blood aldosterone analysis serum aldosterone analysis 2012-10-04T03:25:01Z Any method which measures aldosterone, a mineralocorticoid steroid hormone produced by the adrenal cortex with action in the renal tubule to retain sodium, conserve water by reabsorption, and increase urinary excretion of potassium, in serum, the clear liquid that separates from blood after it has clotted completely, i.e. blood plasma from which fibrinogen has been removed. For use when the specific method of measuring the aldosterone, such as ELISA, EIA or RIA is not given. JSmith MMO:0000314 measurement_method_ontology