Lower extremity venous thrombus aspiration and removal requires the use of a contrast agent, which is needed to visualize the location of the thrombus. Thrombus aspiration is currently the most advanced method of thrombus removal, mainly applied to peripheral arterial and venous acute, subacute thrombus removal, especially for the treatment of lower extremity deep vein thrombosis. Angiographic agent can directly see the site of thrombus, puncture into the blood vessel with thrombus, can be contrasted by the specific location of the thrombus, the guidewire will be sent to the location of the thrombus, can be carried out locally to remove the thrombus or thrombolytic therapy, the end of the procedure puncture site needs to be pressurized for 6 to 8 hours. This situation is recommended to go to the regular hospital in a timely manner, under the guidance of a professional doctor for treatment, do not delay the condition to miss the best treatment period.