When is an IVC filter necessary for surgery? My daughter is having surgery to remove a paraganglomia near her liver. My daughter has a blood clotting discorder of factor 5 and low protein s. She has not had any clots nor is she on any blood thinning medicine. Her father has a blood clotting disorder and is on coumidin to regulate it. The surgeon is suggesting heprin after surgery and then lovenox for 21 or 28 days. Is this appropriate?

Summarized question: Is an IVC filter necessary for a paraganglioma removal?