Table 1. Preoperative and Operative Characteristics According to Categories of Integrated Cerebral Oxygen Saturation (rSO2) ≤ 45%.
| Variable | Integrated rSO2 ≤ 45% (min%) | |||
|---|---|---|---|---|
| 0 (N=66) |
0.3 – 39 (N=12) |
60 – 383 (N=11) |
P | |
| Preoperative Characteristics | ||||
| Birth weight (kg) | 3.5 ± 0.5 | 3.3 ± 0.6 | 3.3 ± 0.4 | 0.16 |
| Gestational age (wk) | 39.2 ± 1.3 | 39.2 ± 1.6 | 39.2 ± 1.0 | 1.0 |
| Sex (% male) | 64 | 42 | 55 | 0.35 |
| Race (% non-white) | 20 | 33 | 9 | 0.38 |
| Age at surgery (days), median (range) | 38 (2-200) | 64 (4-263) | 11 (7-198) | 0.35 |
| Neonatal status (% age ≤ 30 days) | 48 | 33 | 72 | 0.17 |
| Abnormal neurologic examination, n/total (%) | 27/47 (57) | 6/9 (67) | 4/10 (40) | 0.50 |
| Diagnosis, n (%) | 0.06 | |||
| TGA | 28 (42) | 2 (17) | 7 (64) | |
| TOF | 26 (39) | 5 (42) | 1 (9) | |
| VSD | 12 (18) | 5 (42) | 3 (27) | |
| Operative Characteristics | ||||
| Cross clamp time (min) | 65 ± 23 | 60 ± 29 | 94 ± 44 | 0.004 |
| Total support time (min) | 104 ± 30 | 101 ± 38 | 147 ± 69 | 0.002 |
| Total bypass time (min) | 95 ± 24 | 95 ± 36 | 122 ± 61 | 0.04 |
| Low-flow bypass time (min) | 48 ± 23 | 47 ± 31 | 67 ± 36 | 0.07 |
| Duration of circulatory arrest (min) | 8 ± 11 | 5 ± 13 | 25 ± 21 | <0.001 |
Values are expressed as mean ± standard deviation. P values are determined by analysis of variance for continuous variables and Fisher's exact test for categorical variables.
TGA = D-transposition of the great arteries
TOF = tetralogy of Fallot
VSD = ventricular septal defect