All my electrolytes are within range. Could you explain the significance of the creatinine numbers on my kidneys? Need a break? Play the USA TODAY Daily Crossword Puzzle. I might have a knee ...

I am 75. Can you explain the significance of the creatinine numbers on my kidneys? S.W. Creatinine is a waste product of muscles. Everybody has it in their blood. The kidneys get rid of creatinine ...

Doctors use these BUN and serum creatinine numbers to evaluate kidney function. The BUN level can rise or fall independent of how well the kidneys are functioning, so doctors look not only at the ...