Table 1.
Physiological parameters during helmet-based noninvasive ventilation
| Parameters | 0 h | 3 h | 5 h | 15 h | 40 h | 63 h | |
| Heart rate (bpm) | 60 | 96 | 94 | 72 | 68 | 77 | |
| Respiratory rate (bpm) | 19 | 36 | 32 | 30 | 17 | 19 | |
| Blood pressure (mmHg) | 74/47 | 166/85 | 159/80 | 91/57 | 99/59 | 115/69 | |
| ABG | pH | 7.19 | 7.14 | 7.18 | 7.25 | 7.33 | 7.36 |
| PaCO2 (mmHg) | 77.6 | 75.2 | 73..3 | 65.3 | 55.3 | 49.2 | |
| PaO2 (mmHg) | 70.2 | 75.8 | 69.7 | 82.3 | 80.2 | 78.2 | |
| NIV mode | FiO2 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| PEEP | 8 | 10 | 10 | 10 | 10 | 10 | |
| PS | 10 | 12 | 12 | 12 | 12 | 12 | |
ER: Emergency room; ABG: Arterial blood gas; PaO2: Arterial oxygen partial pressure; PaCO2: Partial arterial carbon dioxide; NIV: Noninvasive ventilation; FiO2: Fraction of inspired oxygen; PEEP: Positive end-expiratory pressure; PS: Pressure support.