Plasma vs. Serum When blood clots, the liquid portion is now called serum. Serum lacks certain proteins and other elements used in the clotting process.

Published results showed plasma D-dimer was noninferior to serum C-reactive protein and erythrocyte sedimentation rate in the diagnosis of periprosthetic joint infection.“This study demonstrated ...

Background: We aimed to assess absolute plasma-serum differences and differences in ranking of total cholesterol (TC), high-density lipoprotein cholesterol (HDLC), and TC/HDLC ratio in children.