Table 1. Comparison of parameters between manual and mechanical chest compression groups at baseline and at 10 minutes of asphyxia before the beginning of cardiopulmonary resuscitation.
| Parameter | Manual chest compressions Mean SD |
Mechanical chest compressions Mean SD |
p |
|---|---|---|---|
| Weight (kg) | 9.9 1.8 | 9.9 0.9 | .871 |
| Time to CA (minutes) | 7.1 1.3 | 6.9 1.2 | .661 |
| Basal Heart rate (bpm) | 110.0 26.8 | 111.3 28.6 | .877 |
| Asphyxia Heart rate (bpm) | 63.4 18.9 | 58.4 22.5 | .520 |
| Basal MAP (mmHg) | 78.7 13.4 | 71.9 14.8 | .101 |
| Asphyxia MAP (mmHg) | 12.9 5.3 | 14.7 4.8 | .336 |
| Basal pH | 7.47 0.03 | 7.45 0.03 | .112 |
| Asphyxia pH | 7.12 0.08 | 7.09 0.07 | .194 |
| Basal PaO2 (mmHg) | 155.5 46.8 | 134.3 41.6 | .113 |
| Asphyxia PaO2 (mmHg) | 12.4 4.4 | 13.2 4.9 | .546 |
| Basal PaCO2 (mmHg) | 41.7 4.7 | 44.0 3.5 | .071 |
| Asphyxia PaCO2 (mmHg) | 84.3 15.1 | 85.7 13.3 | .751 |
| Basal arterial SatO2 (%) | 98.8 1.8 | 98.7 1.1 | .297 |
| Asphyxia arterial SatO2 (%) | 8.2 5.0 | 7.8 5.1 | .838 |
| Basal Lactate (mmol/L) | 0.8 0.4 | 0.7 0.2 | .161 |
| Asphyxia Lactate (mmol/L) | 5.7 1.4 | 5.7 1.6 | .994 |
Asphyxia: 10 minutes of asphyxia. CA: cardiac arrest; MAP: mean arterial pressure. PaO2: oxygen arterial pressure; PaCO2: CO2 arterial pressure; SD: standard deviation.