automated blood analysis blood urea nitrogen analysis automated blood urea nitrogen analysis 2022-04-07T15:05:45Z MMO:0000838 This is a method using a device designed to follow a predetermined sequence of individual operations repeatedly and essentially without external influence or control to measure the amount of nitrogen present in the blood in the form of urea, the chief nitrogenous end product of protein metabolism. Urea is formed in the liver from amino acids and from ammonia compounds and is found in urine, blood, and lymph. automated BUN test measurement_method_ontology slaulede