Evaluation of epidemiological characteristics, treatments, and prognosis of patients with COVID-19 hospitalized in the Intensive Care Unit

Introduction: Intensive care facilities may play an important role in reducing corona mortality. This study aimed to assess the epidemiological features, treatments, and prognosis of corona patients that admitted to the Intensive Care Unit (ICU) of Baqiyatallah Hospital. Methods: All patients with a corona that admitted to the ICU of Baqiyatallah Hospital from March 5 to May 20, 2020, were included. The epidemiological characteristics, pharmacological, non-pharmacological, and supportive therapies and prognosis were assessed. Underlying diseases, smoking, and severity of lung involvement based on CT scan findings (mild, moderate, severe) and length of hospital stay in the ICU were recorded in a questionnaire. Non-invasive ventilation (NIV) or tracheal intubation, ventilator ventilation, and duration of endotracheal intubation, if needed, were recorded in the questionnaire. Meanwhile, whether tracheostomy was performed, the time of the procedure, and its duration were also recorded. Results: Overall, 82 patients were included in the study that 68 (82.9%) of them were males. The mean age was 57.96 +/- 14.08 years. The mortality rate was 53 cases (64.6%). There were 57 subjects (73.1%) at a severe lung involvement and 21 subjects (26.9%) at a moderate lung involvement. There was a significant relationship between severity of lung involvement and mortality (Odds ratio= 14.3, P<0.001). There was a significant relationship between mortality and Armadile use (Odds ratio= 2.9, P=0.04). There was a significant relationship between mortality and tracheal intubation (Odds ratio= 27.2, P<0.001). There was no significant difference between mortality and discharge of patients regarding the intubation period (P=0.26). There was not a significant relationship between tracheostomy, NIV, and mortality status in the patients (P=0.14 and 0.33 respectively). Also, there was no significant difference between mortality and discharge of patients regarding tracheostomy and NIV period (P=0.51 and 0.17). There was no significant difference in age between severe and moderate lung involvement cases (P=0.63). There was a significant difference in the duration of ICU hospitalization between severe and moderate lung involvement cases (P=0.004). Conclusion: The results showed none of the factors of age, sex, underlying diseases other than hypertension, pharmacological methods other than Armadile, and non-pharmacological methods such as hemoperfusion, plasmapheresis, IVIG, hyperimmune plasma injection, and stem cell as well as Ozone therapy does not affect corona patient's mortality. Only the severity of lung involvement leading to endotracheal intubation and mechanical ventilation is related to patients' mortality