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AVF classification of endothermal heat-induced thrombosis[1]

AVF classification of endothermal heat-induced thrombosis[1]
Class I: Thrombus without propagation into the deep vein
  1. Peripheral to superficial epigastric vein
  2. Central to superficial epigastric vein, up to and including the deep vein junction

Class II: Thrombus propagation into the adjacent deep vein but comprising <50% of the deep vein lumen

Class III: Thrombus propagation into the adjacent deep vein but comprising >50% of the deep vein lumen

Class IV: Occlusive deep vein thrombus contiguous with the treated superficial vein
AVF: American Venous Forum; EHIT: endothermal heat-induced thrombosis; DVT: deep vein thrombosis.
Reference:
  1. Kabnick LS, Sadek M, Bjamason H, et al. Classification and treatment of endothermal heat-induced thrombosis: Recommendations from the American Venous Forum and the Society for Vascular Surgery. J Vasc Surg Venous Lymphat Disord 2021: 9:6.
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