With the use of duplex Doppler ultrasound and color Doppler flow imaging(CDFI), the characteristics of blood supply in neoplasma were studied in 51 cases of 60 liver tumors, and compared with the results of surgery, pathological examination and hepatic anerial angiography. The result showed that: 1. Doppler blood flow signals could be detected in all hepatic carcinomas, and in 10 cases of 18 hemangiomas, significant difference was observed (P<0.001); 2. Doppler blood flow spectra showed pulsatile pattern in 41 of 42 hepatic carcinomas, and in 6 of 10 hemangiomas (P<0.01); and 3. the peak flow velocity was obviously lower in hemangioma group than in hepatic carcinoma group (20.34±23.93 vs 64.74±30.18 cm,P<0.001). The characteristics of CDFI show that hemangiomas and hepatocellular carcinomas are different. It can, therefore, be concluded that the blood supply of hepatic carcinomas mainly comes from hepatic arterial system, and is of value in duplex Doppler ultrasound and CDFI.
It has been discovered in portal system hemodynamics research using CDFI and pressure measurement, that among 40 portal hypertension patients the demonstrating rate, of left gastric vein (LGV) was 77.5%, and all were hepatofugal. The demonstrating rates of spontaneous splenorenal vein shunt collaterals and of patency umbilical vein (UV) with blood signal were 85%, 12.5% respectively, and the thrombosis rate of portal system was 10%. Blood flow direction of main portal vein (MPV) in all patients was hepatopetal, and one case of superior mesenteric vein (SMV) and another one of splenic vein (SV) were hepatofugal. The patients with MPV thrombosis or portal system hepatofugal should be operated on by shunt. Shunt capacity of portal vein in gastrosplenic region was 34.07% on average. This demonstrated that devascularization was applicable. Internal diameter, blood capacity and time average velocity (TAV) of the left portal vein (LPV) and right portal vein (RPV) with portal hypertension were almost equal, their difference being not significant (P>0.2). This should be a basis for the diagnosis of portal hypertension. Free portal pressure (FPP) and internal diameter, blood capacity and TAV of MPV, SV, SMV, LGV were not correlative with each other.