Early-initiated High Flow Oxygen Therapy vs Conventional Oxygen Therapy Among Patients With ARDS in the Course of SARS-CoV2 Pneumonia.

Inclusion Criteria: 1. The diagnosis of a current SARS-CoV2 infection (confirmed RT-PCR test or antigen test \[allowed in Poland, with sensitivity ≥90 and specificity ≥97\]); 2. Hospitalization in the Oxygen Sector of the Temporary Hospital in Szczecin; 3. Pneumonia during SARS-CoV2 infection; 4. ARDS (PaO 2 / FiO 2 ratio ≤300); 5. Oxygen flow 8-12 l / min on mask with reservoir and ≤ 60 mmHg paO2 and / or SpO2 \< 92%; 6. TNo current indications for treatment in the ICU; 7. Permisson of the patient. Exclusion Criteria: 1. Probable lack of cooperation with patient; 2. Severe Disease disease, eg generalized neoplastic disease; 3. Concomitant pulmonary diseases (eg, fibrosis lungs); 4. Respiratory acidosis - pH \<7.3 with pCO2\> 50 mmHg; 5. Disturbances of consciousness - GCS \< 12;