| Variable | Median (IQR) |
| Age, months | 3 (2 - 6) |
| Height, cm | 59 (53.5 - 64.75) |
| Weight, kg | 4.7 (3.6 - 6.2) |
| Gender, male, n (%) | 56 (65.2) |
| Operation time, min | 261 (170 - 350) |
| Use of CPB, n (%) | 68 (77.3) |
| ETT diameter, mm | 3.5 (3 - 4.5) |
| Cuff available, n (％) | 48 (55.8) |