CFR › Title 21 › Part 870 › §870.326021 CFR §870.3260Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A vena cava clip is an implanted extravascular device designed to occlude partially the vena cava for the purpose of inhibiting the flow of thromboemboli through that vessel.(b)Classification. Class II (performance standards).