title: Wallstents and Craggstents in hemodialysis grafts and fistulas: results for selective indications.
abstract: OBJECTIVE
  To report the value of selective placement of self-expandable stents (Wallstent and Craggstent) for the treatment of limitations and, occasionally, of complications of dilation in hemodialysis access, and especially for delaying restenosis.
  
  
  METHODS
  This is a retrospective study of a 7-year period, during which 41 Wallstents and 11 Craggstents were placed in 26 polytetrafluoroethylene (PTFE) grafts, 15 native fistulas, and nine central veins of 47 patients. The indications were stenosis recoil (n = 13), recurrent restenosis within 6 months (n = 33), restenosis after 6 months (n = 3), and acute angioplasty-induced rupture (n = 1). Restenosis after stent placement necessitated redilation and percutaneous declotting and 10 additional stent placements.
  
  
  RESULTS
  Two initial misplacements were corrected immediately. Primary patency rates for PTFE grafts were 58% +/- 10% at 6 months and 23% +/- 10% at 1 year, respectively. Secondary patency rates were 100% at 6 months and 88% +/- 8% at 1 year, respectively. For native fistulas, primary patency rates were 47% +/- 12% at 6 months and 20% +/- 18% at 1 year. Secondary patency rates were 95% +/- 6% at 6 months and 79% +/- 14% at 1 year. It was necessary to reintervene after stent placement to maintain or to restore patency every 9 months for PTFE grafts and every 7.3 months for native fistulas. When stents were placed for treatment of early recurring restenosis, the mean interval between radiologic interventions (redilations or declottings) performed to maintain or to restore patency before stent placement was multiplied by 2.1 after stent placement for both grafts (3.2 months increased to 6.9, P < .01) and native fistulas (2.9 months increased to 6.2, P < .02).
  
  
  CONCLUSIONS
  Wallstents and Craggstents are valuable for the treatment of failure of regular dilation and they double the intervals between reinterventions for early (< 6 months) recurring stenoses in PTFE grafts and native fistulas.
authors.affiliation: Department of Cardiovascular Radiology, Clinique St-Gatien, Tours, France.
authors.forename: L A
authors.initials: LA
authors.lastname: Turmel-Rodrigues
authors.forename: D
authors.initials: D
authors.lastname: Blanchard
authors.forename: J
authors.initials: J
authors.lastname: Pengloan
authors.forename: M
authors.initials: M
authors.lastname: Sapoval
authors.forename: S
authors.initials: S
authors.lastname: Baudin
authors.forename: D
authors.initials: D
authors.lastname: Testou
authors.forename: A
authors.initials: A
authors.lastname: Mouton
authors.forename: M
authors.initials: M
authors.lastname: Abaza
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000714:Anastomosis, Surgical / Q000009:adverse effects; D001164:Arteriovenous Fistula / Q000209:etiology / Q000628:therapy*; D001166:Arteriovenous Shunt, Surgical / Q000009:adverse effects*; D005260:Female; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011138:Polytetrafluoroethylene; D011859:Radiography; D006435:Renal Dialysis / Q000009:adverse effects* / Q000295:instrumentation; D012189:Retrospective Studies; D015607:Stents; D014654:Vascular Patency
chemical_list: D011138:Polytetrafluoroethylene