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DVT398-AH1
USIDMS Extracranial Carotid
Question | Answer |
---|---|
What is Eddy flow? | Color swirl of red and blue |
What are the two types of stroke? Which is more common? | Ischemic- more common and hemorrhagic |
What are the four stages of plaque formation? | ESIP Endothelial injury, Sub-endothelial lipid deposit, Inflammation response (smooth muscle proliferation), and Plaque formation |
What are the five terms that can describe plaque? | Extent of plaque, severity, echogenicity, complicated plaque, smooth plaque |
What are examples of low resistant flow vessels? | ICA, renal artery, intracranial vessels |
What are examples of high resistant vessels? | ECA and extremity vessels |
Sonographically, how can the ECA and ICA be distinguished? | ICA is low resistant waveform, usually larger in diameter, only contains intracranial branches ECA is high resistant waveform, smaller in diameter, contains extracranial branches |
What does tardus parvus describe? | low velocity flow with delayed acceleration |
What is the first branch off of the ECA? | Superior thyroid artery |
How much of a difference in mmHG is a red flag for subclavian steal? | 20 mmHg |
What are the three forms of aneurysms? | Fusiform, saccular, and dissecting |
What causes pseudoaneurysms? | Vessel trauma |
What is a small ovular structure that can develop in the carotid bifurcation? | Carotid Body Tumor |
What is the overgrowth of smooth muscle and fibrous tissue in the arterial wall? | Fibromuscualr dysplasia |
What is the intimal thickening with plaque or FMD? | Neointimal hyperplasia |
What layers of a vessel are affected with arterial dissection? | Initma and media |