Chapter three Chronic Obstructive Pulmonary Diseases (COPD) Chronic bronchitis Obstructive Pulmonary Emphysema
Chapter three • Chronic Obstructive Pulmonary Diseases (COPD) • Chronic Bronchitis • Obstructive Pulmonary Emphysema
Definition of copd Including chronic bronchitis and pulmonary emphysema Chronic airflow limitation progressing slowly Partial reversibility Abnormal inflammatory response of the lungs to noxious particles or gases
Definition of COPD • Including chronic bronchitis and pulmonary emphysema • Chronic airflow limitation • progressing slowly • Partial reversibility • Abnormal inflammatory response of the lungs to noxious particles or gases
Classification of CoPd by severity Stage o(at risk) Chronic cough and sputum production Contact with harmful factors FEV1/FVC>70% Stage l(mild) FEV1/FVC <70% FEV] c 80 predicted uSually, but not always, chronic cough and
Classification of COPD by Severity • Stage 0 ( at risk) – Chronic cough and sputum production – Contact with harmful factors – FEV1/FVC > 70% • Stage I( mild) – FEV1/FVC < 70% – FEV1 80 % predicted – usually, but not always, chronic cough and sputum production
Classification of copd by severity Stage l( moderate) lA:FEⅥ/FVC<70% 50%8 FEV1<80% predicted lR: FEV1/FVC <70% 30%8 FEV1 50% predicted With or without symptom
Classification of COPD by Severity • Stage II( moderate) – IIA : FEV1/FVC < 70% 50% FEV1 < 80% predicted – IIB : FEV1/FVC < 70% 30% FEV1 < 50% predicted With or without symptom
Classification of copd by severity Stage l( Severe FEVI/FVC<70% FEV1% predicted or with respiratory failure or cardiac failure
Classification of COPD by Severity • Stage III( Severe) – FEV1/FVC < 70% – FEV1 30 % predicted or with respiratory failure or cardiac failure