Table 2.
Patient characteristics and cardiac arrest findings on-site in thirty-five patients with laryngeal tube ventilation and in forty-one patients with bag valve mask ventilation
| LT group (n = 35) | BVM group (n = 41) | p-value | |
|---|---|---|---|
| Patient characteristics | |||
| Male gender (n; %) | 23; 65.7 | 26; 63.4 | 0.811 |
| Age (year; SD) | 69.1 ± 17.4 | 71.4 ± 13.7 | 0.554 |
| Witnessed arrest (n; %) | 11; 31.4 | 15; 36.6 | 0.993 |
| Hospital discharge (n; %) | 1; 2.9 | 1; 2.4 | 0.848 |
| Intervals | |||
| Call - CPR onset (median; IQR) | 3 (1; 9.5) | 4 (1; 7) | 0.885 |
| Call - effective ventilation (min; ±SD) | 10.1 ± 8.0 | 8.9 ± 5.8 | 0.705 |
| Call - hospital arrival (min; ±SD) | 68.4 + 50.5 | 53.1 + 13.3 | 0.953 |
| Basic Life Support | |||
| Bystander CPR (n; %) | 18; 51.4 | 13; 31.7 | 0.169 |
| Effective CPR (n; % | 11; 31.4 | 6; 14.6 | 0.095 |
| Advanced Life Support | |||
| Effective ventilation (n; %) | 25; 71.4 | 24; 58.5 | 0.686 |
| Tracheal intubation (n; %) | 11; 31.4 | 9; 22.0 | 0.374 |
| First CO2 (mm Hg; SD) | 33.0 ± 16.9 | 23.5 ± 19.6 | 0.12 |
| First documented ECG rhythm | 0.606 | ||
| Asystole (n; %) | 20; 57.1 | 17; 41.5 | |
| Pulse-less electrical activity (n; %) | 6; 17.1 | 7; 17.0 | |
| pVT/VF (n; %) | 8; 22.9 | 11; 26.8 | |
| ROSC (n; %) | 9; 25.7 | 7; 17.1 | 0.478 |
| Heart rate (mean, ±SD) | 87.2 ± 23.1 | 73.0 ± 38.6 | 0.375 |
| Systolic blood pressure (mean, ±SD) | 122.4 ± 39.2 | 94.6 ± 28.8 | 0.185 |
| O2 saturation (mean, ±SD) | 91.1 ± 7.9 | 86.8 ± 8.7 | 0.272 |
| Complications | 0.961 | ||
| Aspiration (n) | 0 | 1 | |
| Airway bleeding (n) | 1 | 1 | |
| Regurgitation (n) | 4 | 7 | |
BVM bag valve mask, CO 2 carbon dioxide, CPRcardiopulmonary resuscitation, ECG Electrocardiography, IQR interquartile range, LT laryngeal tube, n number, O 2 oxygen, pVT pulseless ventricular tachycardia, ROSCreturn of spontaneous circulation, SD standard deviation, VF ventricular fibrillation