We usually diagnose CKD by using blood and urine tests. The blood test, called eGFR, estimates the amount of blood cleaned by your kidneys each minute. The urine test looks for protein in the urine. These tests help us identify signs of kidney damage and tells us what stage you are at (the extent of damage). Chronic kidney disease runs from stage 1 through to stage 5, the higher the stage the less well your kidneys are performing.
Less commonly, taking images or a tissue sample of your kidneys can help diagnose CKD.