title: Analysis of endovascular therapy for femoropopliteal disease with the Supera stent.
abstract: The structural limitations of currently available laser-cut nitinol stents in the highly diseased arterial system of the lower extremity are well described. These devices are frequently used in long-segment occlusions, at the adductor hiatus, and across the knee into the popliteal artery and tibial-peroneal trunk despite concerns related to the high mobility of the knee joint and the potential for external stent compression, fractures, and occlusion. The Supera stent (Abbott Vascular, Santa Clara, Calif) was developed to provide superior radial strength, fracture resistance, and flexibility compared with laser-cut nitinol stents. This study represents the initial U.S. experience in the management of lower extremity artery atherosclerotic disease with the Supera interwoven wire stent.
  
  
  
  Patients undergoing stent implantation in the 20-month period after the 2008 Food and Drug Administration clearance were included. Medical records, radiographic imaging, and procedural data were examined. Procedural angiograms were classified according to TransAtlantic Inter-Society Consensus criteria. Patency and limb loss rates were calculated using Kaplan-Meier analysis.
  
  
  
  There were 305 stents implanted in 147 patients. Clinical follow-up was a mean of 12.7 months (range, 0.2-33.7 months), and radiologic follow-up was a mean of 8.4 months (range, 0.2-26.8 months). Most patients had critical limb ischemia, with tissue loss (38.1%) or rest pain (28.6%) as the indication for intervention. Of the 147 patients, 75 (51.02%) underwent a concomitant adjunctive procedure in the treated extremity. Primary, assisted primary, and secondary patency rates at 12 months by duplex ultrasound imaging were 89.8%, 91.2%, and 93.2%, respectively, by Kaplan-Meier estimates, with a mean lesion length of 184.5 ± 131.80 mm and mean stented length of 197.5 ± 113.65 mm. Seventeen patients experienced an event requiring successful reintervention in the stented segment (13 for type I or II restenosis; four for type III). There were eight major amputations, with five of those eight having a patent stent at the time of limb sacrifice. The overall mortality was 11.6% during the study period. Knee radiography was performed in 47 patients with devices extending into the popliteal and tibial-peroneal segment, and no stent fractures were identified.
  
  
  
  Stenting of the superficial femoral and popliteal arteries using the Supera stent system appears to be safe and effective. The interwoven stent design may better serve areas under extreme mechanical stress. Our results with this population of highly diseased patients including very long lesion lengths are consistent with outcomes of other publications reporting the use of this device.
authors.affiliation: University of Arizona Health Science Center, Tucson, Ariz; Pima Vascular Group, Tucson, Ariz. Electronic address: montero.bkr@gmail.com.
authors.forename: Miguel
authors.initials: M
authors.lastname: Montero-Baker
authors.affiliation: Pima Vascular Group, Tucson, Ariz.
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Ziomek
authors.affiliation: Pima Vascular Group, Tucson, Ariz; Department of Vascular and Endovascular Surgery at Tucson Medical Center, Tucson, Ariz.
authors.forename: Luis
authors.initials: L
authors.lastname: Leon
authors.affiliation: University of New Mexico, Albuquerque, NM.
authors.forename: Aaron
authors.initials: A
authors.lastname: Gonzales
authors.affiliation: Pima Vascular Group, Tucson, Ariz.
authors.forename: Robert S
authors.initials: RS
authors.lastname: Dieter
authors.affiliation: Department of Vascular and Endovascular Surgery at Tucson Medical Center, Tucson, Ariz.
authors.forename: Crystal L
authors.initials: CL
authors.lastname: Gadd
authors.affiliation: Pima Vascular Group, Tucson, Ariz; Department of Vascular and Endovascular Surgery at Tucson Medical Center, Tucson, Ariz.
authors.forename: John P
authors.initials: JP
authors.lastname: Pacanowski
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000497:Alloys; D000671:Amputation, Surgical; D001130:Arizona; D016638:Critical Illness; D057510:Endovascular Procedures / Q000009:adverse effects / Q000295:instrumentation* / Q000401:mortality; D005260:Female; D005263:Femoral Artery / Q000000981:diagnostic imaging / Q000503:physiopathology; D006801:Humans; D007383:Intermittent Claudication / Q000000981:diagnostic imaging / Q000401:mortality / Q000503:physiopathology / Q000628:therapy*; D007511:Ischemia / Q000000981:diagnostic imaging / Q000401:mortality / Q000503:physiopathology / Q000628:therapy*; D053208:Kaplan-Meier Estimate; D023821:Limb Salvage; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D058729:Peripheral Arterial Disease / Q000000981:diagnostic imaging / Q000401:mortality / Q000503:physiopathology / Q000628:therapy*; D011150:Popliteal Artery / Q000000981:diagnostic imaging / Q000503:physiopathology; D016016:Proportional Hazards Models; D011446:Prospective Studies; D011474:Prosthesis Design; D012042:Registries; D019233:Retreatment; D012307:Risk Factors; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency
chemical_list: D000497:Alloys; C013616:nitinol