{"data":{"id":"us/21-cfr-880.6970","jurisdiction":"us","citation":"21 CFR 880.6970","heading":"Liquid crystal vein locator.","body":"(a) Identification. A liquid crystal vein locator is a device used to indicate the location of a vein by revealing variations in the surface temperature of the skin by displaying the color changes of heat sensitive liquid crystals (cholesteric esters).\n(b) Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter, subject to the limitations in § 880.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 880—GENERAL HOSPITAL AND PERSONAL USE DEVICES","Subpart G—General Hospital and Personal Use Miscellaneous Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"d6a118cb671024e5bdf79a111b4e3aec5964597e14c40f9e02511fc9438b3b17","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-880.6960","next":"us/21-cfr-880.6980"},"notice":"GroundRules: Original legal text. Not legal advice."}