title: Doppler evaluation of transjugular intrahepatic portosystemic shunts.
abstract: Transjugular intrahepatic portosystemic shunts are becoming an increasingly popular technique for the treatment of portal hypertension and its complications. However, to maintain patency, revisions are periodically required to treat stenosis and thrombosis. At many centers, Doppler sonography is used for routine follow-up. A variety of hemodynamic parameters, including main portal vein velocity, maximum stent velocity, minimum stent velocity, velocity gradient in the stent, temporal changes in stent velocity, flow direction in the intrahepatic portal and hepatic veins, and pulsatility of flow in the stent can be used. Many studies have confirmed that Doppler sonography is a valuable, noninvasive means of detecting stent malfunction, although the criteria vary somewhat at different institutions.
authors.affiliation: Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis 63110, Missouri, USA.
authors.forename: William D
authors.initials: WD
authors.lastname: Middleton
authors.forename: Sharlene A
authors.initials: SA
authors.lastname: Teefey
authors.forename: Michael D
authors.initials: MD
authors.lastname: Darcy
mesh_terms: D001783:Blood Flow Velocity / Q000502:physiology; D006502:Budd-Chiari Syndrome / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D004932:Esophageal and Gastric Varices / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D008103:Liver Cirrhosis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D011169:Portal Vein / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D019168:Portasystemic Shunt, Transjugular Intrahepatic; D015995:Prevalence; D018608:Ultrasonography, Doppler; D014654:Vascular Patency / Q000502:physiology