Detail (Long)
<b>Severe:</b> dyspnea VAS ≥5; RR ≥24; HR ≥95; SaO<sub>2</sub> <92% on RA (or pt’s usual O<sub>2</sub> Rx) AND/OR change in SaO<sub>2</sub> >3%; ABG shows new-onset/worsening hypercapnia and acidosis (PaCO<sub>2</sub> >45 mmHg and pH <7.35).