title: Dialysis access grafts: anatomic location of venous stenosis and results of angioplasty.
abstract: OBJECTIVE
  To determine the distribution of stenoses and results of angioplasty in patients with similar forearm dialysis grafts made of polytetrafluoroethylene (PTFE).
  
  
  METHODS
  Diagnostic radiographs of the fistula obtained in 215 patients were reviewed; 90 patients had similar, unrevised forearm PTFE loop dialysis grafts. The location, morphology, and results of angioplasty were reviewed for each measurable stenosis. Surgical, radiologic, and dialysis records were reviewed to document the subsequent patency rate of each patient's dialysis access.
  
  
  RESULTS
  On the initial diagnostic fistulogram, 93 stenoses were identified. The anatomic distribution included 47% at the venous anastomosis and 11% within 1 cm of the anastomosis. Life table analysis revealed a 6-month patency rate of 63% and a 1-year patency rate of 41% for the first angioplasty in a given graft, and a 6-month patency rate of 44% and a 1-year patency rate of 22% [corrected] for the second angioplasty.
  
  
  CONCLUSIONS
  Performance of serial venous angioplasty procedures may help prolong the life of a graft, but the patency rates diminish with subsequent interventions.
authors.affiliation: Department of Radiology, Washington University School of Medicine, Mallinckrodt Institute of Radiology, St. Louis, MO 63110.
authors.forename: R Y
authors.initials: RY
authors.lastname: Kanterman
authors.forename: T M
authors.initials: TM
authors.lastname: Vesely
authors.forename: T K
authors.initials: TK
authors.lastname: Pilgram
authors.forename: B W
authors.initials: BW
authors.lastname: Guy
authors.forename: D W
authors.initials: DW
authors.lastname: Windus
authors.forename: D
authors.initials: D
authors.lastname: Picus
mesh_terms: D000368:Aged; D000800:Angioplasty, Balloon; D001166:Arteriovenous Shunt, Surgical; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging / Q000628:therapy; D005260:Female; D005542:Forearm / Q000098:blood supply; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D015993:Life Tables; D008297:Male; D010690:Phlebography / Q000379:methods; D011138:Polytetrafluoroethylene; D012008:Recurrence; D006435:Renal Dialysis; D012189:Retrospective Studies; D013382:Subtraction Technique; D014654:Vascular Patency
chemical_list: D011138:Polytetrafluoroethylene