What is the primary function of an IVC filter?

What is the primary function of an IVC filter?

• A. Prevent emboli from migrating to the heart and lungs
• B. Increase venous return from the legs
• C. Restore normal venous valve function
• D. Deliver chemotherapy

Answer: (A)

An IVC filter works as a mechanical barrier placed in the inferior vena cava to trap clots that form in the legs or pelvis before they can travel to the heart and then to the lungs. By catching these emboli, it prevents pulmonary embolism, which is the primary purpose of the device. It does not change venous return, it does not restore valve function, and it does not deliver chemotherapy. In practice, filters are used when anticoagulation is unsafe or insufficient, and many are retrievable if the patient’s risk factors change.

An IVC filter works as a mechanical barrier placed in the inferior vena cava to trap clots that form in the legs or pelvis before they can travel to the heart and then to the lungs. By catching these emboli, it prevents pulmonary embolism, which is the primary purpose of the device. It does not change venous return, it does not restore valve function, and it does not deliver chemotherapy. In practice, filters are used when anticoagulation is unsafe or insufficient, and many are retrievable if the patient’s risk factors change.