Effect of lung expansion on the intersystem differences in mean minimum and maximum values of intrapleural pressure (IPPmin and IPPmax)
| Intersystem difference | Lung expanded | Lung not expanded | Difference of means | 95% CI | p value (t test) |
|---|---|---|---|---|---|
| IPPmin (mm Hg) | 3.2 | 0.4 | 2.8 | 0.1 to 5.5 | 0.042 |
| IPPmax (mm Hg) | 1.2 | 0.4 | 0.8 | −0.8 to 2.4 | 0.31 |