Table 6.
Comparison of characteristics and values of PetCO2 between patients with ROSC and without ROSC in nonshockable initial rhythm in cardiac arrest
| ROSC (n = 191) | Non-ROSC (n = 242) | P value | |
| Age (years) | 59.6 ± 12.9 | 60.5 ± 12.9 | 0.45 |
| Initial PetCO2 (kPa [mmHg]) | 3.7 ± 1.9 (27.8 ± 14.3) | 3.1 ± 2.6 (23.3 ± 19.6) | 0.02 |
| 1 minute PetCO2 (kPa [mmHg]) | 2.8 ± 1.6 (21.1 ± 13.2) | 2.7 ± 1.4 (20.3 ± 11.2) | 0.44 |
| Average PetCO2 (0 to 10 minutes; kPa [mmHg]) | 2.8 ± 0.9 (22.2 ± 6.8) | 1.1 ± 0.4 (7.8 ± 3.8) | < 0.001 |
| 10 minute PetCO2 (kPa [mmHg]) | 3.3 ± 1.1 (24.8 ± 7.8) | 1.2 ± 0.5 (8.2 ± 3.6) | <0.001 |
| Average 11 to 15 minute PetCO2 (kPa [mmHg]) | 3.2 ± 0.8 (24.1 ± 6.3) | 1.0 ± 0.3 (7.7 ± 2.6) | <0.001 |
| 15 minute PetCO2 (kPa [mmHg]) | 3.6 ± 0.9 (27.1 ± 7.2) | 1.1 ± 0.4 (7.9 ± 3.5) | <0.001 |
| 20 minute PetCO2 (kPa [mmHg]) | 4.4 ± 1.2 (33.1 ± 9.1) | 0.9 ± 0.3 (9.2 ± 2.7) | <0.001 |
| Max PetCO2 (kPa [mmHg]) | 5.4 ± 1.5 (40.1 ± 12.3) | 1.8 ± 0.6 (15.6 ± 4.4) | <0.001 |
| Final PetCO2 (kPa [mmHg]) | 3.6 ± 0.9 (27.3 ± 7.1) | 0.9 ± 0.3 (7.3 ± 2.5) | <0.001 |
Nonshockable' was defined as asystole or pulseless electrical activity. Values are expressed as mean ± standard deviation. PetCO2, partial pressure of end-tidal carbon dioxide; ROSC, restoration of spontaneous circulation.