Table 5.
Comparison of Qs/Qt and OI at different time points between the two groups (x̅±sd)
| Indicators | n | T0 | T1 | T2 | T3 | T4 | T5 |
|---|---|---|---|---|---|---|---|
| Qs/Qt | |||||||
| Titration group | 40 | 9.78±4.54 | 9.56±3.39 | 8.01±3.43*,# | 7.81±3.72*,# | 7.21±4.64*,# | 8.19±4.42 |
| Control group | 40 | 10.16±3.96 | 9.74±3.32 | 9.67±3.57 | 9.48±3.64 | 9.36±4.92 | 9.65±4.31 |
| OI (mmHg) | |||||||
| Titration group | 40 | 354.50±67.48 | 389.43±78.94 | 422.16±59.95*,# | 431.53±60.40*,# | 442.91±61.67*,# | 415.91±53.51* |
| Control group | 40 | 355.97±69.34 | 380.81±79.62 | 389.82±51.78 | 394.43±67.32 | 402.22±66.48 | 383.64±54.19 |
Note: 1 mmHg = 0.133 KPa; 1 cmH2O = 0.098 KPa.
Compared with the control group;
*
P<0.05.
Compared with T1 of the titrition group;
#
P<0.05.
Qs/Qt: intrapulmonary shunt fraction; OI: oxygenation index; T0: prone position; T1: PEEP ventilation for 10 min; T2: PEEP ventilation for 30 min; T3: PEEP ventilation for 60 min; T4: at the end of surgery; T5: 20 min after extubation.