Unnecessary surgery is never a good idea, as it brings its own risks. Any time you are sedated, there is a risk you will never wake up. Not to mention the scarring, risk of infection, risk of complications, and future surgery. The fact that implanting an IVC filter might simply be an unnecessary surgery is a harm all by itself. And there is a mountain of evidence indicating that IVC filters are simply ineffective.
But the harms from IVC filters are much worse than unnecessary surgery. IVC filters can break apart and pieces can move through your veins and into your heart. IVC filters can puncture your veins and organs. The medical literature includes reports of sudden death, with no warning, at home. The list of possible adverse consequences is horrifying.
If you have had one of these devices implanted or removed, you are at risk for serious complications. Consulting a lawyer is just one part of your road to recovery.
More:
What is an IVC filter?
What is the evidence that IVC filters work?
Should I have my IVC filter removed?
Are IVC filters appropriate for bariatric (weight-loss) surgery patients?
Are IVC filters appropriate for trauma victims?
Can I sue the manufacturer of my IVC filter?
Can I sue my doctor for implanting an IVC filter?