American Society of Anesthesiologists

Fig. 2. Time course of arterial oxygen tension (Pao2). Data are expressed as mean ± SD. *P < 0.0001 versus T1 in four groups. †P < 0.05 versus Group R0.75. R0.25= 0.25% ropivacaine; R0.50= 0.50% ropivacaine; R0.75= 0.75% ropivacaine; S = saline; T1 = two-lung ventilation in the lateral decubitus position; T2 = one-lung ventilation after 10 min; T3 = one-lung ventilation after 20 min; T4 = at the end of surgery with two-lung ventilation.

Fig. 2. Time course of arterial oxygen tension (Pao²). Data are expressed as mean ± SD. *P < 0.0001 versus T1 in four groups. †P < 0.05 versus Group R^0.75. R^0.25= 0.25% ropivacaine; R^0.50= 0.50% ropivacaine; R^0.75= 0.75% ropivacaine; S = saline; T1 = two-lung ventilation in the lateral decubitus position; T2 = one-lung ventilation after 10 min; T3 = one-lung ventilation after 20 min; T4 = at the end of surgery with two-lung ventilation.

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