| Baseline | PEEP | PEEP+external abdominal pressure | External abdominal pressure | End of experiment | P* |
---|---|---|---|---|---|---|
Intraperitoneal pressure | 6 ± 1 | 6 ± 1 | 9 ± 2## | 9 ± 2## | 5 ± 1 | <0.001 |
Urinary bladder pressure | 6 ± 2 | 7 ± 2 | 11 ± 2## | 10 ± 2## | 6 ± 1 | <0.001 |
Intragastric pressure | 6 ± 2 | 8 ± 2 | 11 ± 2## | 10 ± 2## | 6 ± 2 | <0.001 |
Inferior vena cava pressure | 11 ± 4 | 12 ± 3# | 15 ± 4# | 14 ± 3# | 11 ± 3 | <0.001 |
Diastolic pulmonary artery pressure | 14 ± 5 | 16 ± 4# | 17 ± 5 | 16 ± 5& | 14 ± 6 | 0.003 |