What term describes the mathematical process used to classify stenosis in ICA disease according to NASCET?

The term that describes the mathematical process used to classify stenosis in internal carotid artery (ICA) disease according to the NASCET (North American Symptomatic Carotid Endarterectomy Trial) criteria is based on the percentage of the minimal diameter. This method focuses on assessing the degree of narrowing in the artery by comparing the diameter of the stenotic segment to the diameter of a normal distal segment of the artery. By calculating the percentage reduction in the diameter at the site of the stenosis, clinicians can categorize the severity of stenosis accurately.

In NASCET, this percentage is crucial for determining the appropriate treatment and predicting the risk of future ischemic events. The approach specifically emphasizes the minimal diameter as a critical factor in evaluating stenosis and making clinical decisions. This method provides a standardized way to quantify stenosis severity, making it easier for healthcare professionals to communicate findings and compare results across studies or between patients.