Outcome measure | Frequency (%) |
---|---|
Adverse events | |
None | 164 (73.2) |
Major | |
Respiratory distress | 1 (0.4) |
Hypoxia | 0 |
Minor | |
Vomiting | 19 (8.5) |
Mask intolerance | 38 (17.0) |
Dysphoria | 2 (0.9) |
Maximum concentration of nitrous oxide (N 2 O as %) | |
50% | 67 (29.9) |
60% | 88 (39.2) |
70% | 69 (30.8) |
mean 60.2% | |
(95% CI 59.1 to 61.2) | |
median 60% |