Quantitative Prediction of the Location of Carotid Bifurcation and Neurovascular Structures in the Carotid Region: A Cross-Sectional Cadaveric Study
Table 3
Summary of left vs. right comparison of normalized carotid ratios.
95% CI for mean difference
Normalized distance ratios ()
Left
Right
Mean difference
SE difference
Lower
Upper
MBC to angle of mandible
0.571
-1.889
0.016
-0.024
0.042
MBC to stylohyoid m.
0.589
-2.185
0.014
-0.021
0.036
MBC to carotid bifurcation ‡
<.001
11.410
0.011
0.068
0.113
MBC to STA
<.001
8.529
0.006
0.062
0.087
MBC to facial vein
<.001
13.879
0.007
0.091
0.121
MBC to CN XII
<.001
12.528
0.008
0.082
0.115
Bifurcation to stylohyoid m.
<.001
4.356
0.005
0.019
0.039
Bifurcation to facial vein
0.178
-0.679
0.003
-0.011
0.002
Bifurcation to ECA/ICA
0.279
-2.527
0.010
-0.033
0.010
Bifurcation to CN XII
0.005
-3.091
0.005
-0.026
-0.005
Bifurcation to SLN
0.334
1.183
0.010
-0.011
0.032
MBC to ; ratios normalized individually by cadaver specific distances. ‡ Used in final model to predict bifurcation height. MBC: medial border of the clavicle; STA: superior thyroid artery; CN XII: hypoglossal nerve; ECA/ICA: point above the bifurcation where the external-internal carotid artery crossover occurs; SLN: superior laryngeal nerve.
