Overview
Chronic Obstructive Pulmonary Disease (COPD) is a chronic, progressive lung disease characterized by persistent airflow limitation that is not fully reversible, leading to difficulty in breathing. It is most commonly caused by long-term exposure to harmful particles or gases, especially cigarette smoke, and includes conditions such as chronic bronchitis and emphysema.
Causes & Risk Factors
Primary Causes
- Cigarette smoking (most significant cause)
- Long-term exposure to air pollutants (outdoor and indoor)
- Occupational exposure to dust, chemicals, and fumes
- Biomass fuel exposure (wood, coal, dung used for cooking/heating in poorly ventilated areas)
Risk Factors
- Second-hand smoke exposure
- Genetic predisposition, especially alpha-1 antitrypsin deficiency
- Advancing age (typically >40 years)
- History of recurrent respiratory infections in childhood
- Asthma and airway hyperreactivity
- Low socioeconomic status
Reducing exposure to these risk factors, especially quitting smoking, is the most effective way to prevent COPD or slow its progression.
Symptoms
Common Symptoms
- Chronic cough (persistent, dry or productive)
- Sputum (mucus) production
- Shortness of breath initially with exertion
- Wheezing
- Chest tightness
Progressive / Advanced Symptoms
- Breathlessness during routine daily activities or at rest
- Frequent respiratory infections
- Fatigue and decreased exercise tolerance
- Unintentional weight loss (advanced stages)
- Swelling of ankles/feet in severe disease
Symptoms of Exacerbation (Flare-ups)
- Sudden worsening of shortness of breath
- Increased cough and sputum volume
- Change in sputum color (infection indicator)
- Fever or malaise
Diagnosis
Clinical Evaluation
- Detailed medical history (smoking, occupational exposure, symptoms)
- Physical examination (wheezing, prolonged expiration, decreased breath sounds)
Confirmatory Test
- Spirometry (Gold standard)
- Diagnosis confirmed when post-bronchodilator FEV1/FVC < 0.70
Additional Investigations
- Chest X-ray (exclude infections, malignancy)
- CT scan of chest (emphysema, complications)
- Arterial blood gas (ABG) analysis
- Pulse oximetry (oxygen saturation)
- Alpha-1 antitrypsin testing (selected patients)
Severity Assessment
Based on FEV₁ % predicted, symptom burden, and exacerbation history using GOLD criteria.
Treatment
1. Lifestyle & Preventive Measures
- Smoking cessation
- Avoid dust, fumes, and pollutants
- Vaccinations (influenza and pneumococcal)
- Regular physical activity
2. Pharmacological Treatment
- Short-acting bronchodilators (SABA/SAMA) for relief
- Long-acting bronchodilators (LABA/LAMA) for maintenance
- Inhaled corticosteroids (ICS) in severe or frequent exacerbations
3. Combination Therapy
- LABA + LAMA
- LABA + ICS
- Triple therapy (LABA + LAMA + ICS) in advanced cases
4. Non-Pharmacological Management
- Pulmonary rehabilitation
- Nutritional support
- Pursed-lip breathing techniques
5. Oxygen Therapy
Indicated in chronic hypoxia; improves survival in severe COPD.
6. Management of Exacerbations
- Short-acting bronchodilators
- Systemic corticosteroids
- Antibiotics if infection suspected
- Hospitalization in severe cases
7. Surgical Options
- Lung volume reduction surgery
- Bullectomy (selected patients)
Treatment should be individualized based on symptom severity, exacerbation history, and GOLD classification with regular follow-up.
When to Seek Medical Advice
Routine Medical Review
- Increasing shortness of breath
- Persistent or worsening cough
- Increased sputum production
- Reduced physical activity tolerance
- Frequent inhaler use
Urgent Medical Care
- Severe breathing difficulty
- Rapid worsening of breathlessness
- Inability to speak full sentences
- Bluish lips or fingertips (cyanosis)
- High fever with respiratory symptoms
- Confusion or drowsiness
Early intervention during exacerbations can prevent complications, reduce hospital admission, and improve long-term outcomes in COPD.
