Table 1 Patient characteristics, anaesthetics and mode of ventilation

Age (years)

47 ± 15

Female gender (%)

47

Body surface area (m²)

1.8 ± 0.3

Propofol (mg/kg/h)

8.6 ± 2.9

Remifentanil (μg/kg/min)

0.11 ± 0.04

Bispectral index (%

39 ± 9

Respiratory rate (breaths/min)

13 ± 2

Tidal volume (ml)

422 ± 73

Inspired fraction of oxygen (%)

32 ± 3

Positive end-expiratory pressure (mmHg)

5 ± 3