Table 5. Blood gas analyses before wound disclosure, 15, 30 and 60 min after wound closure (±s).

	Before wound disclosure	15 min after wound closure	30 min after wound closure	60 min after wound closure
pH	7.30±0.06	7.29±0.06	7.32±0.05	7.34±0.03
PaCO2 (mmHg)	57.6±10.6	54.1±11.3.	48.9±7.30*	47.7±4.45**
PaO2 (mmHg)	260.7±119.2	144.1±98.8*	144.1±69.3**	133.8±42.5**
Oxygenation index	411.1±149.9	289.5±141.7**	410.5±117.6	420.7±146.7
HCO3- (mmol/L)	27.7±2.1	25.5±2.5**	25.0±2.6**	25.6±2.2**
BE (mmol/L)	1.10±1.76	-1.00±2.41*	-1.19±2.80*	-0.39±2.43
Lac (mmol/L)	0.65±0.44	1.08±1.33	1.13±0.98	0.97±0.63

Compared with those before wound disclosure, * P<0.05, ** P<0.01