Intravascular [ultrasound] imaging of blood vessels. Note: real-time imaging of lumen of blood vessel(s) using sound waves. Code also any synchronous diagnostic or therapeutic procedures. Excludes: adjunct vascular system procedures, number of vessels treated (00.40-00.43) diagnostic procedures on blood vessels (38.21-38.29)
Video: Separation of Powers: Definition & Examples. Separation of powers is the distribution of political authority within a government. Learn more about how separation of power works in the United States, then check your understanding of this topic with a quiz.
Separation of powers under the United States Constitution - Executive power. 1  Executive power is vested, with exceptions and qualifications, [1] in the President. 2  Congress often writes legislation to restrain executive officials to the performance of their duties, as laid out by the laws Congress passes.