Table 1.
Demographic data and baseline values for haemodynamic, plethysmographic and respiratory parameters
| Parameter | Value (mean ± SD) | Range |
| Demography | ||
| Age (year) | 64 ± 11 | 41–85 |
| Height (cm) | 166 ± 8 | 155–180 |
| Weight (kg) | 65 ± 12 | 106–17 |
| Arterial blood pressure and heart rate | ||
| Systolic blood pressure (mmHg) | 116 ± 20 | 78–146 |
| Diastolic blood pressure (mmHg) | 57 ± 14 | 39–89 |
| Mean arterial pressure (mmHg) | 75 ± 15 | 54–105 |
| Heart rate (beats/min) | 97 ± 19 | 66–133 |
| PPmax (mmHg) | 66 ± 15 | 39–95 |
| PPmin (mmHg) | 60 ± 16 | 29–90 |
| ΔPP (%) | 12 ± 8 | 2–34 |
| Pulse oximetry plethysmography | ||
| POPmax (mm) | 52 ± 4 | 43–61 |
| POPmin (mm) | 46 ± 3 | 37–51 |
| ΔPOP (%) | 12 ± 8 | 3–37 |
| SpO2 (%) | 96 ± 3 | 90–100 |
| Respiratory parameters | ||
| PaO2/FiO2 (mmHg) | 233 ± 99 | 67–440 |
| Vt (ml/kg) | 8 ± 2 | 5–13 |
| Respiratory rate (breaths/min) | 19 ± 5 | 12–30 |
| PEEP (cm H2O) | 5 ± 4 | 0–15 |
ΔPOP, respiratory variations in pulse oximetry plethysmographic waveform amplitude; ΔPP, respiratory variations in pulse pressure; PaO2/FiO2, ratio of arterial oxygen tension to fractional inspired oxygen; PEEP, positive end-expiratory pressure; SpO2, pulse oximeter oxygen saturation; Vt, tidal volume.