Two-minute disconnection technique with a double-lumen tube to speed the collapse of the non-ventilated lung for one-lung ventilation in thoracoscopic surgery

Table 3 Blood gas analysis

Variable	Group	T₀	T₁	T₂	T₃	T₄
pH	N (n = 20)	7.39 ± 0.03	7.40 ± 0.04	7.34 ± 0.04*	7.37 ± 0.03*	7.36 ± 0.04*
	C (n = 20)	7.37 ± 0.03	7.38 ± 0.03	7.35 ± 0.04	7.35 ± 0.03*	7.36 ± 0.04
PaCO₂	N (n = 20)	36.1 ± 2.0	37.1 ± 3.1	47.7 ± 2.9*†	44.1 ± 4.5*	38.5 ± 4.2 *
(mmHg)	C (n = 20)	36.9 ± 1.8	37.0 ± 3.9	39.2 ± 3.4*	43.6 ± 2.3*	39.3 ± 4.9*
PaO₂	N (n = 20)	82 ± 3.1	418 ± 48.9*	234 ± 81.1*†	239 ± 77.7*	272 ± 94.3*
(mmHg)	C (n = 20)	84 ± 3.5	428 ± 47.9*	335 ± 33.4*	230 ± 70.9*	282 ± 96.0*

The data are expressed as the mean ± SD values. * P < 0.05 compared with T₀. ^† P < 0.05 compared with group C

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