plasma intermediate density lipoprotein cholesterol level +
serum chylomicron cholesterol level
serum high density lipoprotein cholesterol level +
serum intermediate density lipoprotein cholesterol level
Measurement of the amount of cholesterol, a eukaryotic sterol that in higher animals is the precursor of bile acids and steroid hormones and a key constituent of cell membranes, carried in intermediate-density lipoprotein (IDL) molecules in a specified volume of serum, the clear liquid that separates from blood after it has clotted completely, i.e. blood plasma from which fibrinogen has been removed. IDL are relatively large lipoprotein particles (complex molecules that consist of a protein membrane surrounding a core of lipids) formed by degredation of very low density lipoproteins (VLDL) particles and thus having a size intermediate between those of VLDL and low density lipoproteins. The IDL class of lipoproteins is defined as having a density between 1.006 and 1.019 g/ml.
serum low density lipoprotein cholesterol level +
serum non-high density lipoprotein cholesterol level
serum total cholesterol level +
serum very low density lipoprotein cholesterol level