Whether a thrombus filter is removed or not depends mainly on how well the condition is controlled, if it is well controlled it is recommended to remove it, if it is not well controlled it needs to be kept in place. Venous thrombosis is a common disease in clinical practice, which occurs in patients who are bedridden for a long period of time after surgery, the most common being deep vein thrombosis of the lower limbs, and the thrombus filter is designed to prevent the venous thrombus from dislodging and returning with the blood to the pulmonary arteries, which may lead to pulmonary embolism and jeopardize the patient’s life. For patients whose condition is well controlled, it is generally recommended that the filters be removed after two weeks; if the patient’s condition is still poorly controlled after various treatments, they will need to continue to be placed. Whether to take or not to take out the thrombus filter, it is recommended that the patient go to a regular hospital to consult a doctor and make a decision after clarifying his or her condition.