blood malondialdehyde level serum malondialdehyde level 2014-06-05T13:01:21Z CMO:0002449 The amount of malondialdehyde in a specified sample of serum, the clear liquid that separates from blood after it has clotted completely, i.e. blood plasma from which fibrinogen has been removed. Malondialdehyde is an organic compound with the formula CH2(CHO)2. It is a reactive species which occurs naturally, is generally found in the enol form (HOCH=CH-CHO), and is a marker for oxidative stress. Malondialdehyde is the substrate for the TBARS (thiobarbituric acid reactive substances) assay of lipid peroxidation. VT:0010625 clinical_measurement_ontology jsmith serum MDA level serum lipid peroxide level serum thiobarbituric acid-reactive substance level