From: Pelvic cardiovascular magnetic resonance venography: venous changes with patient position and hydration status
Patient Position
Common Femoral Vein Area (mm2)
Dehydrated
Hydrated
P value
Supine
59 ± 21
78 ± 28
0.001
Prone
83 ± 35
123 ± 44
0.002
0.02
0.0007