A permanently implanted vascular device intended to be percutaneously placed in the inferior vena cava (IVC) to prevent pulmonary embolism (PE). The device achieves its unconstrained diameter upon deployment in the IVC and imparts an outward radial force on the luminal surface of the vena cava to ensure proper positioning and stability. It is designed for blood clot capture while maintaining caval patency. It is made of metal alloys [e.g., stainless steel, titanium (Ti), nickel-titanium alloy (Nitinol)] and is available in various self-expanding, wire designs (e.g., conical, basket).