Shrinking the room for invasive ventilation in hypercapnic respiratory failure

Figures & data

Table 1 Considered parameters in patients responding or not to noninvasive ventilation

	Patients responding to NIV (n = 67)	Patients not responding to NIV (n = 11)
GCS score	9.7 ± 2.9	7.2 ± 1.5
APACHE score	28.9 ± 4.7	33.2 ± 2.9
pO2/FiO2	174.8 ± 44.9	156.5 ± 40.1
pCO2	98.9 ± 14.6	98.2 ± 15.5
pH	7.13 ± 0.1	7.11 ± 0.1
pO2/FiO2 after 1 hour	175.3 ± 70.6	160.8 ± 48.2
pCO2 after 1 hour	75.4 ± 14.8	81.4 ± 25.8
pH after 1 hour	7.25 ± 0.08	7.18 ± 0.12
PO2/FiO2 after 12 hours	198.1 ± 81.6	185.9 ± 94.2
pCO2 after 12 hours	59.6 ± 11.1	58.3 ± 7.6
pH after 12 hours	7.36 ± 0.06	7.37 ± 0.04

Abbreviations: APACHE, Acute Physiology and Chronic Health Evaluation; FiO₂, fraction of inspired oxygen; GCS, Global Coma Scale; NIV, noninvasive ventilation; pCO₂, carbon dioxide partial pressure; pO₂, oxygen partial pressure.