We have measured the dimensions and blood flow of the portal vein, as well as the resistance rate of the hepatic artery in eighty-two healthy children by using Duplex Doppler Echography. From the data obtained, we have observed that the parameters of size and blood flow of the portal vein increase with the age, weight and height of the child, with a greater correlation with weight and height than with age. We did not observed any difference between males and females nor any variation in the resistance rate of the hepatic artery with age, weight or height.
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