[header] How to test kidney function [title] See your physician for a urine " acr " to test your kidney function. [step] The urine " acr " stands for the " albumin to creatinine ratio. " albumin is a protein that is normally present in your blood, and that should generally not be filtered in excess quantities through your kidneys into your urine. 
It is for this reason that protein in your urine (such as albumin) can be indicative of kidney disease. [substeps] If your urine acr comes back " positive, " the test should be repeated for confirmation.