Firstline - Clinical Decisions

Severity Scale

0 = Room air
1 = Supplemental O₂ via NC up to 6L
2 = Supplemental O₂ and ≥1 of:
- Dyspnea or staccato speech at rest or after minimal activity
- RR>22 on 6L
- PaO₂<65 mmHg with 6L
- Worsening infiltrates on imaging (CT preferred)
3 = HFNC, CPAP, or NIV
4 = Intubated with minimal support PaO₂/FiO₂, or using PS
5 = Intubated, PaO₂/FiO₂ > 150 mmHg
6 = Intubated, PaO₂/FiO₂ < 150 mmHg
7 = Intubated, PaO₂/FiO₂ < 150 mmHg AND vasopressor support
8 = Intubated in prone position or ECMO

Hospitalized for Reasons Other Than COVID-19

Severity = 0

Severity = 1

Severity = 2

Severity = 3

Severity ≥ 4