The Micro-Albumin test cassette is intended for the qualitative detection of human serum albumin (HSA) in human urine specimens, as a screening test and as an aid in the diagnosis of renal dysfunction.

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Human serum albumin is the most abundant protein in human blood plasma. The protein is normally not present in urine due to glomerular barrier; however when there is an abnormally high permeability for albumin in the renal glomerulus, small amounts of albumin are filtered into the urine, resulting in microalbuminuria, which is defined as a slight increase in urinary albumin. Microalbuminuria is frequently seen in patients who have renal dysfunction with established diabetes, hypertension, heart failure, cirrhosis and systemic lupus erythematosus (SLE) and other renal diseases. Thus, the measurement of albumin in urine is an indicator of renal dysfunction is such diseases.