CFR › Title 21 › Part 870 › §870.137021 CFR §870.1370Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A catheter tip occluder is a device that is inserted into certain catheters to prevent flow through one or more orifices.(b)Classification. Class II (performance standards).