4.
每组患者无通气安全时限和气管插管时长的比较
Intubation time and safe duration of apnea in the two groups (Mean±SD)
| Safe time for apnea (s) | Intubation time (s) | P | |
| Group 1: Preoxygenation with 100% oxygen; Group 2: Without preoxygenation. | |||
| Group 1 (n=40) | 469.5±143.0 | 34.4±12.6 | < 0.01 |
| Group 2 (n=38) | 63.6±20.0 | 32.8±9.6 | < 0.01 |