When I saw my primary about a month ago, she seemed concerned about my kidney function. Last Tuesday she kind of brushed that off and was concerned about low oxygen level. Last thurs I had blood work done for another doctor, concerning my osteoporosis. It showed my creatinine had gone from 1.05 to 1.15 and the bun from 18 to 23. The gfr went from 54.3 to 48.9. Should I be concerned about this. I know my primary was sent a copy of this lab report. I currently do not have an apt with her. She got me an apt with a neurologist for another problem and had me wear a meter on my finger one night to check my oxygen level.