Table 2. Intraoperative Regional Cerebral Oxygen Saturation (rSO₂) Variables According to Categories of Integrated rSO₂ ≤ 45%.

Variable	Integrated rSO₂ ≤ 45% (min%)
Variable	0 (N=66)	0.3 – 39 (N=12)	60 – 383 (N=11)	P
Integrated rSO₂ ≤ 45% (min%)	0	17 ± 14	148 ± 96	<0.001
Total duration ≤ 45% (min)	0	6 ± 6	33 ± 19	<0.001
Longest duration ≤ 45% (min)	0	6 ± 5	20 ± 7	<0.001
Post-induction – 60 min post-CPB
Average rSO₂ (%)	79 ± 6	69 ± 7	67 ± 9	<0.001
Minimum rSO₂	56 ± 7	40 ± 3	33 ± 7	<0.001
Post-induction – on-CPB
Average rSO₂	69 ± 10	58 ± 6	51 ± 7	<0.001
Minimum rSO₂	60 ± 9	44 ± 8	41 ± 9	<0.001
Onset cooling – onset last rewarming
Average rSO₂	85 ± 7	79 ± 11	73 ± 11	<0.001
Minimum rSO₂	67 ± 11	57 ± 13	43 ± 14	<0.001
Onset last rewarming – off-CPB
Average rSO₂	81 ± 10	74 ± 11	76 ± 13	0.06
Minimum rSO₂	71 ± 12	61 ± 10	65 ± 13	0.02
Off-CPB – 60 min post-CPB
Average rSO₂	78 ± 9	63 ± 9	63 ± 13	<0.001
Minimum rSO₂	68 ± 10	54 ± 11	49 ± 15	<0.001

Values are expressed as mean ± standard deviation. P values are determined by analysis of variance.

Table 2. Intraoperative Regional Cerebral Oxygen Saturation (rSO2) Variables According to Categories of Integrated rSO2 ≤ 45%.