Efficacy and Safety of Interwoven Self-Expandable Nitinol Stent for Femropopliteal Arterial Occlusive Diseases

Efficacy and Safety of Interwoven Self-Expandable Nitinol Stent for Femropopliteal Arterial Occlusive Diseases

Interwoven self-expandable stent is a recent endovascular method to treat complex femoropopliteal lesions trying to reach a reasonable patency and durability like in surgical bypass.

Stenting of the femoro-popliteal segment is indicated in case of elastic recoil, flow-limiting dissection, insufficient per- cutaneous transluminal angioplasty (PTA) or long lesion length. However, in-stent restenosis (ISR) or fracture after endovascular treatment remains a serious concern, especially for lesions of a long segment or near the knee joint. Besides the current availability of covered or drug-coated stents, there is the self-expandable bare-metal Nitinol stent which rapidly evolved during the last decade from closed-cell to open-cell and, more recently, to interwoven stents. interwoven nitinol stent design of fully connected structures facilitates a continuous but a traumatic synergy between the stent and vessel wall and hence enables axial compliance. Investigators here conduct a prospective study to evaluate the efficacy and safety of self- expandable nitinol stent especially interwoven supera stent (IW; Supera Veritas®; Abbott Vascular, Santa Clara, CA, USA) in femoropopliteal complex occlusive lesions.

Inclusion criteria:

• Patients with critical limb ischemia(grade 4,5&6 Rutherford classification) and patients with disabling claudications which interferes with routine activities (grade 3 Rutherford classification).
• Patients with chronic total occlusion(CTO) of femoropopliteal segment which is equal or beyond 10 centimeters length.
• Patients with recoil after transluminal angioplasty or occlusion in previously deployed stent.
• If the lesion extends to popliteal artey against knee flexion.

Exclusion criteria:

• Pediatric patients.
• Patients with isolated infra-popliteal occlusion.
• Patients with popliteal blind segment with bad runoff.
• Patients with acute thrombotic occlusions.
• Patients with previous bypass surgery in affected limb.
• Patients with aneurysmal lesion in the affected limb.