inclusion criteria: - age ≥18 years - admitted to the intensive care unit - positive covid-19 pcr - mechanical ventilation for ≤ 48 hours - pao2/fio2 ≤300

inclusion criteria: - age ≥18 years - admitted to the intensive care unit - positive covid-19 pcr - mechanical ventilation for ≤ 48 hours - pao2/fio2 ≤300