. Author manuscript; available in PMC: 2009 Oct 1.

Published in final edited form as: Anesthesiology. 2008 Oct;109(4):605–612. doi: 10.1097/ALN.0b013e31818709fa

Table 4.

Distance of Genu of Mandible and Hyoid Bone from the Vertebral Bodies and Hard Palate on Midline Sagittal MRI

		Awake	Anesthesia No Advancement	Anesthesia 50% Advancement	Anesthesia Max Advancement
Distance to Vertebral Bodies (mm)	Genu of Mandible	66.3 ± 8.9	60.9 ± 8.5^*	65.0 ± 9.8	70.9 ± 9.5^*
Distance to Vertebral Bodies (mm)	Hyoid Bone	35.9 ± 7.2	30.6 ± 5.9	33.0 ± 4.9	35.7 ± 4.8
Distance to Hard Palate (mm)	Genu of Mandible	67.6 ± 6.0	67.0 ± 7.8	67.8 ± 5.8	68.9 ± 6.1
Distance to Hard Palate (mm)	Hyoid Bone	71.9 ± 6.7	74.7 ± 8.9	71.8 ± 6.0	73.4 ± 4.4

Data are mean ± SD; MRI = magnetic resonance imaging.

paired t-test versus awake p ≤ 0.05