<s>[INST] Dear Doctor,I have a 1.5 years old sick daughter, I am looking for the written file to understand some clinical numbers of a normal young child(1-2 years old):1: what is the diameter of the hepatic portal vein? 2: what is the frequency of the hepatic portal flow?I will appreciate if you could help me with these information.Kelvin Lu [/INST] 4-8 mm is range for diameter for hepatic portal vein for 1.5 year of children ,  there is no thing like frequency of hepatic portal flow.   please make it clear </s>