ANATOMY
EXTRACRANIAL HEAD AND NECK
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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> 2.0
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2.0-4.0
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< 2.0
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> 4.0
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Detailed explanation-1: -Conclusion: The PSVICA/CCA ratio can be used for detecting internal carotid artery angiographic stenosis. PSVICA/CCA ratios of 1.2, 1.8, and 2.2 are proper criteria for interpreting 50%≤, 60%≤ and 70%≤ stenosis, respectively.
Detailed explanation-2: -"Moderate stenosis” was defined as an ICA peak systolic velocity (PSV) ≥120 cm/s and a diastolic ICA velocity <140 cm/s.
Detailed explanation-3: -Doppler velocity ratios for ICA/CCA are 0.4 to 0.7 for normal vessels910; in the assessment of carotid atheroma, a velocity ratio >1.5 is considered significant for stenosis >50%. In the development of CSI, we have adopted the ICA/CCA ratio of 1:1.2.
Detailed explanation-4: -Mean diameters of ICA (4.66±0.78 mm) and CCA (6.10±0.80 mm) in women were significantly smaller than in men: 5.11±0.87 mm and 6.52±0.98 mm, respectively. Sex significantly influenced the diameters after controlling for body size, neck size, age, and blood pressure.