21 CFR 870.2880 - Ultrasonic transducer.
(a) Identification. An ultrasonic transducer is a device applied to the skin to transmit and receive ultrasonic energy that is used in conjunction with an echocardiograph to provide imaging of cardiovascular structures. This device includes phased arrays and two-dimensional scanning transducers.
Title 21 published on 2014-04-01
no entries appear in the Federal Register after this date.