The Serum-separating tube reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Serum-separating tube

Also known as a serum separator tube, Tyco Healthcare "Corvac" (trademark) tube, or "SST." Used in medical clinical chemistry tests requiring blood serum. Contains a special gel that causes the red blood cells to clot quickly. These tubes cannot be used for therapeutic drug levels because the drug will diffuse from the serum into the gel, causing a reduction in measured drug level. SST stoppers are either gold or red-gray.

This is the "Serum-separating tube" reference article from the English Wikipedia. All text is available under the terms of the GNU Free Documentation License. See also our Disclaimer.