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COPD. Review Oct. 16, 2014 Cathy Vakil. Key messages. 1) Suspect COPD - prolonged or recurrent cough, dyspnea, or decreased exercise tolerance, smoking history 2) PFTs for confirmation and to document disease progression 3) Encourage smoking cessation 4) Vaccinations. 5) Meds
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COPD Review Oct. 16, 2014 Cathy Vakil
Key messages 1) Suspect COPD - prolonged or recurrent cough, dyspnea, or decreased exercise tolerance, smoking history 2) PFTs for confirmation and to document disease progression 3) Encourage smoking cessation 4) Vaccinations
5) Meds 6) Referral – respirologist, pulm. rehab. 7) Rule out co-morbidities (e.g. MI, congestive heart failure, systemic infections, anemia). 8) If end-stage COPD, discuss, document, and periodically re-evaluate wishes about aggressive treatment interventions.
Global Initiative for Chronic Obstructive Lung Disease - GOLD
COPD • Treatable • Preventable • Underdiagnosed
Family Physicians’ role • Early detection through targeted screening and prevention by smoking cessation counselling • Optimize symptom control through appropriate pharmacological and non-pharmacological therapy • Prevention; management of acute exacerbations
COPD • Tobacco smoke/air pollution – *chronic lung inflammation* (persists after removal of toxin) • Air trapping, luminal plugs, airflow limitation • Mucous production (“chronic bronchitis”) • Tissue destruction, small airway fibrosis (emphysema)
Leads to: • hypoxia • Pulmonary hypertension, RVH • Inflammatory mediators - cachexia, worsening of heart disease, DM, osteoporosis, anemia
Types of COPD • Emphysema • Chronic bronchitis • Asthma-COPD Overlap Syndrome (ACOS)
Emphysema • Toxin – lung inflammation – narrowing of small airways and destruction of lung parenchyma – reduction of elastic recoil – reduction of ability of airways to remain open during expiration – air trapping • Destruction of gas-exchanging surfaces of the lung (alveoli) • hypoxia
Chronic Bronchitis • Presence of cough and sputum production for at least 3 months in 2 consecutive years • Independent disease entity, can occur in normal spirometry • Usually present in COPD along with emphysema
ACOS • Features of both • History of asthma, then develop COPD • Chronic inflammation of asthma untreated – COPD • Usually over 40 years old • More rapid decline, higher mortality than either alone • Specific treatment limitations
Causes of COPD • Total burden of inhaled particles • Smoking, second-hand smoke • Air pollution (indoor, outdoor) • Occupational – dust (silica, grain), chemicals, fumes, cadmium, agriculture • Cumulative exposure over decades
Other factors • Alpha 1-antritrypsin deficiency • Aging, low SES, co-morbidities • Childhood infections, low birth weight • Family history of COPD • Gene/environment interaction • Significant morbidity, mortality, social, economic burden