Effect of mechanical ventilation on intra-abdominal pressure in critically ill patients without other risk factors for abdominal hypertension: an observational multicenter epidemiological study

Annals of Intensive Care

Table 4 Ventilatory parameters according to IAH definition

Parameter	Total	IAH	Non-IAH	p value^a
RR (breath/min)	17.6 ± 4.6	18.7 ± 3.2	17.4 ± 4.7	0.402
Vmin (l/min)	9.4 ± 2.8	10.1 ± 2.0	9.3 ± 2.8	0.243
Vt (ml/kg)	8.2 ± 2.3	8.2 ± 3.3	8.2 ± 2.2	0.540
Ppeak (cmH₂O)	24.1 ± 11.7	20.7 ± 10.0	24.5 ± 12.0	0.370
Pplateau (cmH₂O)	13.1 ± 8.8	12.5 ± 8.3	13.2 ± 8.9	0.858
PEEP (cmH₂O)	2.1 ± 2.5	3.7 ± 2.5	1.9 ± 2.4	0.080
SC (ml/cmH₂O)	79.4 ± 73.7	110.4 ± 84.6	75.1 ± 53.1	0.325
DC (ml/cmH₂O)	32 ± 21.6	41.3 ± 24.4	30.7 ± 21.2	0.282

^aMann-Whitney U test. IAH, intra-abdominal hypertension; RR, respiratory rate; Vmin, minute volume; Vt, tidal volume; Ppeak, peak pressure; Pplateau, plateau pressure; PEEP, positive end-expiratory pressure; SC, static compliance; DC, dynamic compliance.