What are the benefits vs. risks detail in below :
Benefits

• No surgical incision is needed—only a small nick in the skin that does not have to be stitched.
• The filter has a high rate of success in protecting lungs from serious pulmonary embolus (PE) in patients who have failed conventional medical therapy or cannot be given conventional medical therapy.

Risks

• Any procedure where the skin is penetrated carries a risk of infection. The chance of infection requiring antibiotic treatment appears to be less than one in 1,000.
• There is a very slight risk of an allergic reaction if contrast material is injected.
• Any procedure that involves placement of a catheter inside a blood vessel carries certain risks. These risks include damage to the blood vessel, bruising or bleeding at the puncture site, and infection.However precaution is taken to mitigate these risks.
• There is a chance that the IVC filter can lodge in the wrong place, change position or penetrate through the vein (which can rarely lead to injury of a nearby organ).
• The IVC filter or a piece of the IVC filter may break loose and travel to the heart or lungs causing injury or death.
• Rarely, IVC filers become so filled with clots that they block all flow in the blood vessel, causing swelling in the legs.
• In some cases, retrievable filters become scarred to the vein and cannot be removed, in which case they are left in permanently (as they are also designed to do).