title: Stent placement for chronic iliac arterial occlusive disease: the results of 10 years experience in a single institution.
abstract: OBJECTIVE
  We wanted to retrospectively evaluate the long-term therapeutic results of iliac arterial stent placement that was done in a single institution for 10 years.
  
  
  METHODS
  From May 1994 to April 2004, 206 patients who underwent iliac arterial stent placement (mean age; 64+/-8.8) were followed up for evaluating the long term stent patency. Combined or subsequent bypass surgery was performed in 72 patients. The follow up period ranged from one month to 120 months (mean; 31+/-25.2 months). The factors that were analyzed for their effect on the patency of stents were age, the stent type and diameter, the lesion site, lesion shape, lesion length, the Society of Cardiovascular and Interventional Radiology criteria, the total run off scores, the Fontaine stage and the cardiovascular risk factors (diabetes mellitus, hypertension and smoking). Follow-up included angiography and/or CT angiography, color Doppler sonography and clinical evaluation with the ankle-brachial index.
  
  
  RESULTS
  Two hundred and eighty-four stents were placed in 249 limbs of 203 patients. The technical success rate was 98% (203/206). The primary patency rates of the stents at 3, 5, 7 and 10 year were 87%, 83%, 61% and 49%, respectively. One hundred seventy-seven patients maintained the primary stent patency until the final follow up and 26 patients showed stenosis or obstruction during the follow up. Secondary intervention was performed in thirteen patients. Lesions in the external iliac artery (EIA) or lesions in both the common iliac artery (CIA) and EIA were a poor prognostic factor for stent patency. The run off score and stent diameter also showed statistically significant influence on stent patency. The overall complication rate was 6%.
  
  
  CONCLUSIONS
  Iliac arterial stent placement is a safe treatment with favorable long term patency. Lesions in the EIA or lesions in both the EIA and CIA, poor run off vessels and a stent having the same or a larger diameter than 10 mm were the poor prognostic factors for long term stent patency.
authors.affiliation: Department of Radiology and the Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Kwang Bo
authors.initials: KB
authors.lastname: Park
authors.forename: Young Soo
authors.initials: YS
authors.lastname: Do
authors.forename: Jae Hyung
authors.initials: JH
authors.lastname: Kim
authors.forename: Yoon Hee
authors.initials: YH
authors.lastname: Han
authors.forename: Dong Ik
authors.initials: DI
authors.lastname: Kim
authors.forename: Duk Kyung
authors.initials: DK
authors.lastname: Kim
authors.forename: Young Wook
authors.initials: YW
authors.lastname: Kim
authors.forename: Sung Wook
authors.initials: SW
authors.lastname: Shin
authors.forename: Sung Ki
authors.initials: SK
authors.lastname: Cho
authors.forename: Sung Wook
authors.initials: SW
authors.lastname: Choo
authors.forename: Yeon Hyeon
authors.initials: YH
authors.lastname: Choe
authors.forename: In Wook
authors.initials: IW
authors.lastname: Choo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001157:Arterial Occlusive Diseases / Q000628:therapy*; D005260:Female; D006801:Humans; D007083:Iliac Artery; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D015607:Stents; D016896:Treatment Outcome; D014654:Vascular Patency