title: Twelve-month results of the EverFlex stent in the superficial femoral artery.
abstract: OBJECTIVE
  To evaluate the clinical efficacy of EverFlex stents (length, 6-20 cm) for the treatment of peripheral artery disease (PAD) in the superficial femoral artery (SFA).
  
  
  METHODS
  Over a period of 18 months, 56 SFA lesions in 53 patients were treated with an EverFlex stent. The following parameters were documented before the intervention, immediately afterward, and 12 months later: clinical stage, ankle-brachial index, and peak systolic velocity ratio (PSVR). The primary study endpoint was the primary patency rate after 12 months (defined as a PSVR < 2.5).
  
  
  RESULTS
  In 18% of the 56 lesions, complete occlusions were present. Mean lesion length was 9.4 cm ± 5.3, and mean stent length was 12.6 cm ± 5.6. Of the 53 patients enrolled in the study, a 12-month follow-up was performed in 46. The primary patency rate after 12 months was 71.7%. In-stent restenosis or occlusion occurred in 13 patients. Compared with the total study group, the mean stent length in these 13 patients was greater (14.0 cm ± 7.3) and the incidence of de novo lesions was lower. In the patient group with stents less than 10 cm in length (n = 24), six patients (25%) required a repeat intervention, compared with seven patients (32%) in the group with stents longer than 12 cm.
  
  
  CONCLUSIONS
  Although the primary patency rate associated with the EverFlex stent is comparable to those in published data, the present results demonstrate a higher percentage of in-stent stenoses in patients in whom longer SFA stents were implanted.
authors: Institute of Clinical Radiology and Nuclear Medicine, University Medical Centre Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany. steffen.diehl@umm.de
authors: Steffen J
authors: SJ
authors: Diehl
authors: Felix
authors: F
authors: Gerblich
authors: Susanne
authors: S
authors: Jochum
authors: Kurt
authors: K
authors: Huck
authors: Michael
authors: M
authors: Keese
authors: Stefan O
authors: SO
authors: Schoenberg
authors: Maliha
authors: M
authors: Sadick
mesh_terms: D000368:Aged; D000497:Alloys; D055109:Ankle Brachial Index; D001783:Blood Flow Velocity; D003251:Constriction, Pathologic; D057510:Endovascular Procedures / Q000009:adverse effects / Q000295:instrumentation*; D005260:Female; D005263:Femoral Artery / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D058729:Peripheral Arterial Disease / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D011474:Prosthesis Design; D012008:Recurrence; D012039:Regional Blood Flow; D012189:Retrospective Studies; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency
chemical_list: D000497:Alloys; C013616:nitinol