title: Outcome of a retrieval stent filter and 30mm balloon dilator for patients with Budd-Chiari syndrome and chronic inferior vena cava thrombosis: a prospective pilot study.
abstract: OBJECTIVE
  To evaluate the mid-term safety and efficacy of a retrieval stent filter and 30mm balloon dilator in the treatment of Budd-Chiari syndrome (BCS) patients with chronic inferior vena cava (IVC) thrombosis.
  
  
  METHODS
  Twenty-three consecutive patients with BCS and chronic IVC thrombosis were treated with a retrieval stent filter and a 30mm balloon dilator, and subsequently underwent color Doppler ultrasound follow-up at our hospital. Data relating to the technical success, angiographic and ultrasound results, mortality, morbidity, and final clinical outcome were collected retrospectively and follow-ups were performed 1, 3, 6, and 12 months after placement of the stent, and annually thereafter.
  
  
  RESULTS
  Stent filter placement and balloon dilation were technically successful in all patients, with no procedure-related complications. Removal of the stent filter was technically successful in 22 of 23 attempts, yielding a technical successful rate of 95.7% (95% confidence intervals (CI): 87%, 105%). Inferior vena cavagrams performed immediately before stent removal demonstrated that the IVC thrombus had completely resolved in all patients without pulmonary embolism. The mean primary patency rate 3, 6, 12, and 24 months after venoplasty was 0.91 (95% CI: 0.79-1.04), 0.87 (95% CI: 0.72-1.02), 0.87 (95% CI: 0.72-1.02), and 0.87 (95% CI: 0.72-1.02), respectively. The secondary patency rates were 1.00 throughout the follow-up period. All patients are alive with resolution of the symptoms at the time of this report.
  
  
  CONCLUSIONS
  The preliminary results indicate that the retrieval stent filter and 30mm balloon dilator are a safe and effective treatment for BCS patients with chronic IVC thrombosis.
authors.affiliation: Department of Radiology, First Affiliated Hospital, Zhengzhou University Zhengzhou, Henan Province, China.
authors.forename: P-X
authors.initials: PX
authors.lastname: Ding
authors.forename: X-W
authors.initials: XW
authors.lastname: Han
authors.forename: G
authors.initials: G
authors.lastname: Wu
authors.forename: Y-D
authors.initials: YD
authors.lastname: Li
authors.forename: S-F
authors.initials: SF
authors.lastname: Shui
authors.forename: Y-L
authors.initials: YL
authors.lastname: Wang
mesh_terms: D000328:Adult; D000800:Angioplasty, Balloon / Q000379:methods*; D006502:Budd-Chiari Syndrome / Q000000981:diagnostic imaging / Q000628:therapy*; D020878:Device Removal; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011446:Prospective Studies; D015607:Stents; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome; D014463:Ultrasonography; D014654:Vascular Patency; D016306:Vena Cava Filters; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging; D020246:Venous Thrombosis / Q000000981:diagnostic imaging / Q000517:prevention & control*