Oxygen saturation less than or equal to 88% or a PaO2 less than or equal to 55 mm Hg (COPD)
oxygen saturation less than or equal to 88% or a pao2 less than or equal to 55 mm hg (copd)
Oxygen saturation less than or equal to 88% or a PaO2 less than or equal to 55 mm Hg (COPD)
oxygen saturation less than or equal to 88% or a pao2 less than or equal to 55 mm hg (copd)