Noninvasive Ventilation Weaning in Acute Hypercapnic Respiratory Failure due to COPD Exacerbation: A Real-Life Observational Study

Figure 3

Arterial blood gases at different stages both during NIV and after NIV discontinuation. ABG, arterial blood gas; IQR, interquartile range 25th–75th percentile; PaO₂, arterial oxygen partial pressure (mmHg); PaCO₂, arterial carbon dioxide partial pressure (mmHg); P/F = PaO2/FiO₂, arterial oxygen partial pressure to fraction of inspired oxygen ratio; NIV, noninvasive ventilation. (a) ABG: pO₂, (b) ABG: pH, (c) ABG: pCO₂, and (d) ABG: P/F.

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