[Echo-Doppler in the study of pre- and post-hepatic portal hypertension].
Portal hypertension is due to a number of pathologic processes; these conditions cause hypertension mostly by hindering the portal flow. The obstacle to portal flow may be located at three different levels--i.e., subhepatic, intrahepatic and suprahepatic. The intrahepatic obstacle is observed in 95% of patients with portal hypertension, while the extra-hepatic causes are rare. This paper is aimed at assessing the diagnostic capabilities of color-Doppler US in the evaluation of pre- and posthepatic portal hypertension. This technique, combining morphologic and Doppler data, allows hypertension to be demonstrated and its degree to be assessed. Color-Doppler US can also define the intra/extrahepatic cause and the level of the obstacle to portal flow. In the diagnosis of the involved processes, the role of color-Doppler US is discussed and compared to the roles of other techniques.
De Gaetano
A M
AM
Istituto di Radiologia, Università Cattolica del Sacro Cuore, Roma.
Maresca
G
G
Barbaro
B
B
Cotroneo
A R
AR
D006502:Budd-Chiari Syndrome / Q000000981:diagnostic imaging; D006801:Humans; D006975:Hypertension, Portal / Q000000981:diagnostic imaging* / Q000209:etiology; D008099:Liver; D011169:Portal Vein / Q000000981:diagnostic imaging*; D013927:Thrombosis / Q000150:complications / Q000000981:diagnostic imaging; D014463:Ultrasonography; D014652:Vascular Diseases / Q000000981:diagnostic imaging
L'eco-Doppler nello studio dell'ipertensione portale pre- e post-epatica.