Table 1.

Lung volumes measured by multi-slice computer tomography

	Pre-recruitment maneuver	Post-recruitment maneuver	P-value	fractional change (%)
Expiration
VHYP (ml)	60 ± 21	67 ± 28	0.025	11.2 ± 10
VNORM (ml)	577 ± 142	649 ± 206	0.036	11.0 ± 12
VPOOR (ml)	406 ± 83	493 ± 112	0.017	21.7 ± 18
VNON (ml)	357 ± 53	275 ± 72	0.012	-23.3 ± 15
VTOT (ml)	1401 ± 136	1483 ± 175	0.025	5.8 ± 5
VGAS (ml)	629 ± 83	711 ± 133	0.012	13.1 ± 10
VTISS (ml)	838 ± 62	832 ± 60	0.263	-
Inspiration
VHYP (ml)	109 ± 38	115 ± 42	0.093	-
VNORM (ml)	789 ± 140	889 ± 197	0.012	12.4 ± 12
VPOOR (ml)	397 ± 94	478 ± 124	0.017	20.9 ± 18
VNON (ml)	295 ± 54	232 ± 75	0.012	-22.3 ± 16
VTOT (ml)	1589 ± 139	1713 ± 150	0.012	7.9 ± 5
VGAS (ml)	838 ± 84	939 ± 128	0.012	12.5 ± 8
VTISS (ml)	819 ± 56	838 ± 64	0.263	-

Data are reported as mean ± SD. V_GAS, total lung gas volume; V_HYP, hyperinflated lung volume; V_NON, non-aereated lung volume; V_NORM, normally aereated lung volume; V_POOR, poorly aerated lung volume; V_TISS, total lung tissue volume; V_TOT, total lung volume.