Since the first case of coronavirus disease 2019 (COVID-19) was announced in China in January2020, the disease has increased rapidly, becoming a pandemic, with 39,171,178 infectedand 1,100,855 deaths worldwide as of October 2020. In Korea, 25,199 infections and 444 deathshave been reported since the first case in 2020 [1]. As the global pandemic persisted, problemssuch as limited medical resources, intensive care unit (ICU) equipment, and medicalstaff shortages gradually intensified. Accordingly, more efficient operation and securing oflimited medical resources have become essential. In particular, if medical shortages are realized,it may be difficult to achieve timely hospitalization and adequate intensive care such asmechanical ventilation, especially for severe cases of COVID-19.
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