title: Short- and long-term evolution of the endoluminal diameter of underdilated stents in transjugular intrahepatic portosystemic shunt.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the short- and long-term evolution of endoluminal diameter of covered metallic stents that were underdilated at the time of transjugular intrahepatic portosystemic shunt (TIPS) creation.
  
  
  METHODS
  Sixteen patients (13 men, 3 women) with a mean age of 57.6years±7.9 (SD) were retrospectively included. All patients had had TIPS creation using a 10-mm diameter covered stent (VIATORR®) that was underdilated (i.e., 8mm) at the time of stent placement. Measurements of the mean circulating diameter of the stents were retrospectively performed on angiographic examinations every 6months up to 2years.
  
  
  RESULTS
  The endoluminal stent diameter early enlarged from 8.96mm±1.12 (SD) to 10mm±1.45 (SD) after 6months (P=0.04) with no further significant changes over time after 12months (10.28mm±1.9mm), 18months (9.93±1.51mm) and 24months (9.92±0.9mm).
  
  
  CONCLUSIONS
  Our results demonstrate a passive expansion of initially underdilated covered stents during the six months following TIPS creation. This should be taken into account regarding hepatic encephalopathy prevention during TIPS placement.
authors.affiliation: Department of Radiology, Hôpital Saint-André, 1, rue Jean-Burguet, 33000 Bordeaux, France. Electronic address: sophieborghol@gmail.com.
authors.forename: S
authors.initials: S
authors.lastname: Borghol
authors.affiliation: Department of Hepato-Gastroenterology, Hôpital Trousseau, 37044 Tours, France.
authors.forename: J M
authors.initials: JM
authors.lastname: Perarnau
authors.affiliation: Department of Radiology, Hôpital Trousseau, 37044 Tours, France.
authors.forename: J
authors.initials: J
authors.lastname: Pucheux
authors.affiliation: Department of Hepato-Gastroenterology, Hôpital Trousseau, 37044 Tours, France.
authors.forename: L
authors.initials: L
authors.lastname: D'Alteroche
authors.affiliation: Department of Ultrasonography, Hôpital Trousseau, 37044 Tours, France.
authors.forename: J
authors.initials: J
authors.lastname: Ayoub
authors.affiliation: Department of Radiology, Hôpital Saint-André, 1, rue Jean-Burguet, 33000 Bordeaux, France.
authors.forename: H
authors.initials: H
authors.lastname: Trillaud
mesh_terms: D000368:Aged; D004106:Dilatation / Q000295:instrumentation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D019168:Portasystemic Shunt, Transjugular Intrahepatic / Q000295:instrumentation*; D011474:Prosthesis Design; D012189:Retrospective Studies; D014655:Vascular Resistance / Q000502:physiology*
keywords: Interventional radiology; Stent; Transjugular intrahepatic portosystemic shunt (TIPS)