Patient: Deep vein thrombosis of the lower extremities due to lumbar disease, treated with thrombolytic therapy, which was not effective. The onset of the disease is 40 days old and the treatment is 20 days old. Can it be treated surgically. A: Most of the patients with lower limb DVT do not need surgery. What is important is effective anticoagulation therapy and prevention of some sequelae caused by lower limb DVT. The affected limb will gradually open the collateral circulation, thrombus autolysis deep vein part recanalization, clinical symptoms will be relieved and improved.