Number of patients requiring a change of interface throughout the whole period of mechanical ventilation and the side-effects in the two groups
| Helmet | Mask | |
|---|---|---|
| Subjects n | 39 | 41 |
| Change of interface n/N (%) | 2 (5.1) | 1 (2.4) |
| Reason | Claustrophobia in 2 (5.1) | Deterioration of ABGs in 1 (2.4) |
| ETI | 0 (0) | 2 (4.8) |
| Side-effects | ||
| Noise | 4 (10.2) | 0 (0) |
| Claustrophobia | 2 (5.1) | 1 (2.4) |
| Gastric distension | 2 (5.1) | 2 (4.8) |
| Vomiting | 0 (0) | 1 (2.4) |
| Sweating | 0 (0) | 0 (0) |
| Tightness | 3 (7.6) | 5 (12.1) |