Riles classification

riles_classification.jpg

Type 1A involves a patent ICA and ECA

Type 1B a patent ECA and an occluded ICA

Type 1C a patent ICA and an occluded ECA

Type 2 involves a total CCA, ICA and ECA occlusion 1).

1)
Riles TS, Imparato AM, Posner MP, Eikelboom BC. Common carotid occlusion. Assessment of the distal vessels. Ann Surg. 1984 Mar;199(3):363-6. PubMed PMID: 6703797; PubMed Central PMCID: PMC1353406.