title: Angioplasty and stent placement in chronic occlusion of the superficial femoral artery: technique and results.
abstract: OBJECTIVE
  To improve the patency rate for angioplasty in chronic occlusion of the superficial femoral artery by deploying stents after angioplasty.
  
  
  METHODS
  Angioplasty and stent placement were performed in 61 arteries in 48 male patients. The mean occlusion length was 13.5 cm and the mean stent length was 30 cm. Patency rates were analyzed at 6 months and at 1, 2, 3, and 4 years. The predictors of restenosis were analyzed by univariate and multiple logistic regression.
  
  
  RESULTS
  Patency rates were 87% at 6 months, consisting of 74% primary, 6% primary assisted, and 7% secondary; 79% at 1 year, consisting of 47% primary, 19% primary assisted, and 13% secondary; 72% at 2 years, consisting of 36% primary, 26% primary assisted, and 10% secondary; 70% at 3 years, consisting of 26% primary, 22% primary assisted, and 22% secondary; and 63% at 4 years, consisting of 25% primary, 0% primary assisted, and 38% secondary. There was a 15% morbidity rate and one mortality as a result of retroperitoneal bleeding. Better patency rates were noted at all time intervals in diabetic limbs, 7-mm-diameter versus 10-mm-diameter stents, shorter obstructions and shorter stents, nonsmokers, in limbs in which urokinase was not necessary after stent deployment, and in limbs with an International Society of Cardiovascular Surgery (ISCVS) classification under 3. Patency rates were not affected by age, race, number of trifurcation vessels patent, experience in performing the procedures, and procedures requiring less time. By multivariate logistic analysis, the independent predictors of patency at 6 months were postprocedure ankle/brachial index (ABI) and shorter stent length; at 1 year, preprocedure ABI, shorter stent length, and the presence of diabetes; at 2 years, preprocedure ABI and the presence of diabetes; and at 3 years, the preprocedure ABI.
  
  
  CONCLUSIONS
  The techniques used to reestablish antegrade flow in these superficial femoral arteries yielded a high success rate. In addition, the use of angioplasty with stents may improve patency rates over angioplasty without stents.
authors.affiliation: Department of Radiology, Veterans Administration Medical Center, Long Beach, CA 90822, USA. robert.conroy@med.va.gov
authors.forename: R M
authors.initials: RM
authors.lastname: Conroy
authors.forename: I L
authors.initials: IL
authors.lastname: Gordon
authors.forename: J M
authors.initials: JM
authors.lastname: Tobis
authors.forename: T
authors.initials: T
authors.lastname: Hiro
authors.forename: S
authors.initials: S
authors.lastname: Kasaoka
authors.forename: E A
authors.initials: EA
authors.lastname: Stemmer
authors.forename: S E
authors.initials: SE
authors.lastname: Wilson
mesh_terms: D000328:Adult; D000368:Aged; D000792:Angiography; D017130:Angioplasty / Q000379:methods*; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging / Q000628:therapy*; D016009:Chi-Square Distribution; D005263:Femoral Artery / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D016015:Logistic Models; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015607:Stents; D016896:Treatment Outcome; D014654:Vascular Patency