Respiratory system, lung, and chest wall elastance at increasing elastic recoil pressure in adult pigs
| ZEEP | PEEP | |||||||||||
| E RS | E L | E CW | E RS | E L | E CW | |||||||
| 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | |
| 5 | 1.49b | 1.20 | 0.60a | 0.45 | 0.89a | 0.75 | ||||||
| 10 | 1.26c | 0.93 | 0.57a | 0.39 | 0.69c | 0.54 | 1.04b(b) | 0.93 | 0.46a | 0.38 | 0.58(a) | 0.54 |
| 15 | 1.38b | 0.90 | 0.70a | 0.36 | 0.68 | 0.54 | 1.13b(a) | 0.90 | 0.52b | 0.38 | 0.61a | 0.52 |
| 20 | 1.35a | 1.10 | 0.76a | 0.61 | 0.59a | 0.48 | 1.34b | 1.04(b) | 0.76a | 0.58(a) | 0.58b | 0.46 |
| 25 | 1.18a | 1.41 | 0.73a | 0.91 | 0.46 | 0.50 | 1.50a(b) | 1.36 | 0.99(c) | 0.90(a) | 0.51 | 0.46 |
| 30 | 1.00b | 1.61 | 0.57c | 1.11 | 0.42 | 0.50 | 1.48b(b) | 1.82(c) | 1.01b(c) | 1.32(c) | 0.46 | 0.50 |
| 35 | 1.05c | 1.49 | 0.55c | 1.00 | 0.50 | 0.49 | 1.36b(a) | 2.16(c) | 0.85b(a) | 1.64(c) | 0.51 | 0.51 |
| 40 | 1.62b | 2.21(b) | 0.87b | 1.63(b) | 0.75a | 0.56 | ||||||
Data are presented as means and elastance units are cmH2O·mL−1·kg. ZEEP: zero end-expiratory pressure; PEEP: positive end-expiratory pressure; ERS, EL, and ECW: respiratory system, lung, and chest wall elastance, respectively; Pel,RS: respiratory system elastic recoil pressure; 1: 1st recording; 2: 2nd recording. p-values are reported as difference between 1st and 2nd recordings (difference between corresponding ZEEP and PEEP recordings). a: p<0.05; b: p<0.01; c: p<0.001.