Calculating the frequency shift of a particular sample volume, such a blood flow through an artery in the neck. Each major vein has a characteristic blood flow which can be recorded. If a narrowing of the artery is present, blood flow increases which can be detected by a hissing sound during the examination. Blood flow in pre and post stenotic veins can also have directional changes which affect the patient. Blockage in the blood flow also changes the profile. The artery itself cannot be visually examined.
Blood flow in the following arteries can be examined:
Blood flow in the following arteries can be examined:
- Arteria carotis communis, Arteria carotis interna
- Arteria carotis externa, Arteria vertebralis
- Arteria subclavia, Arteria supratrochlearis