In which stage of COPD is the forced expiratory volume (FEV1)
< 30%?
a) III
Stage III patients demonstrate FEV1 < 30% with respiratory failure or
clinical signs of right heart failure
b) II
Stage II patients demonstrate FEV1 between > 30% and 80%
c) I
Stage I is mild COPD with FEV1 < 70%.
d) O
Stage O is characterized by normal spirometry
< 30%?
a) III
Stage III patients demonstrate FEV1 < 30% with respiratory failure or
clinical signs of right heart failure
b) II
Stage II patients demonstrate FEV1 between > 30% and 80%
c) I
Stage I is mild COPD with FEV1 < 70%.
d) O
Stage O is characterized by normal spirometry