title: Overdilation of the Wallstent to optimize portal decompression during transjugular intrahepatic portosystemic shunt placement.
abstract: OBJECTIVE
  To optimize shunt size with overdilation of the Wallstent during creation of a transjugular intrahepatic portosystemic shunt (TIPS).
  
  
  METHODS
  A TIPS was created in 25 patients with variceal bleeding (n = 22) or intractable ascites (n = 3). All shunts were created with one or more Wallstents that were dilated with an 8- or 10-mm balloon. In 11 patients with inadequate portal decompression or persistent filling of varices, shunts were overdilated with a 12-mm balloon.
  
  
  RESULTS
  Mean portosystemic pressure gradient fell from 18.0 mm Hg +/- 6.4 (standard deviation) to 6.8 mm Hg +/- 2.8 after shunt placement. In 11 patients in which shunts were overdilated, the mean gradient fell from 12.7 mm Hg +/- 5.6 after 10-mm dilation to 6.9 mm Hg +/- 2.8 (P = .01) after 12-mm dilation. In six, variceal filling occurred after 10-mm dilation but diminished or ceased after overdilation. Stent disruption did not occur. New or worsened encephalopathy occurred in four of 14 patients with 10-mm and six of 11 patients with 12-mm shunt dilation and responded to medical therapy in all but two.
  
  
  CONCLUSIONS
  Overdilation of the Wallstent during TIPS placement is effective and safe in patients with inadequate portal decompression after 10-mm shunt dilation.
authors.affiliation: Department of Radiology, University of California, San Diego.
authors.forename: K
authors.initials: K
authors.lastname: Valji
authors.forename: J J
authors.initials: JJ
authors.lastname: Bookstein
authors.forename: A C
authors.initials: AC
authors.lastname: Roberts
authors.forename: S B
authors.initials: SB
authors.lastname: Oglevie
authors.forename: A P
authors.initials: AP
authors.lastname: Royster
authors.forename: R R
authors.initials: RR
authors.lastname: Varney
mesh_terms: D000328:Adult; D000368:Aged; D004106:Dilatation; D004932:Esophageal and Gastric Varices / Q000000981:diagnostic imaging / Q000209:etiology; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology; D006801:Humans; D006975:Hypertension, Portal / Q000150:complications / Q000503:physiopathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D017082:Portal Pressure; D011170:Portasystemic Shunt, Surgical / Q000009:adverse effects / Q000379:methods*; D011859:Radiography; D015607:Stents