{"data":{"id":"us/21-cfr-874.1925","jurisdiction":"us","citation":"21 CFR 874.1925","heading":"Toynbee diagnostic tube.","body":"(a) Identification. The toynbee diagnostic tube is a listening device intended to determine the degree of openness of the eustachian tube.\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 § 874.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 874—EAR, NOSE, AND THROAT DEVICES","Subpart B—Diagnostic 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":"b76d0777f1b3fc17e559f1c1364e44ab64fe64e073e4abffda58931c3358eb8e","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-874.1820","next":"us/21-cfr-874.3300"},"notice":"GroundRules: Original legal text. Not legal advice."}