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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 subpart E of part 807 of this chapter subject to § 874.9.
Code of Federal Regulations
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