As for the level at which the femoral vein is sectioned, the common femoral vessel, proximal to the profunda, for reasons already explained, must be preferred. Into this large vessel a smooth ...

the diameter of the vessel at the site of filter loop placement should be between 2.25–5.5 mm for coronary saphenous vein bypass graft procedures and between 3.5–5.5 mm for carotid procedures ...