Portal Vein Color & Spectral Doppler Ultrasound Normal Vs Abnormal Images | Liver Vascular USG Scan

Portal Vein Color & Spectral Doppler Ultrasound Normal Vs Abnormal Images | Liver Vascular USG Scan

*Cases
Intro - 0:00
Portal Hypertension - 0:09
Tricuspid Regurgitation - 5:16
Bland Portal Vein Thrombosis - 5:57
Malignant Portal Vein Thrombosis - 7:37
Cavernous Transformation - 8:12
Portal Vein Aneurysm - 8:29

Portal Hypertension:
Hepatofugal flow: Blood flow away from the liver.
Diminished blood flow (Reduced Velocity: Less than 15 cm/s)
Abnormal value of PI
Most common cause is liver cirrhosis
To and fro flow: Alternating hepatopetal and hepatofugal blood flow
Stagnant, low velocity flow (velocity less than 15 cm/s)
Lack of blood flow on color doppler due to portal vein thrombosis
Collateral veins may develop as a compensatory mechanism to bypass the high-pressure system.
Tortuous vascular structures

Tricuspid Regurgitation:
Pulsatile flow due to backflow of blood into the right atrium, affecting venous return, including that of the portal vein.

Bland Portal Vein Thrombosis:
Hyperechoic thrombus within the lumen
Hypoechoic thrombus within the lumen, usually seen in acute cases

Malignant Portal Vein Thrombosis
Associated with HCC or other cancers
The thrombus will have internal flow
Hyperechoic/heterogeneous thrombus

Cavernous Transformation:
Formation of collaterals around the portal vein, at the porta hepatis

Portal Vein Aneurysm:
Abnormal focal dilation of portal vein
Diameter: Greater than 1.5cm