Clinical and laboratory markers of severity of the new coronavirus infection (COVID - 19)

Abstract

The aim of the research. To study clinical and laboratory features of the new coronavirus infection (COVID-19) in order to develop a model that would allow, taking the publicly available research methods into account, to carry out early diagnosis of severe community-acquired pneumonia against the background of the new coronavirus infection. Material and methods. A total of 82 COVID-19 patients who complied with inclusion and exclusion criteria were enrolled. Depending on the clinical severity, three study groups were formed: group 1 included 13 patients with uncomplicated COVID-19, group 2 consisted of 39 patients with non-severe forms of pneumonia that developed against COVID-19 and group 3 was comprised of 30 patients with COVID-19 complicated by severe pneumonia. The groups were comparable in age and gender. All patients underwent general clinical examination, laboratory tests, including general and biochemical blood analysis, as well as chest computed tomography. Results. The clinical picture in COVID-19 patients differed depending on the disease severity. Coughing and shortness of breath were more often observed in patients with severe pneumonia; sore throat, on the contrary, was more often noted in patients with uncomplicated COVID-19. On admission to the inpatient facility, patients with severe pneumonia had higher body temperature and respiratory rate, with simultaneous decrease in blood oxygen saturation. One half of the patients with severe pneumonia had hypertensive disease in medical history, and one third had ischaemic heart disease. As a rule, uncomplicated COVID-19 patients did not have ischaemic heart disease. It was found through laboratory analysis of blood that groups of patients significantly differed in the levels of neutrophils, lymphocytes, monocytes, basophils and eosinophils. Conclusion. The use of such clinical and laboratory data as acute respiratory failure, fever, the levels of neutrophils, monocytes, lymphocytes, eosinophils and basophils makes it possible to identify patients with more severe pneumonia against the background of COVID-19 even before chest computed tomography.