TABLE 4.
Mean pleural pressures in the intervention group
| Pleural pressure | Number of patients | Mean±SD |
|---|---|---|
| Opening pleural pressure | 55 | 17.09±11.7 |
| Pleural pressure after withdrawal of 200 mL | 55 | 8.82±7.78 |
| Pleural pressure after withdrawal of 400 mL | 55 | 2.18±12.04 |
| Pleural pressure after withdrawal of 600 mL | 55 | –0.55±12.15 |
| Pleural pressure after withdrawal of 800 mL | 45 | 2.22±8.01 |
| Pleural pressure after withdrawal of 1,000 mL | 45 | –0.44±7.97 |
| Pleural pressure after withdrawal of 1,200 mL | 40 | –3.25±8.03 |
| Pleural pressure after withdrawal of 1,400 mL | 40 | –6.00±7.91 |
| Pleural pressure after withdrawal of 1,600 mL | 35 | –11.29±11.24 |
| Pleural pressure after withdrawal of 1,800 mL | 30 | –11.67±5 |
| Pleural pressure after withdrawal of 2,000 mL | 25 | –15.80±5.53 |
| Pleural pressure after withdrawal of 2,200 mL | 25 | –21.80±7.45 |
| Pleural pressure after withdrawal of 2,400 mL | 10 | –19.00±0 |
| Pleural pressure after withdrawal of 2,600 mL | 5 | –20.00±0 |
| Pleural pressure after withdrawal of 2,800 mL | 5 | –21.00±0 |
| Pleural pressure after withdrawal of 3,000 mL | 5 | –21.00±0 |
| Closing pleural pressure | 55 | –19.18±10.86 |