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Test Overview. A microalbumin test checks urine for the presence of a protein called albumin. Albumin is normally found in the blood and filtered by the kidneys. When the kidneys are working properly, albumin is not present in the urine.But when the kidneys are damaged, small amounts of albumin leak into the urine. A blood test to check creatinine levels is often done with a microalbumin urine test. 2  To learn more, see the topic Creatinine and Creatinine Clearance. 3  A less precise test, the urine dipstick test, can be used to check for microalbuminuria in a single sample of urine.
Microalbuminuria is likely to be found in one-third or more of diabetic patients. Microalbuminuria is a risk factor for cardiovascular and renal disease. Antiangiotensin therapy and blood pressure control can reduce urine albumin levels and give renal protection.atients with diabetes are at risk of microalbuminuria if they have any of the following factors: Â· the urine albumin excretion is in the upper range of normal (20â30 mg/d); Â· the systolic blood pressure is greater than 130 mm Hg;