title: Popliteal artery stenting using flexible tantalum stents.
abstract: OBJECTIVE
  To evaluate the safety and efficacy of stent therapy for the treatment of residual stenoses after percutaneous transluminal angioplasty (PTA) of popliteal stenoses and occlusions.
  
  
  METHODS
  In a prospective single-center study, flexible tantalum stents were implanted in 32 popliteal arteries for the treatment of residual stenosis greater than 50% after PTA of stenoses (n = 17) or occlusions (n = 15) in the P1 (n = 16), the P2 (n = 13), or both P1 and P2 segment (n = 3). Follow-up patency was assessed by clinical examination, ankle-brachial index, and color Doppler sonography or angiography.
  
  
  RESULTS
  Early stent thrombosis (10 days): 1 of 32 arteries (3%). 1-year and 2-year primary patency rate (PPR): 81% +/- 7.1% and 74% +/- 9.1%, respectively. 1-year PPRs for subgroups: stented stenoses versus stented occlusions: 88% +/- 7.8% vs 73% +/- 12.0%, p = 0.12; good lower limb runoff versus poor: 84.0% +/- 8.7% vs 76.0% +/- 12.4; p = 0.09; P1 versus P2: 77.3% +/- 9.8% vs 85.7% +/- 9.4%, p = 0.38. Recurrent PTA lesions treated with stents showed higher restenosis rate than de novo lesions.
  
  
  CONCLUSIONS
  The results of stent therapy of residual popliteal stenosis after PTA are encouraging and warrant further investigation.
authors.affiliation: Clinic of Imaging, Radiology, Nuclear Medicine, and Interventional Radiology, Diakonissenkrankenhaus, Diakonissenstrasse 28, D-76199 Karlsruhe, Germany. radiologie@diak-ka.de
authors.forename: E P
authors.initials: EP
authors.lastname: Strecker
authors.forename: I B
authors.initials: IB
authors.lastname: Boos
authors.forename: D
authors.initials: D
authors.lastname: Göttmann
authors.forename: S
authors.initials: S
authors.lastname: Vetter
authors.forename: W
authors.initials: W
authors.lastname: Haase
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000800:Angioplasty, Balloon; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging / Q000628:therapy*; D015331:Cohort Studies; D005260:Female; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011150:Popliteal Artery / Q000601:surgery*; D011446:Prospective Studies; D011859:Radiography; D015607:Stents; D013635:Tantalum; D014463:Ultrasonography
chemical_list: D013635:Tantalum