A 56 y/o patient has been in the ICU for the past 4 days int…

A 56 y/o patient has been in the ICU for the past 4 days intubated with diagnosis of ARDS and pneumonia.  On appropriated empiric antibiotic treatment.  PaO2:FiO2 ratio is 184, SpO2 ratio is 215, and O2 sat is 91%.   What is the most appropriate classification or category of ARDS for this case/patient?