title: Efficacious use of nitinol stents in the femoral and popliteal arteries.
abstract: OBJECTIVE
  To evaluate the performance and identify predictors of outcome after the use of self-expanding nitinol stents in the treatment of femoropopliteal arterial occlusive disease.
  
  
  METHODS
  A retrospective analysis of a prospectively collected database was performed. Outcomes of patients who underwent placement of a nitinol stent in the femoral or above-knee popliteal arteries between 1999 and 2002 were studied. Patency, limb salvage, and patient survival were determined by Kaplan-Meier estimation and intergroup comparisons by log-rank test and Cox proportional hazards model. To define individual factors associated with clinical outcomes, stepwise regression analysis was performed.
  
  
  RESULTS
  A total of 41 patients (mean age, 70 +/- 10 years; gender, 26 men and 15 women) underwent percutaneous placement of nitinol stents. Limb salvage was the indication for intervention in 68% of patients. Diabetes was present in 54%, and 36% had end-stage renal disease. Nitinol stents were placed in the superficial femoral (35 patients) or the above-knee popliteal (6 patients) arteries. The mean postprocedural increase in ankle-brachial index was 0.32 +/- 0.19. The 6-month, 1-year, and 2-year primary patency and limb-salvage rates were 95%, 84%, and 84%, and 92%, 89%, and 89%, respectively. Major amputations occurred only in patients undergoing limb-salvage procedures presenting with major tissue loss. No statistically significant differences in patency were seen with regard to diabetes, end-stage renal disease, runoff score, length of vessel stented (median, 80 mm), hypertension, or smoking.
  
  
  CONCLUSIONS
  Our initial experience with self-expanding nitinol stents for femoropopliteal occlusive disease appears to demonstrate acceptable patency and limb-salvage rates at these early time points. Further evaluation of clinical outcome with these devices in this and larger groups of patients is warranted.
authors.affiliation: Division of Vascular Surgery, UMDNJ-New Jersey Medical School, New Brunswick, NJ 08903, USA.
authors.forename: Todd R
authors.initials: TR
authors.lastname: Vogel
authors.forename: Larry E
authors.initials: LE
authors.lastname: Shindelman
authors.forename: Gary B
authors.initials: GB
authors.lastname: Nackman
authors.forename: Alan M
authors.initials: AM
authors.lastname: Graham
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000497:Alloys; D001157:Arterial Occlusive Diseases / Q000503:physiopathology / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation; D005260:Female; D005263:Femoral Artery / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011150:Popliteal Artery / Q000503:physiopathology / Q000601:surgery*; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D015607:Stents; D016896:Treatment Outcome; D014654:Vascular Patency / Q000502:physiology
chemical_list: D000497:Alloys; C013616:nitinol