Table 2. Hemodynamic parameters of the patients.
| Group | Factor | T0 | T1 | T2 | T3 | T4 |
|---|---|---|---|---|---|---|
| I | n | 15 | 15 | 15 | 15 | 15 |
| MAP (mmHg) | 87.0±11.9 | 88.0±10.4 | 84.2±11.4 | 82.4±9.4 | 85.6±10.0 | |
| HR (bpm) | 63.7±10.9 | 67.5±8.7 | 65.4±9.0 | 68.8±9.6 | 71.3±8.2 | |
| II | n | 15 | 15 | 15 | 15 | 15 |
| MAP (mmHg) | 91.2±8.5 | 89.7±6.6 | 88.4±5.4 | 86.3±4.3 | 92.4±7.2 | |
| HR (bpm) | 64.7±10.1 | 67.5±8.7 | 66.5±7.4 | 66.0±7.4 | 72.5±8.1 | |
| III | n | 15 | 15 | 14 | 14 | 14 |
| MAP (mmHg) | 86.0±12.0 | 85.7±10.6 | 84.5±9.1 | 83.0±9.1 | 83.8±12.2 | |
| HR (bpm) | 67.6±7.0 | 69.9±8.1 | 68.5±8.4 | 67.0±6.2 | 70.1±6.8 | |
| IV | n | 15 | 15 | 10 | 10 | 10 |
| MAP (mmHg) | 86.3±12.9 | 102.3±13.5 | 90.5±9.7 | 90.4±10.5 | 89.4±11.1 | |
| HR (bpm) | 61.0±8.0 | 70.8±13.5 | 67.9±6.5 | 66.0±5.6 | 62.7±5.4 |
Data are shown as means ± SD. Group I: control group (no PEEP); Group II: received PEEP at 4 cmH2O; Group III: received PEEP at 8 cmH2O; Group IV: received PEEP at 12 cmH2O. T0: baseline (after anesthesia induction but before PNP and position change); T1: 5 min after PNP and position change; T2: 30 min and T3: 60 min after PEEP; T4: end of surgery but before extubation. No significant difference at all time points among the groups (all P>0.05). PNP, pneumoperitoneum; MAP, mean arterial pressure; HR, heart rate.