automated plasma analysis plasma urea analysis automated plasma urea analysis 2022-03-11T14:54:57Z MMO:0000818 PMID:32084371 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, level or concentration of urea, the chief nitrogenous end product of protein metabolism, in plasma, the clear liquid that separates from blood after it has clotted completely, i.e. blood from which cells and platelets have been removed. measurement_method_ontology slaulede