Why does increased venous pressure in leg veins, such as in varicose veins, often lead to edema in the ankles?

💡 Explanation

Elevated venous pressure increases capillary hydrostatic pressure, promoting fluid filtration into the interstitial space. Because the lymphatic system's capacity to remove this excess fluid is exceeded, edema results; therefore, increased filtration exceeds drainage, rather than reduced lymphatic vessel permeability or altered oncotic pressure being the primary drivers.

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