21 CFR 874.1925 - Toynbee diagnostic tube.
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(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 subpart E of part 807 of this chapter subject to § 874.9.
[51 FR 40389, Nov. 6, 1986, as amended at 65 FR 2316, Jan. 14, 2000]
Title 21 published on 2014-04-01.
No entries appear in the Federal Register after this date, for 21 CFR Part 874.