Intraoperative ventilation in four specific periods
| Five minutes after induction and beginning of ventilation | Five minutes after CO2 insufflation | Five minutes after definitive positioning | Five minutes after desinsufflation and return to supine | |||||
| Patients | P values | Patients | P values | Patients | P values | Patients | P values | |
| Surgical positioning | ||||||||
| Dorsal decubitus | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Ventral decubitus | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Lateral decubitus | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Lithotomy | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Trendelenburg | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Reverse Trendelenburg | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Sitting | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Mode of ventilation | ||||||||
| Pressure controlled | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Volume controlled | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| PCVG | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Other | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Peak pressure, cmH2O | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Plateau pressure, cmH2O | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Driving pressure, cmH2O | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| PEEP, cmH2O | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Tidal volume, mL/kg PBW | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Respiratory rate, mpm | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| FiO2, % | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Static CRS, mL/cmH2O | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Dynamic CRS, mL/cmH2O | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Use of recruitment manoeuvres | ||||||||
| Increase in PEEP | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Increase in tidal volume | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Increase in tidal volume and PEEP | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| Manual insufflation with bag | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| CPAP | n/Total (%) | n/Total (%) | n/Total (%) | n/Total (%) | ||||
| SpO2, % | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| etCO2, mm Hg | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Mean arterial pressure, mm Hg | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Heart rate, bpm | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
| Pressure of CO2 insufflation, mm Hg | Mean±SD | Mean±SD | Mean±SD | Mean±SD | ||||
bpm, beats per minute; CPAP, continuous positive airway pressure; CRS, respiratory system compliance; etCO2, end-tidal carbon dioxide; FiO2, fraction of inspired oxygen; mpm, movements per minute; PBW, predicted body weight; PCVG, pressure controlled volume guaranteed; PEEP, positive-end expiratory pressure; SpO2, pulse oximetry.