The investigators aim to investigate the effects of prone positioning and nitric oxide inhalation in adult patients who is diagnosed with COVID-19 associated acute respiratory distress syndrome by electrical impedance tomography (EIT).~The EIT assessment is performed in patients ventilated in supine position, supine position with NO inhalation for 1 hour, prone position for 1 hour, prone position for 2 hours with NO inhalation for 1 hour, prone position for 3 hours, prone position for 16 hours, re-supine position for 3 hours. Arterial blood gas (ABG) analysis results, ventilator parameters and hemodynamic parameters are also recorded at each time point.
We aims to investigate the effects of prone positioning and nitric oxide inhalation in adult patients who is diagnosed with COVID-19 associated acute respiratory distress syndrome by electrical impedance tomography.