Table 4.
Halothane 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)
| Hal MAC Condition | 1.2 CV | SV | ST | 1.4 CV | SV | ST | 1.6 CV | SV | ST |
|---|---|---|---|---|---|---|---|---|---|
| BIS | |||||||||
| Mean | 76.82 | 66.94 | 71.57 | 77.48 | 67.43 | 73.07 | 76.12 | 75.00 | 73.99 |
| SD | 11.95 | 8.51 | 7.88 | 9.65 | 8.08 | 7.16 | 6.79 | 8.84 | 9.67 |
| MED | |||||||||
| Mean | 3.47 | 2.68 a | 2.94 | 3.55 | 3.17 | 3.92 | 4.22 | 3.58 a | 3.59 |
| SD | 0.84 | 0.76 | 0.64 | 0.52 | 0.29 | 0.88 | 1.66 | 0.39 | 0.51 |
| SEF95 | |||||||||
| Mean | 16.35 | 12.49 | 15.46 | 14.95 | 13.50 | 15.79 | 15.63 | 15.44 | 16.18 |
| SD | 3.18 | 3.86 | 2.90 | 2.72 | 2.06 | 1.80 | 3.16 | 3.21 | 3.27 |
| SR | |||||||||
| Mean | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| SD | – | – | – | – | – | – | – | – | – |
SR, suppression ration; CV, controlled ventilation; SV, spontaneous ventilation; ST, stimulation. Matching letters denote statistical significance between datasets.