Endovascular therapy for chronic venous thrombosis (formation of a blood clot) in the iliac vein or inferior vena cava focuses on restoring the patency (unobstructed state) of the vein by means of thrombolysis (removing the clot), angioplasty (expanding the narrowed vein with a balloon), and/or placement of a stent (device placed to keep the vein open) within the vessel. This reconstruction is carried out within the vessel (endovascular).

The iliac vein is a deep vein located above the hip area; the inferior vena cava is a deep vein that runs through the midsection.

The most important gauge of therapeutic success in endovascular reconstruction is improved daily existence.

When a patient has an iliac or caval obstruction, insertion of the catheter into the vein in the groin and insertion behind the knee (the popliteal vein) are the usual approaches.