Disease Exacerbation | |||
---|---|---|---|
Clinical feature | Mild | Moderate | Severe |
Dyspnea | On exertion | On minimal exertion/possibly at rest | At rest |
Oxygen saturation | SaO2 > 96% | SaO2 of 91–96% | SaO2 < 91% |
Radiologic findings | Minimal changes on CXR | Diffuse interstitial changes on CXR | Extensive interstitial changes on CXR |
Other | --- | Fever possible | Tachypnoea at rest, fever, cough |