呼吸功能监测中肺活量正常值及需机械通气指征分别为：
A25～35ml/kg，<15ml/kg
B35～45ml/kg，<15ml/kg
C45～55ml/kg，<15ml/kg
D55～65ml/kg，<15ml/kg
E65～75ml/kg，<15ml/kg
A25～35ml/kg，<15ml/kg
B35～45ml/kg，<15ml/kg
C45～55ml/kg，<15ml/kg
D55～65ml/kg，<15ml/kg
E65～75ml/kg，<15ml/kg