Regional distribution of acoustic-based lung vibration as a function of mechanical ventilation mode

Table 2 Parameters among different modes (n = 38)

	VC	PC	PS	p
	Mean ± SD	Mean ± SD	Mean ± SD
Tidal volume (ml)	492 ± 86	479 ± 100	439 ± 137	NS
PIP (mm H₂O)	28 ± 10	25 ± 7	22 ± 8	< 0.05^a
Respiratory rate (breaths per minute)	21 ± 6	22 ± 6	23 ± 9	NS
Breaths per minute above set respiratory rate	8.0 ± 6.3	8.3 ± 6.3	N/A	NS
Oxygen saturation (percentage)	96 ± 4	96 ± 4	96 ± 3	NS
Heart rate (beats per minute)	90 ± 14	94 ± 14	95 ± 13	NS
Blood pressure (mm Hg)	132/74 ± 23/17	132/75 ± 28/18	131/74 ± 28/19	NS

^aPIP differed among all three modes. N/A, non-applicable; NS, not significant; PC, assist pressure control; PIP, peak inspiratory pressure; PS, pressure support; SD, standard deviation; VC, assist volume control.

ISSN: 1364-8535