My urea levels vary quite a lot. I wonder if it metabolises in drawn blood?
Would this be BUN? Mine is in the high teens usually.
I think BUN is the value of nitrogen in urea. Urea as a whole has MW~60 and the nitrogen in it MW~28 urea is CO(NH2)2 or CH4N2O
Here are some of my recent Urea values:
5.01, 5.6, 5.41, 6.8, 5.47, 4.8, 4.93, 6.3
This is in millimoles. As you can see in two weeks (actually less than two weeks) it has gone from 4.8 to 6.3. I don’t think there is any particular reason for this.
I think you can get BUN in mg/dL by multiplying Urea in mmol/l by about 2.8.
Hence there is a range of 13.44 to 17.64.
The linked plasma urea helpfully uses a completely different scale of mg/dL of actual Urea rather than BUN. The factor for this from mmol is 6.006. Hence 28 to 37.8. Using the line on that chart that is age range average of about 40 through to 70.
I did get some urea values below 4 and have had them over 8.
Urea is I think useful, but the variation is quite high.
