[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR874.1925] [Page 349-350] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 874--EAR, NOSE, AND THROAT DEVICES--Table of Contents Subpart B--Diagnostic Devices Sec. 874.1925 Toynbee diagnostic tube. (a) Identification. The toynbee diagnostic tube is a listening device intended to determine the degree of openness of the eustachian tube. (b) Classification. Class I (general controls). The device is exempt from the premarket notification procedures in [[Page 350]] subpart E of part 807 of this chapter subject to Sec. 874.9. [51 FR 40389, Nov. 6, 1986, as amended at 65 FR 2316, Jan. 14, 2000] Subpart C [Reserved]