Question: If a person have a near fresh water (lake water) drowning and Spo2 <90 % severe SOB, and by auscultating lungs I hear Crackles all over the places mainly on lower lobes tachypnea and normotensive. As per CPAP protocol: indication severe respiratory distress and signs and/ or symptoms of Acute pulmonary edema or COPD is the indication, and patient is above 18years and no contraindication met, can I apply CPAP on this patient ? If not please tell me why and I know Nitro is not applicable in this case because this is not a cariogenic pulmonary edema.