the location of steno-occlusions, the existence of diabetes mellitus, and the history of central catheter. Results: Stents were implanted in 294 patients in 1016 procedures. All but one of the procedures was technically successful (99.7%). The one patient with an unsuccessful procedure was due to incomplete stent expansion. Two stent migrations were occurred as major complication without other. The primary patency rate for 6, 12, 24, and 36 months was 44%, 18%, 5%, and 2%, respectively (mean: 7.9 months). Repeat interventions, including additional balloon angioplasty and stent placement, were required in 172 patients (average: 2.54). There was no statistic difference except the history of central catheter (P = 0.0128). The secondary patency rate for 6, 12, 24, 36, 48, and 60 months was 80%, 67%, 42%, 37%, 30%, and 20%, respectively. Conclusion: Percutaneous central venous stent implantation in hemodialysis patients is useful in patients with suboptimal angioplasty and it was safe and effective to restore the hemodialysis function. However, repeat interventions are usually required to prolong the stent patency.

arteriomegaly rather than an atheromatous disease. Once the diagnosis is made and the indication retained, the patients had to be treated to prevent the complications caused by this type of lesions. This poster illustrates some cases of popliteal aneurysms treated with endovascular technique successfully in our department. Methods: We performed a single-center retrospective cohort study of 11 patients who underwent stenting of the popliteal artery for aneurysmal diseases of lower limbs between January 2010 and October 2017. Clinical improvement, permeability, stent thrombosis, intra-stent stenosis, and stent fracture were evaluated. Results: Eleven patients were treated for aneurysmal lesions of the popliteal artery, including 2 false aneurysms and 9 aneurysms. All our patients evolved well postoperatively. Clinical improvement was observed in all patients: no fracture or stent disconnection with aneurysms, without endoleak. One patient presented stent thrombosis after 2 years of follow-up. Conclusion: it seems reasonable to think that endovascular repair should be considered, case by case, as an alternative for open repair of popliteal artery's aneurysms. The technical improvements of covered endoprostheses and prospective studies gathering multiple observations will allow in future to affirm the interest of this treatment.