My wife had a second blood test and results as follows. creatinine 36.0 umol/l. sodium 1.38 umol/l and potassium 4.4 umol/l what does this mean?

Lab work: Every lab has it's own set of normal values. Her doctor should explain these results to her.

Hard to interpret : Blood tests can't be taken out of context. They are only a part of any physician's evaluation and must be interpreted along with the history and physical exam. Also need to know the normal ranges for the particular laboratory. I suspect the sodium is 138, not 1.38, and that is usually within the normal range. So is potassium. Creatinine = 36/88.4=0.41mg/dl seems low. High creatinine is worrisome.