Invasive airway “Intubation” in COVID-19 patients :statistics, causes and recommendations

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Abstract
Background Severe COVID-19 disease could induce acute respiratory distress which is characterized by tachypnea, hypoxia, and dyspnea. Intubation and mechanical ventilation are a strategic treatment of COVID-19 distress or hypoxia. Methods We searched PubMed, Embase, and Scopus databases through April 1, 2021, to identify relevant randomized control trials, observational studies, and case series. Results 24 studies were included in this review. Studies were conducted in the USA, China, Spain, South Korea, Italy, Iran, and Brazil. Most patients were intubated in the intensive care unit. Rapid sequence induction was mostly used for intubation. ROX index might be utilized for the predictor of the necessity of intubation in COVID-19 patients. According to the previous studies the rate of intubation reported 5 to 88%. It was revealed that 1.4 - 44.5% of patients might be extubated. Yet obesity and age (elderly) are the only risk factors of delayed or difficult extubation. Discussion and conclusion Acute respiratory distress in COVID-19 patients could require endotracheal intubation and mechanical ventilation. Severe respiratory distress, loss of consciousness, and hypoxia were the most important reasons for intubation. Also, increased levels of ferritin, d-dimer, and lipase in common with hypoxia are correlated with intubation and ICU admission Mortality following intubation is reported to be 15 to 36%. Awake-prone positioning in comparison to high-flow nasal oxygen therapy did not reduce the risk of intubation and mechanical ventilation. There was no association between intubation timing and mortality of infected patients. noninvasive ventilation may have survival benefits.
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