Prone Positioning vs. Prone Positioning and NO Inhalation in COVID-19 ARDS.

Prone Positioning Versus Prone Positioning and NO Inhalation in COVID-19 Associated Acute Respiratory Distress Syndrome.

The investigators aim to investigate the effects of prone positioning and prone positioning with NO inhalation for COVID-19 patients with ARDS.

The investigators aim to investigate the effects of prone positioning and prone positioning with NO inhalation for COVID-19 patients with ARDS. Patients with COVID-19-associated ARDS were ventilated in prone position with or without NO inhalation, the arterial blood gas (ABG) tests were performed at 16 hours after prone positioning.

Inclusion Criteria:

• Adult patients with COVID-19 associated ARDS

Exclusion Criteria:

• patients who have contraindication for prone positioning, including pregnant, post-abdomen surgery within a week; hypercapnic respiratory failure