QuantiChrom Urea Assay Kit is used to measure the concentration of urea in plasma and serum samples. To measure kidney function, one of the most parameters measured is blood urea nitrogen (BUN) which measures the amount of nitrogen in the blood in the form of urea. Urea is synthesized in the liver from the ammonia produced from amino acids via the hepatic urea cycle and later transported to the kidneys where it is excreted in the urine.
Quantitation of urea is the most widely used test for the evaluation of kidney function through the analysis of serum, plasma, and urine to determine renal disease and dysfunction. High levels of urea are associated with renal, liver, or other system dysfunction while decreased urea levels are associated with acute hepatic insufficiency or excess parenteral fluid therapy.