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Fig. 3 | BMC Anesthesiology

Fig. 3

From: Breathing pattern, accessory respiratory muscles work, and gas exchange evaluation for prediction of NIV failure in moderate-to-severe COVID-19-associated ARDS after deterioration of respiratory failure outside ICU: the COVID-NIV observational study

Fig. 3

The gas exchange and respiratory pattern in NIV success and NIV failure groups during 14 days. A PaO2/FiO2. B Respiratory Rate. C ROX index. D End-tidal carbon dioxide. E Alveolar dead space to tidal volume ratio. F Patrick score. Data on NIV success (green) and NIV failure (blue) are presented as medians and 95% confidence intervals (A-E), boxplots (F). The x-axis represents days after initiation of non-invasive ventilation. Abbreviations: PaO2- partial pressure of oxygen in arterial blood; FiO2—inspiratory oxygen fraction; VDalv—alveolar dead space; VT- tidal volume; PetCO2—end-tidal partial pressure of carbon dioxide. * p-value < 0.05, comparison between NIV success and NIV failure groups (Mann-Whitney U test). ** p-value < 0.01, comparison between NIV success and NIV failure groups (Mann-Whitney U test). § p-value < 0.001, comparison between NIV success and NIV failure groups (Mann-Whitney U test)

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BMC Anesthesiology

ISSN: 1471-2253

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