lung disease
Restrictive lung disease
Reactive airway disease
Interstitial lung disease
Alcoholic lung disease
Alveolar lung disease
Chronic obstructive pulmonary disease
End stage pulmonary disease