Remote Endarterectomy and Lamina Vastoadductoria Dissection Improves Superficial Femoral Artery Biomechanical Behavior during Limb Flexion.

BACKGROUND: Superficial femoral artery (SFA) remote endarterectomy offers the advantage of preserving anatomy and geometry of the native artery, but the risk of restenosis still exists. The particular role of the adductor canal (AC) in mechanical constraints has been highlighted. The aim of this study was to assess if a surgical protocol associating remote SFA endarterectomy and AC freeing would modify the SFA geometrical changes during physiological limb flexion.

METHODS: From January 2015 to March 2015, 10 patients (Rutherford 3-5) with unilateral SFA occlusion were included. Functional postoperative assessments were performed through duplex ultrasound (DUS) examinations with flow velocity measurements in both straight and flexed positions and anatomical measurements through 3-dimensional computed tomography angiography (CTA) reconstructions with arterial angulations examination. Functional results were compared with similar findings in healthy volunteers, and anatomical results were compared with contralateral limb findings.

RESULTS: Mean occlusion length was 243.0 ± 17.7 mm. Technical success was achieved in all cases. No difference of peak flow velocities was noticed between operated patients and volunteers. CTA results showed that limb flexion induced SFA shortening in all segments, with a maximal value for the popliteal artery (PA) (10.4 ± 4.4%). Comparisons between the operated and contralateral limbs showed that angles were less sharp during bending in the operated limb.

CONCLUSIONS: This preliminary study demonstrates that freeing the AC modifies the biomechanical properties of the SFA. These results could potentially help in proposing future hybrid techniques that could improve technical performances for SFA occlusive disease treatment.