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Table 2 The number of patients who are reassigned to a new grade of acute respiratory distress syndrome (ARDS, Mild: 200–300 mmHg, Moderate: 100–200 mmHg, and Severe: < 100 mmHg) during a change in ventilatory strategy

From: Limitations of the ARDS criteria during high-flow oxygen or non-invasive ventilation: evidence from critically ill COVID-19 patients

1st Strategy

2nd Strategy

HFNC

NIV

MV

A: Decreased ARDS grade

HFNC

–

42 (55%)

25 (74%)

NIV

1 (2%)

–

10 (28%)

MV

1 (3%)

1 (8%)

–

B: Increased ARDS grade

HFNC

–

1 (1%)

1 (3%)

NIV

20 (34%)

–

5 (14%)

MV

14 (40%)

1 (8%)

–

  1. The changes were from the first strategy to the second strategy that were either of high-flow nasal cannula (HFNC), non-invasive ventilation (NIV) or invasive mechanical ventilation (MV). Patients who decrease their ARDS grade, that improve in oxygenation are reported in A, and those who increase ARDS grade, or show worse oxygenation in B
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Critical Care

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