Table 3 Changes in the oxygen reserve index during anaesthetic induction in the two groups
Time points | FMV (n = 98) | HFNO (n = 99) | P-value |
|---|---|---|---|
Baseline, before preoxygenation | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.839 |
At 1 min of preoxygenation | 0.21 ± 0.28 | 0.34 ± 0.33 | 0.003 |
At 2 min of preoxygenation | 0.56 ± 0.30 | 0.57 ± 0.29 | 0.840 |
At 3 min of preoxygenation | 0.60 ± 0.30 | 0.57 ± 0.29 | 0.553 |
Injection of propofol | 0.60 ± 0.31 | 0.57 ± 0.28 | 0.438 |
Injection of rocuronium | 0.63 ± 0.30 | 0.57 ± 0.27 | 0.179 |
At 1 min after rocuronium injection | 0.45 ± 0.24 | 0.47 ± 0.23 | 0.536 |
At 2 min after rocuronium injection | 0.42 ± 0.23 | 0.42 ± 0.21 | 0.964 |
Start of intubation attempt at 3 min after rocuronium injection | 0.40 ± 0.21 | 0.38 ± 0.19 | 0.478 |
Completion of intubation | 0.38 ± 0.21 | 0.38 ± 0.20 | 0.834 |