C-0970 - Doppler Ultrasonography of the Liver: Made Simple
C-0970 - Doppler Ultrasonography of the Liver: Made SimpleR. BRAHIM1, A. MILADI2, e. djmel1, B. Fraj1, A. AISSA3; 1 tunis/TN 2 Sfax/TN 3 Kairouan sud/TN Type: Educational Exhibit
Area of Interests: Vascular, Veins / Vena cava, Liver
Imaging Techniques: Ultrasound-Power Doppler, Ultrasound-Spectral Doppler, Ultrasound-Colour Doppler
Procedures: Education, Diagnostic procedure
Special Focuses: Cirrhosis, Transplantation, Embolism / Thrombosis
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Learning objectives: The purpose of this exhibit are: To review the terminology used in vascular Doppler US and the basic concepts of flow dynamics in vessels. To describe the normal waveforms, as well as abnormal waveforms and their causes, for each of the three major hepatic vessels.
Background: Doppler ultrasonography (US) is usually the first-line modality for evaluating flow in native liver vessels . Waveforms, which represent flow in each of the major vessels should be recognized, and the mechanisms behind their generation should be understood by those interpreting these examinations. [...]
Findings and procedure details: Hemodynamics of the normal vessels of the liver: Hepatic Arteries The normal hepatic arterial is pulsatile. The flow is antegrade and is displayed above the baseline. Because the liver requires continuous blood flow, the hepatic artery is a low-resistance vessel, with an expected RI ranging from 0[...]
Conclusion: Fluent interpretation of liver Doppler waveforms is achieved when one is able to comfortably transition between conceptual models of blood flow and the observed waveforms. Pathologic conditions have characteristic effects on Doppler waveforms.
References: Millener P, Grant EG, Rose S, Duerinckx A, Schiller VL, Tessler FN, Perrella RR, Ragavendra N. Color Doppler imaging findings in patients with Budd-Chiari syndrome: correlation with venographic findings.AJR Am J Roentgenol. 1993 Aug;161(2):307-12. Chaubal.N, Dighe.N, Vijay Hanchate, Thakkar.N[...]