Kabnick classification of endovenous heat-induced thrombus^[1]

Class 1: Venous thrombosis to the superficial-deep junction (ie, saphenofemoral junction or saphenopopliteal junction), but not extending into the deep system.
Class 2: Nonocclusive venous thrombosis into the deep venous system (ie, DVT), with an extension into the deep system of a cross-sectional area of less than 50 percent.
Class 3: Nonocclusive venous thrombosis into the deep venous system (ie, DVT), with an extension into the deep system of a cross-sectional area of greater than 50 percent.
Class 4: Occlusive DVT.

EHIT: endovenous heat-induced thrombus; DVT: deep venous thrombosis.

Reference:

Kabnick LS. Thrombus at the SFJ after endovenous ablation: What should I do now? Third International Vein Congress: In-office Techniques. Miami, FL 2005.

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Kabnick classification of endovenous heat-induced thrombus[1]