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Chronic Bronchitis: Clinical Features

Lungs showing bronchitis mucus

Thick sputum.
Irritable cough.
Dyspnoea (breathlessness).
Audible crepitation's (crackling sound heard through a stethoscope).
Forced Expiratory Volume in one second (FEV1) is reduced (FEV1 shows the amount of air a person can forcefully exhale in one second of their forced vital capacity (FVC).
Barrel shaped chest.