title: [Doppler ultrasound determination of average blood flow velocity and flow volume in transjugular intrahepatic portosystemic shunt (TIPS)].
abstract: OBJECTIVE
  To determine if duplex sonographic measured Time Average Motion (TAM) is an effective parameter for screening examination in routine follow-up after TIPS implantation.
  
  
  METHODS
  35 patients underwent duplex sonographic examination by a 3.5 MHz transducer with a follow-up for 12.4 months.
  
  
  RESULTS
  A reduction of TAM about 60% from baseline proved with a sensitivity of 90% and a specificity of 93.7% the presence of a hemodynamic relevant stenosis, which was confirmed with angiography. We failed to establish a threshold which pointed out with acceptable accuracy the presence of shunt dysfunction.
  
  
  CONCLUSIONS
  TAM is a good parameter in colour-duplex sonography which permits an objective view of TIPS-function. Angiography should be performed only in patients with suspect duplex-results or clinical worsening. A secondary sign of shunt dysfunction is increasing ascites.
authors.affiliation: Univ.-Klinik Innsbruck, Abt. für Radiologie.
authors.forename: D
authors.initials: D
authors.lastname: Fries
authors.forename: G
authors.initials: G
authors.lastname: Bodner
authors.forename: A
authors.initials: A
authors.lastname: Chemelli
authors.forename: J
authors.initials: J
authors.lastname: Loimayr
authors.forename: P
authors.initials: P
authors.lastname: de Koekkoek-Doll
authors.forename: P
authors.initials: P
authors.lastname: Waldenberger
authors.forename: W
authors.initials: W
authors.lastname: Jaschke
mesh_terms: D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity / Q000502:physiology; D001810:Blood Volume / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011169:Portal Vein / Q000000981:diagnostic imaging; D019168:Portasystemic Shunt, Transjugular Intrahepatic; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D014159:Transducers; D018615:Ultrasonography, Doppler, Color / Q000295:instrumentation*
vernacular_title: Dopplersonographische Bestimmung der mittleren Flussgeschwindigkeit und des Flussvolumens im Transjugulären Intrahepatischen Portosystemischen Shunt (TIPS).