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多项选择题
A.轻度为吸入支气管扩张剂后,FEV1/FVC<70%,FEV1≥80%
B.中度为吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1≤80%
C.重度为吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1<80%
D.极重度为吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%,伴有慢性呼吸衰竭
单项选择题
A.吸入支气管扩张剂后,FEV1/FVC<50%,30%≤FEV1<50%
B.吸入支气管扩张剂后,FEV1/FVC<70%,30%≤FEV1<50%
C.吸入支气管扩张剂后,FEV1/FVC<50%,50%≤FEV1<80%
D.吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1<80%
多项选择题
A.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%
B.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<50%
C.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%且伴慢性呼吸衰竭
D.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<50%且伴慢性呼吸衰竭
单项选择题
A.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1≥80%
B.吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1<80%
C.吸入支气管扩张剂后,FEV1/FVC<70%,30%≤FEV1<50%
D.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%,或FEV1<50%且伴有慢性呼吸衰竭
单项选择题
A.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1≥80%
B.吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1<80%
C.吸入支气管扩张剂后,FEV1/FVC<70%,30%≤FEV1<50%
D.吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%,或FEV1<50%且伴有慢性呼吸衰竭