Table 2.
Isoflurane bispectral index (BIS), median frequency (MED) and 95% spectral edge frequency (SEF95) data for each MAC level and each condition. All values are from combined data (both left and right sides)
| Iso MAC Condition | 1.2 CV | SV | ST | 1.4 CV | SV | ST | 1.6 CV | SV | ST |
|---|---|---|---|---|---|---|---|---|---|
| BIS | |||||||||
| Mean | 66.09 | 70.25 | 74.19 | 72.04 a | 71.85 | 71.67 | 56.50 a | 66.31 | 65.69 |
| SD | 6.70 | 11.93 | 10.73 | 3.60 | 9.76 | 10.22 | 16.92 | 8.55 | 10.40 |
| MED | |||||||||
| Mean | 3.47 | 3.23 | 3.35 | 3.47 | 3.22 | 3.36 | 3.61 | 3.48 | 3.16 |
| SD | 0.40 | 0.29 | 0.19 | 0.26 | 0.31 | 0.28 | 0.24 | 0.38 | 0.65 |
| SEF95 | |||||||||
| Mean | 11.78 | 10.75 bc | 11.26 | 12.00 | 11.47 b | 11.02 | 12.33 | 11.44 c | 10.97 |
| SD | 1.35 | 1.53 | 0.85 | 0.40 | 1.41 | 1.14 | 0.83 | 1.30 | 1.47 |
| SR | |||||||||
| Mean | 3.55 | 0 | 0 | 1.87 | 0 | 0 | 8.01 | 8.82 | 6.29 |
| SD | – | – | – | 1.44 | – | – | 10.60 | 8.58 | 6.95 |
SR, suppression ratio; CV, controlled ventilation; SV, spontaneous ventilation; ST, stimulation. Matching letters denote statistical significance between datasets.