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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Anesthesiology. 2015 Oct;123(4):765–774. doi: 10.1097/ALN.0000000000000798

Table 3.

BIS values (mean ± standard deviation) at the set ventilatory points of the study for the study group and for each anesthetic choice.

Supine Beach Chair
Set Point 1 Set Point 2 Set Point 3 Set Point 4 Set Point 5
Fio2 0.3
Petco2 30 mmHg		 Fio2 0.3
Petco2 30 mmHg		 Fio2 1.0
Petco2 30 mmHg		 Fio2 1.0
Petco2 45 mmHg		 Fio2 0.3
Petco2 30 mmHg
Combined
N=56		 38 ± 10 41 ± 11
(p=0.04)		 39 ± 9
(p=0.15)		 42 ± 8
(p=0.04)		 39 ± 8
(p=0.01)
Propofol
N=29		 42 ± 11 42 ± 13
(p=0.86)		 40 ± 11
(p=0.23)		 42 ± 10
(p=0.18)		 41 ± 10
(p=0.27)
Desflurane
N=26* 		34 ± 7 40 ± 8
(p=0.04)		 39 ± 4
(p=0.40)		 41 ± 6
(p=0.03)		 38 ± 5
(p<0.01)

BIS = Bispectral index; Fio2 = Fraction of inspired oxygen; Petco2 = partial pressure of end-tidal carbon dioxide

*

One patient with missing BIS data.

P-values represent comparison of successive set points within anesthetic type (ie: Set Point 1 compared to Set Point 2, Set Point 2 compared to Set Point 3, etc).