title: Transjugular intrahepatic portosystemic shunt procedure: efficacy of 10-mm versus 12-mm Wallstents.
abstract: OBJECTIVE
  To compare results of transjugular intrahepatic portosystemic shunt (TIPS) placement with 10- and 12-mm Wallstents.
  
  
  METHODS
  Forty-six TIPS procedures in 47 patients were retrospectively reviewed. Wallstents that were 10 mm in diameter were used in 23 patients, and those that were 12 mm in diameter were used in 23 patients. Immediate results were compared, which included initial portosystemic gradient and Doppler measurements of blood flow velocity through the shunt at 1 day. Long-term patency and velocities were also assessed.
  
  
  RESULTS
  TIPS were successfully created in 46 of 47 patients (98%). In one patient in the 10-mm group, the portal vein could not be accessed. When compared with TIPS in the 10-mm group, TIPS placed in the 12-mm group required dilation to larger diameters (mean, 11.1 vs 9.2 mm; P < .0001) to achieve an identical target gradient of 10 mm Hg and exhibited lower 1-day velocities (mean, 1.3 m/sec vs 1.7 m/sec; P < .03). The 1-day occlusion rate was 17% (four of 23 patients) in the 12-mm group versus 0% in the 10-mm group (P < .02). Patient survival was statistically significantly less in the 12-mm group (P < .03).
  
  
  CONCLUSIONS
  Twelve-millimeter Wallstents yield statistically significantly poorer short- and long-term results in TIPS procedures. This is most likely due to the decreased radial strength of the larger stent, which is 50% less than that of the 10-mm stent.
authors.affiliation: Department of Radiology, Indiana University School of Medicine, Indianapolis 46202-5253, USA.
authors.forename: J
authors.initials: J
authors.lastname: Kuhn-Fulton
authors.forename: S O
authors.initials: SO
authors.lastname: Trerotola
authors.forename: V J
authors.initials: VJ
authors.lastname: Harris
authors.forename: J J
authors.initials: JJ
authors.lastname: Snidow
authors.forename: M S
authors.initials: MS
authors.lastname: Johnson
authors.forename: M A
authors.initials: MA
authors.lastname: Carey
authors.forename: X H
authors.initials: XH
authors.lastname: Zhou
authors.forename: L
authors.initials: L
authors.lastname: Lumeng
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007601:Jugular Veins; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D011168:Portal System / Q000000981:diagnostic imaging; D011170:Portasystemic Shunt, Surgical / Q000295:instrumentation* / Q000379:methods / Q000401:mortality / Q000706:statistics & numerical data; D011172:Portography; D015641:Radiography, Interventional / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D012189:Retrospective Studies; D015607:Stents / Q000706:statistics & numerical data; D014463:Ultrasonography