Where is an IVC filter typically placed relative to the renal veins?

Where is an IVC filter typically placed relative to the renal veins?

• A. 2-3 cm below the lowest renal vein
• B. Above the highest renal vein
• C. At the confluence of the iliac veins
• D. At the level of the diaphragm

Answer: (A)

Placement of an IVC filter is done infrarenally, positioned in the abdominal IVC just below the renal veins. Placing it about 2–3 cm beneath the lowest renal vein keeps the renal venous outflow unobstructed while still capturing emboli from the legs and pelvis. If the filter were placed higher, above the renal veins, it could obstruct renal inflow and risk renal complications. Placing at the iliac confluence or at the level of the diaphragm would be too far distal or too high, respectively, and would not optimize capture of emboli from the lower body or could cause other flow-related issues.

Placement of an IVC filter is done infrarenally, positioned in the abdominal IVC just below the renal veins. Placing it about 2–3 cm beneath the lowest renal vein keeps the renal venous outflow unobstructed while still capturing emboli from the legs and pelvis. If the filter were placed higher, above the renal veins, it could obstruct renal inflow and risk renal complications. Placing at the iliac confluence or at the level of the diaphragm would be too far distal or too high, respectively, and would not optimize capture of emboli from the lower body or could cause other flow-related issues.