Table 4.

Respiratory parameters

	Group 1:VDLT	Group 2:cDLT	P
Tidal volume (ml/kg) Mean±SE
TLV 1	8.07±0.14	8.44±0.12	0.06
OLV	6.66±0.13	6.70±0.12	0.82
TLV 2	7.99±0.16	8.19±0.15	0.43
PEEP (cm H2 O) Mean±SE
TLV 1	5.70±1.48	5.27±0.17	0.21
OLV	7.03±1.29	6.25±0.24	0.01
TLV 2	6.68±1.81	6.31±0.35	0.51
SpO2 (%) Mean±SE
TLV 1	98.25±0.28	99.00±0.13	0.04
OLV	96.80±0.34	96.95±0.32	0.93
TLV 2	98.42±0.30	98.89±0.15	0.57
FiO2 (%) Mean±SE
TLV 1	55.16±1.14	55.51±1.65	0.75
OLV	63.75±1.64	64.33±1.79	0.79
TLV 2	57.91±1.52	61.92±3.90	0.61
EtCO2 (%) Mean±SE
TLV 1	36.60±1.17	37.08±0.45	0.47
OLV	36.25±0.63	36.67±0.54	0.61
TLV 2	35.10±0.65	35.79±0.63	0.48
PIP (cmH2 O) Mean±SE
TLV 1	17.74±0.53	17.27±0.48	0.64
OLV	21.52±0.65	21.68±0.68	0.87
TLV 2	19.12±0.82	19.47±1.35	0.93
CPAP n (%)			0.77
Yes	1 (2%)	3 (6%)
No	49 (98%)	47 (94%)

VDLT, Video double-lumen tubes/VivaSight-DL; cDLT, Conventional double-lumen tubes; SE, Standard error; TLV1: initial two-lung ventilation; OLV, One-lung ventilation; TLV2, final two-lung ventilation; SpO₂, peripheral capillary oxygen saturation; FiO2, Fraction of inspired oxygen; EtCO₂, End-tidal carbon dioxide; PIP, airway peak inspiratory pressure; CPAP, Continuous positive airway pressure; n, number