Pathological changes
Chronic inflammation
Structural change
Physiological abnormalities
Mucus hyper secretion Ciliary dysfunction Airflow limitation with hyperinflation Impaired gas exchange Pulmonary hypertension
Risk factors
Smoking Indoor air pollution Occupational toxins Outdoor air pollution Genetic factors (alpha 1anti trypsin deficiency) Infections Socio-economic factors Asthma and airway hyperactivity
history
Chronic progressive dyspnoea Chronic cough Regular sputum production wheezing and chest tightness Fatigue, weight loss?
Examination findings
Hyperinflated chest Wheeze/quiet breath sounds Purse lip breathing Use of accessory muscles Peripheral oedema Cyanosis Raised JVP Cachexia
Investigations for suspected COPD / differentials
CXR
FBC
BMI
Spirometry
Additional: peak flow, alpha 1 anti trypsin, pulse oximetry, CT thorax, ECG, echo, blood gas, sputum culture
Treatment
saba or sama
Long acting muscarinic agonist. IF ineffective LABA/LAMA
-ICS if frequent exacerbations
-Smoking cessations