In this add–on procedure, the provider inserts a specially designed catheter with an ultrasound transducer, a device that sends high–frequency sound waves through the tissues and detects their returning echoes to provide information about the underlying structures, into the vessel and examines its interior during a diagnostic or interventional therapeutic procedure, such as stent placement to treat an obstruction or blockage. This procedure is for the first vessel that is not a heart vessel (noncoronary) and includes radiologic supervision and interpretation of the intravascular ultrasound.
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