A.0.1%
B.0.2%
C.0.3%
D.0.5%
E.0.6%

A.pH7.30～7.40，PaO₂>90mmHg，PaCO₂>60mmHg
B.pH7.30～7.50，PaO₂>70mmHg，PaCO₂<45mmHg
C.pH7.35～7.45，PaO₂>80mmHg，PaCO₂>50mmHg
D.pH7.50～7.60，PaO₂>70mmHg，PaCO₂>50mmHg
E.pH7.30～7.40，PaO₂>60mmHg，PaCO₂>60mmHg