Table 1
Internal jugular vein (IJV) diameter at various angles of Trendelenburg tilt
Trendelenburg angle
Mean IJV diameter(mm)
95% CI
Range
0
13.5
12.8 to 14.1
9.9–23.5
10
15.5
14.9 to 16.1
11.2–25.7
15
15.5
14.8 to 16.1
10.7–26.2
20
16.4
15.7 to 17.0
10.9–28.2
25
16.7
16.1 to 17.4
11.7–25.4
30
16.7
16.1 to 17.4
10.9–26.5