Fig. 2From: Effects of positive end-expiratory pressure on regional cerebral oxygen saturation in elderly patients undergoing thoracic surgery during one-lung ventilation: a randomized crossover-controlled trialEffect of PEEP on rSO2 and PaO2 in elderly patients during thoracoscopic lobectomy. (A.) (B.)There were significant differences among TLV and three PEEP levels of OLV both in rSO2 and PaO2. * OLV(0) vs. OLV(10): p = 0.008. ** OLV(0) vs. OLV(5): p = 0.005;*** OLV(0) vs. OLV(10): p = 0.001; (C.) (D.) In the column chart, rectangles depict the mean differences, and the error bars signify the standard error. TLV, two-lung ventilation; OLV, one-lung ventilation; rSO2, regional cerebral oxygen saturation; PaO2, arterial oxygen partial pressure; OLV(0), OLV ventilation with 0 cmH2O PEEP; OLV(5), OLV ventilation with 5 cmH2O PEEP; OLV(10), OLV ventilation with 10 cmH2O PEEPBack to article page