The evaluation of chronic bronchitis begins with a medical history and physical examination.

Physical findings in those with chronic bronchitis may include:

• Cyanosis
• Low blood oxygen levels
• Rapid respiratory rate
• Wheezing
• Signs of severe difficulty breathing
• Rib retractions
• Nasal flaring
• Use of accessory muscles

The diagnosis of chronic bronchitis is usually confirmed through testing.

Tests that may be used to evaluate chronic bronchitis include:

• Chest x-ray
• Arterial blood gas
• Pulse oximetry
• Pulmonary function tests:
• Measuring the response to bronchodilator medications
• Peak flow measurement

Less commonly performed tests that may be used to evaluate chronic bronchitis include:

• Bronchoscopy
• Allergic skin testing (in the case of allergic asthma)
• CT scanning of the chest