Table 2 Intraoperative profiles

Anaesthesia time (min)

181±29

178±23

Operation time (min)

139±27

135±22

Prone time (min)

154±28

149±23

End-tidal sevoflurane concentration (%)

2.0±0.3

1.9±0.4

Fluid infusion

 Baseline (ml)

211±40

203±38

 Number of boluses (n)

7±2

5±2^{^^^}

 Total bolus volume (ml)

1747±517

1099±395^{^^^}

 Blood loss (ml)

150±67

162±70

 Urine output (ml)

302±163

163±63 ^{^^^}

 Body temperature (°C)

36.5±0.2

36.5±0.3

PPV (%)

 Baseline

14±2

15±2

 Intraoperative time-weighted average

8±1^***

14±1^{^^^}

Haematocrit (%)

 Baseline before anaesthesia

39.9±1.1

40.2±1.6

During anaesthesia

 1 h

36.2±1.0^***

37.1±1.2^{***^}

 2 h

35.6±1.1^***

36.9±1.1^{***^^}

End of surgery

35.4±1.3^***

36.8±1.1^{***^^}

PaO₂ (mmHg)

 Baseline before anaesthesia

85.1±9.7

85.9±11.2

During anaesthesia

 1 h

297.1±63.4^***

297.6±55.9^***

 2 h

294.4±61.9^***

300.8±49.8^***

End of surgery

290.5±60.2^***

292.8±46.4^***

PaCO₂ (mmHg)

 Baseline before anaesthesia

36.3±2.4

36.1±2.4

During anaesthesia

 1 h

36.9±2.4

37.3±1.5^**

 2 h

37.0±2.0

36.6±1.1

End of surgery

37.2±1.3 ^**

36.3±1.4

Lactate (mmol•L^–1)

 Baseline before anaesthesia

0.9±0.2

0.8±0.3

During anaesthesia

 1 h

1.2±0.2^***

1.1±0.3^***

 2 h

1.2±0.2^***

1.1±0.3^***

End of surgery

1.2±0.2^***

1.1±0.3^***

Patients needed vasopressors (n)

39

40

Total ephedrine dose (mg)

3±4

3±3

Total phenylephrine dose (μg)

29±36

36±39