Optimizing Venous Stenting: Trials, Design and Complications

C-TRACT Trial and Enrollment Challenges

The multicenter C-TRACT trial randomizing post-thrombotic patients to iliac stenting or conservative therapy remained well under its enrollment target, hampered by pandemic related loss of research coordinators and reluctance of endovascular providers to refer patients outside their own practice.

Stent Type, Inflow, and Anticoagulation

A 209 patient comparison found no meaningful patency difference between open and closed cell stents, with inflow disease as the dominant predictor of failure, while a separate series found direct oral anticoagulants carried a higher early thrombosis rate than low molecular weight heparin after recanalization.

Classifying Chronic Venous Obstruction by Inflow

A proposed five type classification grading femoral and deep femoral vein involvement, validated across roughly a thousand limbs, found twelve month patency fell from about 90 percent with good inflow to near zero by four years with severe inflow disease.

Stent Erosion and Next Generation Design

A case series described stent erosion and separation when stents landed within pelvic curves rather than crossing them fully, and closing remarks proposed next generation stents with higher porosity, adjustable length, and greater flexibility to improve healing.