Ultrasonography of portosystemic shunts in dogs and cats.
Ultrasonography is a rapid, accurate, noninvasive diagnostic test for primary (congenital) and secondary (acquired) portosystemic shunting in dogs and cats. Two-dimensional, gray-scale ultrasonography alone enables diagnosis of most congenital portosystemic shunts and determination of intra- versus extrahepatic location. Use of duplex- and color-flow Doppler ultrasonography aids detection of congenital and acquired extrahepatic portosystemic shunts. The underlying cause of acquired portosystemic shunting is portal hypertension; this may be documented by finding either hepatofugal or reduced velocity hepatopetal portal blood flow by duplex-Doppler. Also, ultrasonography may enable detection of lesions involved in the pathogenesis of portal hypertension, for example, hepatic arterioportal fistula, hepatic parenchymal lesions, and portal vein thrombosis.
Lamb
C R
CR
Department of Small Animal Medicine and Surgery, Royal Veterinary College, University of London, United Kingdom.
D000818:Animals; D001164:Arteriovenous Fistula / Q000000981:diagnostic imaging / Q000662:veterinary; D001783:Blood Flow Velocity / Q000662:veterinary; D002371:Cat Diseases / Q000000981:diagnostic imaging; D002415:Cats / Q000002:abnormalities*; D004283:Dog Diseases / Q000000981:diagnostic imaging; D004285:Dogs / Q000002:abnormalities*; D006975:Hypertension, Portal / Q000000981:diagnostic imaging / Q000662:veterinary; D008099:Liver / Q000098:blood supply / Q000000981:diagnostic imaging; D008107:Liver Diseases / Q000000981:diagnostic imaging / Q000662:veterinary; D011169:Portal Vein / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013927:Thrombosis / Q000000981:diagnostic imaging / Q000662:veterinary; D018615:Ultrasonography, Doppler, Color / Q000662:veterinary; D018616:Ultrasonography, Doppler, Duplex / Q000662:veterinary; D014652:Vascular Diseases / Q000000981:diagnostic imaging / Q000662:veterinary; D014682:Vena Cava, Inferior / Q000002:abnormalities* / Q000000981:diagnostic imaging