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Table 3 Common Femoral Vein Area (mm2) in decubitus dependent vs. ante-decubitus positions for dehydration vs. hydration status in 8 volunteers

From: Pelvic cardiovascular magnetic resonance venography: venous changes with patient position and hydration status

Decubitus Position Common Femoral Vein Area (mm2)  
Dehydrated Hydrated P value
Dependent 134 ± 36 135 ± 32 0.95
Ante-dependent 29 ± 17 36 ± 22 0.27
P value < 0.0001 < 0.0001