Comparisons of Metabolic Load between Adaptive Support Ventilation and Pressure Support Ventilation in Mechanically Ventilated ICU Patients

Table 3

Comparison of ventilatory parameters between different ventilatory modes.

	PS0	ASV PS0		PS8	ASVPS8		PS12	ASVPS12
MV (L/min)	9.1 ± 1	8.9 ± 0.9	0.51	9.3 ± 1.1	8.8 ± 1	0.49	8.7 ± 1	8.6 ± 1	0.51
Spont RR (bpm)	21 ± 1	17 ± 1	<0.001	19 ± 1	16 ± 1	<0.001	18 ± 1	16 ± 1	<0.001
Vt (ml)	442 ± 25	520 ± 23	<0.001	498 ± 30	539 ± 27	<0.001	501 ± 30	529 ± 26	<0.001
Ppeak (cmH2O)	12 ± 1	21 ± 4	<0.001	16 ± 1	21 ± 3	<0.001	20 ± 1	21 ± 4	0.06
MAP	9.1 ± 2	12 ± 1	<0.001	10.8 ± 1	12.1 ± 0.1	<0.001	11.8 ± 1	12.1 ± 1	0.07
P0.1 (cmH2O)	−4.4 ± 0.4	−2.1 ± 0.2	<0.001	−3.3 ± 0.4	−2.0 ± 0.2	<0.001	−2.7 ± 0.3	−1.8 ± 0.2	<0.001

, comparisons between two modes. Vt, tidal volume; RR, respiratory rate; MV, minute ventilation; Ppeak, peak pressure; MAP, mean airway pressure; P0.1, airway occlusion pressure.