Sonographic evaluation of transjugular intrahepatic portosystemic shunt.
The purpose of this article is to review the role of sonography before, during and after transjugular intrahepatic portosystemic shunt placement. A sonographic assessment of the liver and abdomen is recommended before the procedure. We illustrate several important sonographic findings for the echographist, which may alter the procedure approach or even preclude transjugular intrahepatic portosystemic shunt placement. The most challenging step during the procedure is the puncture of the right portal vein. Sonography can be a helpful tool in reducing the number of needle passes, thereby reducing the risk of hemorrhagic complications. Because of its non-invasive and cost-benefit nature, sonography is useful for transjugular intrahepatic portosystemic shunt follow-up. A baseline study at 24 to 48 hours is recommended to discover procedure-related complications. Long-term follow-up is important to detect malfunction of the shunt. Doppler ultrasound is very accurate in detecting shunt thrombosis. However, no consensus exists on the optimal sonographic screening protocol for detecting stenosis. We describe three sonographic parameters to detect transjugular intrahepatic portosystemic shunt stenosis with high sensitivity. Finally, additional sonographic parameters and potential pitfalls are provided in order to improve sensitivity.
Department of Radiology, University Hospitals Leuven, Leuven, Belgium.
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Van Holsbeeck
Department of Radiology, University Hospitals Leuven, Leuven, Belgium.
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Thijs
Department of Radiology, University Hospitals Leuven, Leuven, Belgium.
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Bielen
Department of Radiology, University Hospitals Leuven, Leuven, Belgium.
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Heye
Department of Radiology, University Hospitals Leuven, Leuven, Belgium.
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Maleux
D006801:Humans; D008099:Liver / Q000098:blood supply / Q000000981:diagnostic imaging*; D011169:Portal Vein / Q000000981:diagnostic imaging*; D019168:Portasystemic Shunt, Transjugular Intrahepatic / Q000379:methods*; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D014463:Ultrasonography