Blood urea test proceedure and interpretation

Hello friends,
I am a biology student at 12th standard and I am pretty excited to know the new facts and fields of this era. And also I am pretty much good at interpreting the reports given by pathologies and other scintific resources. Till now I can interpret a little about the reports but, now I want to know that how can we Interpret the rports of blood urea test. This would be a step only to know that what is the proceedure of the Blood Urea test.
So, can any one here in his/her higher studies and a student of biology or doing MBBS can tell me that what is the proceedure of doing the blood urine test and then how can we interpret the results of that?