Prediction of extubation outcome: a randomised, controlled trial with automatic tube compensation vs. pressure support ventilation

Table 2 Respiratory and haemodynamic characteristics by group at start of spontaneous breathing trial

Characteristic	ATC (n = 87)	PSV (n = 93)	p value
Heart rate, beats/minute	91.5 ± 1.9	84.2 ± 1.9	0.85
MAP, mmHg	93.2 ± 1.8	91.9 ± 1.8	0.63
PaCO₂, mmHg	43.5 ± 1.3	42.8 ± 1.2	0.60
PaO₂/FiO₂ ratio	269.8 ± 10.3	271.7 ± 10.8	0.79
Respiratory rate, breaths/minute	20.5 ± 0.7	20.5 ± 0.7	0.81
Tidal volume, ml	0.48 ± 0.1	0.47 ± 0.1	0.78
Minute ventilation, L/minute	8.7 ± 0.5	9.2 ± 0.4	0.40
Fluid balance 24 hours before SBT, ml	-48. 9 ± 1322.0	36.2 ± 1282.4	0.67

Data are presented as mean ± standard deviation.
ATC = automatic tube compensation; f/VT = frequency to tidal volume ratio; MAP = mean arterial blood pressure; PaCO₂ = partial carbon dioxide tension in arterial blood; PaO₂/FiO₂ = ratio of partial oxygen tension in arterial blood to fraction of inspired oxygen; PSV = pressure support ventilation; SBT = spontaneous breathing trial

ISSN: 1364-8535