title: Patency and reintervention rates during routine TIPSS surveillance.
abstract: OBJECTIVE
  To assess the medium-term outcome of transjugular intrahepatic portosystemic stent shunts (TIPSS) by measuring the incidence of shunt obstruction or failure during routine surveillance and the number of interventions performed.
  
  
  METHODS
  This is a retrospective study covering a 4-year period, from 1992 to 1996, during which 102 TIPSS procedures were performed. Indications for treatment were variceal bleeding (76%) and refractory ascites (24%). Follow-up protocol after TIPSS included transfemoral or transjugular portal venography and measurement of portosystemic pressure gradient (PPG) at 3 months, 12 months, and then at yearly intervals. The results of the first 155 venograms on 62 patients (mean follow-up 14 months) have been reviewed and Kaplan-Meier analysis performed.
  
  
  RESULTS
  One hundred and thirty-seven of 155 (88%) examinations showed patent shunts. Fifty-six of 137 (41%) of the patent TIPSS had elevated PPG with signs of stenosis. The majority (41/56) of shunt stenoses with elevated pressure gradients were related to neointimal hyperplasia in the hepatic venous aspect of the shunt. Interventions used to reduce the pressure gradient or to restore patency included: angioplasty (62/102 interventions), additional stents (21/102), a second TIPSS procedure (2/102), and thrombolysis or thrombectomy (4/102). The primary patency rate was 66% at 1 year (52% at 2 years). Primary assisted patency was 72% at 1 year (58% at 2 years). Secondary patency was 86% at 1 year (63% at 2 years).
  
  
  CONCLUSIONS
  The majority of TIPSS shunts will remain patent when regular portal venography, with appropriate intervention, is undertaken. Although there is a high reintervention rate this mainly takes the form of balloon angioplasty.
authors.affiliation: Department of Radiology, Freeman Hospital, Newcastle upon Tyne, UK.
authors.forename: J
authors.initials: J
authors.lastname: Latimer
authors.forename: S M
authors.initials: SM
authors.lastname: Bawa
authors.forename: C J
authors.initials: CJ
authors.lastname: Rees
authors.forename: M
authors.initials: M
authors.lastname: Hudson
authors.forename: J D
authors.initials: JD
authors.lastname: Rose
mesh_terms: D000328:Adult; D000368:Aged; D000800:Angioplasty, Balloon; D001201:Ascites / Q000601:surgery; D003251:Constriction, Pathologic / Q000209:etiology; D004868:Equipment Failure; D004932:Esophageal and Gastric Varices / Q000601:surgery; D005260:Female; D006801:Humans; D008107:Liver Diseases / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010690:Phlebography; D019168:Portasystemic Shunt, Transjugular Intrahepatic; D012008:Recurrence; D012086:Reoperation; D012189:Retrospective Studies; D012720:Severity of Illness Index; D016019:Survival Analysis; D016896:Treatment Outcome; D018615:Ultrasonography, Doppler, Color