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Table 2 Common Femoral Vein Area (mm2) in supine vs. prone positioning and dehydration vs. hydration status in 8 volunteers

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
P value 0.02 0.0007