title: Comparison of Open-Cell Stent and Closed-Cell Stent for Treatment of Central Vein Stenosis or Occlusion in Hemodialysis Patients.
abstract: BACKGROUND
  Central vein stenosis or occlusion is a common complication that can lead to significant morbidity and dysfunction of access in the hemodialysis patient. More lesions can develop over time, and preserving access becomes a challenge as life expectancy of the hemodialysis patient increases.
  
  
  OBJECTIVE
  The goal was to compare long-term results and determine the outcomes of open-cell stent versus closed-cell stent for central vein stenosis or occlusion in hemodialysis patients.
  
  
  METHODS
  From 1997 to 2015, in 401 hemodialysis patients, stent placement for central vein stenosis or occlusion was performed if balloon angioplasty was unsatisfactory, due to elastic recoil or occurrence of restenosis within 3 months. When thrombus was present, primary stenting was performed. A total of 257 open-cell stents and 144 closed-cell stents were used. Angiographic findings including lesion site, central vein stenosis or occlusion, and presence of thrombosis and complication were evaluated. Primary patency rate and mean patency rate of the stent were compared between two stent groups by Kaplan-Meier survival analysis.
  
  
  RESULTS
  For the open-cell stent group, 159 patients were diagnosed as central vein stenosis and 98 were occlusion. For the closed-cell stent group, 78 were stenosis and 66 were occlusion. There were two complications for central migration and two for procedure-related vein rupture. Open-cell stents and closed-cell stents had mean patency rates of 10.9 ± 0.80 months and 8.5 ± 10.87 months, respectively (P = 0.002).
  
  
  CONCLUSIONS
  The open-cell stent is effective and its performance is higher than that obtained with the closed-cell stent for treating central vein stenosis or occlusion in hemodialysis patients.
authors.affiliation: Department of Radiology, Gangneung Asan Hospital, Gangneung, South Korea.
authors.forename: Chae Hoon
authors.initials: CH
authors.lastname: Kang
authors.affiliation: Department of Radiology, Soonchunhyang University Hospital, Gumi, South Korea.
authors.forename: Seung Boo
authors.initials: SB
authors.lastname: Yang
authors.affiliation: Department of Radiology, Soonchunhyang University Hospital, Gumi, South Korea.
authors.forename: Woong Hee
authors.initials: WH
authors.lastname: Lee
authors.affiliation: Department of Radiology, Gangneung Asan Hospital, Gangneung, South Korea.
authors.forename: Jae Hong
authors.initials: JH
authors.lastname: Ahn
authors.affiliation: Department of Radiology, Soonchunhyang University Hospital, Gumi, South Korea.
authors.forename: Dong Erk
authors.initials: DE
authors.lastname: Goo
authors.affiliation: Department of Radiology, Soonchunhyang University Hospital, Gumi, South Korea.
authors.forename: Nae Jin
authors.initials: NJ
authors.lastname: Han
authors.affiliation: Department of Radiology, Department of Radiology, Chungnam National University Hosiptal, Daejeon, South Korea.
authors.forename: Joon Young
authors.initials: JY
authors.lastname: Ohm
keywords: Angioplasty; Dialysis; Stents; Veins