Abstract
Health care system from the end of 2019 faced a huge challenge worldwide which was the emergence of a new species of coronavirus called severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in Wuhan, China. Within a short time, the pathogen revealed a pandemic nature. On January 30, 2019, the World Health Organization (WHO) announced the outbreak of the COVID-19 pandemic. The greatest threat to human health and life is the damage to the lungs that accompanies a virus infection and the development of Acute Respiratory Distress Syndrome (ARDS). As the epidemic proceeded, a significant amount of the hospital bed facilities was occupied by patients requiring passive oxygen therapy and, in large part, respiratory support using high flow oxygen therapy (HFNC) and continuous positive airway pressure (CPAP) devices. A variety of techniques for applying passive oxygen therapy allow the use of different oxygen flows, with a proportional increase in FiO2 in the breathing mixture.
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