Table 6.
Changes of oxygenation index, respiratory index, and P(A-a)O2 levels at different time points (n=58, x̅ ± sd)
| Indicator | Group | T0 | T1 | T2 | T3 | F | P |
|---|---|---|---|---|---|---|---|
| OI (mmHg) | Observation group | 384.51±20.00 | 354.64±18.50 | 342.18±21.10 | 318.14±22.54 | 4.052 | 0.048 |
| Control group | 386.30±21.65 | 349.23±19.10 | 296.50±13.40 | 265.62±18.20 | 4.673 | 0.041 | |
| t | 0.216 | 0.512 | 13.918 | 13.806 | |||
| P | 0.703 | 0.508 | 0.000 | 0.000 | |||
| RI | Observation group | 0.12±0.03 | 0.58±0.10 | 1.07±0.18 | 0.33±0.06 | 4.185 | 0.046 |
| Control group | 0.11±0.04 | 0.61±0.11 | 1.76±0.30 | 0.74±0.14 | 5.184 | 0.038 | |
| t | 0.169 | 1.113 | 5.947 | 4.618 | |||
| P | 0.774 | 0.162 | 0.031 | 0.041 | |||
| P(A-a)O2 (mmHg) | Observation group | 28.54±5.65 | 251.72±75.90 | 261.31±85.27 | 41.31±9.18 | 361.64 | 0.000 |
| Control group | 27.91±6.23 | 284.34±74.31 | 296.83±63.14 | 48.17±8.30 | 374.22 | 0.000 | |
| t | 0.517 | 2.189 | 2.450 | 2.697 | |||
| P | 0.606 | 0.031 | 0.015 | 0.008 |
Note: T0: before anesthesia induction, T1: immediately after endotracheal intubation, T2: 1 h after one-lung ventilation; T3: 10 min before the end of operation. OI: oxygenation index; RI: respiratory index; P(A-a)O2: alveolar-arterial oxygen pressure difference.