Airway pressure morphology and respiratory muscle activity during end-inspiratory occlusions in pressure support ventilation

Table 1 Patient characteristics

Patient characteristics, N = 40
Male, N (%)	25 (62.5)
Age (mean ± SD)	68 ± 13
APACHE II (mean ± SD)	19 ± 7
Admission diagnosis, N (%)
Acute respiratory failure	16 (40)
Septic shock	10 (25)
Multiple trauma	8 (20)
Post cardiac arrest	2 (5)
Others	4 (10)
Respiratory characteristics and ventilator settings
ARDS, N (%)	36 (90)
Days on MV before study, median (IQR)	11 (7–17)
PEEP cmH₂O, mean ± SD	7 ± 2
PO₂/FiO₂ mean ± SD	235 ± 62
Pressure support, cmH₂O, mean ± SD	8 ± 3
Tidal volume, L, mean ± SD	0.48 ± 0.08
Respiratory rate, br/min, mean ± SD	23 ± 7

APACHE II Acute Physiology and Chronic Health Evaluation II score, ARDS acute respiratory distress syndrome, MV mechanical ventilation, PEEP positive end-expiratory pressure, PO₂/FiO₂ partial pressure of arterial oxygen to inspired oxygen fraction ratio, SD standard deviation, IQR interquartile range

ISSN: 1364-8535