Table 2.
Intrapleural and airway pressure during sequential CPR interventions
| STD | ACD | ACD-ITD | ACD-ITPR | |
|---|---|---|---|---|
| Ppl mean | 0.8 ± 1.1 | −1.6 ± 1.6 | −3.7 ± 1.5*,** | −7.0 ± 1.9*,**,*** |
| Ppl max | 6.8 ± 0.9 | 9.4 ± 1.3 | 8.4 ± 1.2 | 5.9 ± 1.8** |
| Ppl min | −6.3 ± 2.2 | −13.0 ± 3.8* | −16.9 ± 3.6*,** | −18.7 ± 3.5*,** |
| Ppl delta | 13.1 ± 2.2 | 22.5 ± 3.5* | 26.2 ± 4* | 24.6 ± 3.3* |
| Paw mean | 0.3 ± 0.3 | 0.3 ± 0.3 | −2.0 ± 0.6*,** | −8.4 ± 1.0*,**,*** |
| Paw max | 1.4 ± 0.3 | 2.2 ± 0.4 | 3.3 ± 1.1 | −5.1 ± 1.4*,**,*** |
| Paw min | −0.9 ± 0.3 | −1.4 ± 0.3 | −9.4 ± 0.8*,** | −11.9 ± 0.8*,**,*** |
| Paw delta | 2.3 ± 0.3 | 3.6 ± 0.4 | 12.6 ± 1.1*,** | 6.4 ± 1.4*,**,*** |
Values are shown as mean ± SEM (mm Hg). All pressures are in mm Hg. Data are derived from 8 animals
CPR cardiopulmonary resuscitation, STD standard, ACD active compression decompression, ITD impedance threshold device, ITPR intrathoracic pressure regulator, Ppl intrapleural pressure, Paw Airway pressure; max, maximum (compression); min, minimum (decompression)
*denotes p < 0.05 for STD vs. (ACD, ACD ITD, ACD ITPR)
**denotes p < 0.05 for ACD vs. (ACD ITD, ACD ITPR)
***denotes p < 0.05 for ACD-ITD vs. ACD-ITPR