COPD. Alex Gibbins. Contents. Numbers Assessment Management – NICE guideline CG101 June 2010 When to refer. Numbers. 835000 in UK have COPD Up to 2 million un-diagnosed 2 nd commonest cause of emergency hospital admission 30,000 deaths per year 60% of NHS costs due to unscheduled care.
Degree of airflow obstruction (FEV1/ FVC ratio <0.7):
Stage 1 — mild: FEV1 80% of predicted value or higher (symptoms must be present).
Stage 2 — moderate: FEV1 50–79% of predicted value.
Stage 3 — severe: FEV1 30–49% of predicted value.
Stage 4 — very severe: FEV1 less than 30% of predicted value.
Oxygen saturation less than or equal to 92% breathing air.